Korean Red Pine

What Is Korean Red Pine?

Korean red pine is a two-needled pine named for its red-brown, flaking bark, and it is the most widespread pine in Korea. Its needles, pollen and inner bark have long been used as food and medicine there ^{1,2Reference 1Earle · 2023Pinus densiflora — species description, distribution, habitat, fire ecology, conservation status and economic uses — reference databaseView study →Reference 2Kim et al. · 2026ReviewMajor phenolic compounds in Korean red pine (Pinus densiflora Sieb. et Zucc.) bark and their potential health benefits — reviewView study →}.

Pinus densiflora grows across Korea, Japan, eastern China and the Russian Far East, from coastal sands into the lower mountains ^{1Reference 1Earle · 2023Pinus densiflora — species description, distribution, habitat, fire ecology, conservation status and economic uses — reference databaseView study →}. It can reach 36 m. In Korean art and folklore it is a symbol of longevity, and in Japan it supplied much of the structural timber of older buildings ^{1Reference 1Earle · 2023Pinus densiflora — species description, distribution, habitat, fire ecology, conservation status and economic uses — reference databaseView study →}.

The bark is rich in proanthocyanidins, catechin and taxifolin, and the needles carry volatile terpenes ^{2,16Reference 2Kim et al. · 2026ReviewMajor phenolic compounds in Korean red pine (Pinus densiflora Sieb. et Zucc.) bark and their potential health benefits — reviewView study →Reference 16Kwon et al. · 2010In vitroInhibitory effects of phenolic compounds from needles of Pinus densiflora on nitric oxide and PGE2 production — in vitroView study →}. Korean and Japanese groups have tested the needles, bark, pollen, cones and root separately in cell and animal studies of memory, inflammation, blood pressure, allergy and infection ^{3,4,5,6,7,8Reference 3Go et al. · 2022Korean red pine (Pinus densiflora) bark extract attenuates Aβ-induced cognitive impairment by regulating cholinergic dysfunction and neuroinflammation — animalView study →Reference 4Park et al. · 2021Neuroprotective and anti-inflammatory effects of Pinus densiflora bark extract in gerbil hippocampus following transient forebrain ischemia — animalView study →Reference 5Jeong et al. · 2022In vitroExtract of Pinus densiflora needles suppresses acute inflammation by regulating inflammatory mediators in RAW264.7 macrophages and animal models — in vitro / animalView study →Reference 6Oh et al. · 2023In vitroAntibacterial and antiviral properties of Pinus densiflora essential oil — in vitroView study →Reference 7Park et al. · 2024Pinus densiflora root extract attenuates osteoarthritis progression by inhibiting inflammation and cartilage degradation — animalView study →Reference 8Jang et al. · 2024In vitroInnate immune-enhancing effect of Pinus densiflora pollen extract via NF-κB pathway activation — in vitroView study →}.

Korean red pine is sometimes confused with Korean pine (Pinus koraiensis), the pine-nut tree. Despite the similar names, they are different species with different uses.

How Is Korean Red Pine Used?

• Needles — solip (솔잎), drunk as a tea (solip-cha) or a fermented drink, and used as a flavouring. This is distinct from the jannip-cha made from Korean pine needles.
• Pollen — songhwa (송화), used in Korean confectionery and medicinally. Masson pine is the pharmacopoeial pollen species in Chinese medicine.
• Bark — the inner bark as a famine food, and in modern research as a polyphenol-rich extract ^{2Reference 2Kim et al. · 2026ReviewMajor phenolic compounds in Korean red pine (Pinus densiflora Sieb. et Zucc.) bark and their potential health benefits — reviewView study →}.
• Cones, root and resin — minor in tradition; each has been studied in the laboratory ^{7,8Reference 7Park et al. · 2024Pinus densiflora root extract attenuates osteoarthritis progression by inhibiting inflammation and cartilage degradation — animalView study →Reference 8Jang et al. · 2024In vitroInnate immune-enhancing effect of Pinus densiflora pollen extract via NF-κB pathway activation — in vitroView study →}.

Korean sources name the parts of the pine individually: pine knots, roots, tips, needles, pollen, cones and bark.

Traditional Uses

Korea — Sonamu

P. densiflora is the pine of Korean food, medicine, architecture and furniture ^{2Reference 2Kim et al. · 2026ReviewMajor phenolic compounds in Korean red pine (Pinus densiflora Sieb. et Zucc.) bark and their potential health benefits — reviewView study →}. Its needles carry the strongest medicinal tradition. They are recorded for rheumatic complaints, haemorrhage and cancer ^{16Reference 16Kwon et al. · 2010In vitroInhibitory effects of phenolic compounds from needles of Pinus densiflora on nitric oxide and PGE2 production — in vitroView study →}, and for vascular, gastrointestinal and urinary disease ^{23Reference 23Shim et al. · 2018Pine needles attenuate receptor activator for nuclear factor-κB ligand (RANKL)-induced trabecular bone loss by inhibiting osteoclast differentiation — animalView study →}. Pine appears among the Korean remedies for stroke ^{14Reference 14Chun et al. · 2008In vitroNeuroprotective effects of several Korean medicinal plants traditionally used for stroke remedy — in vitro / animalView study →}.

The tree is a Korean symbol of longevity ^{1Reference 1Earle · 2023Pinus densiflora — species description, distribution, habitat, fire ecology, conservation status and economic uses — reference databaseView study →}. The needle tea and the fermented needle drink belong to that tradition more than to any single indication.

Japan — Aka-Matsu

In Japan the tree is aka-matsu, the red pine. The needles are made into a tea, matsuba-cha, in the same way as in Korea.

Famine Food — Korea and Japan

The inner bark was eaten in hard years across Korea and Japan, as Scots pine phloem was eaten in Scandinavia.

Botany

Korean red pine is an evergreen tree that grows up to 36 m tall, with an open, irregular or umbrella-shaped crown. On coasts its trunk is often contorted ^{1Reference 1Earle · 2023Pinus densiflora — species description, distribution, habitat, fire ecology, conservation status and economic uses — reference databaseView study →}.

The bark on mature trunks is red-brown and breaks into large plates, or peels in thin, papery flakes. The upper branches develop the same papery reddish bark ^{1Reference 1Earle · 2023Pinus densiflora — species description, distribution, habitat, fire ecology, conservation status and economic uses — reference databaseView study →}.

Its needles grow in pairs and are 8–12 cm long, soft and pliable, and cluster at the ends of the twigs ^{1Reference 1Earle · 2023Pinus densiflora — species description, distribution, habitat, fire ecology, conservation status and economic uses — reference databaseView study →}. The seed cones are conic-ovoid and 4–7 cm long. They stay closed and remain on the branches for several years. Each seed carries a wing, 10–17 mm long including the seed ^{1Reference 1Earle · 2023Pinus densiflora — species description, distribution, habitat, fire ecology, conservation status and economic uses — reference databaseView study →}.

In Japan it closely resembles Japanese black pine (P. thunbergii), which has longitudinally fissured bark on old trees rather than red plates ^{1Reference 1Earle · 2023Pinus densiflora — species description, distribution, habitat, fire ecology, conservation status and economic uses — reference databaseView study →}.

Fire usually kills established trees, but the species re-establishes quickly after a severe fire and comes to dominate the burnt ground. In Japan it spread with agriculture and human disturbance ^{1Reference 1Earle · 2023Pinus densiflora — species description, distribution, habitat, fire ecology, conservation status and economic uses — reference databaseView study →}.

Distribution

Korean red pine grows in Korea, Japan (southern Hokkaido, Honshu, Shikoku and Kyushu) and eastern China (Shandong and Jiangsu). In the Russian Far East it is rare, on rocky slopes, sandy soils and seashores in southern Ussuriland ^{1Reference 1Earle · 2023Pinus densiflora — species description, distribution, habitat, fire ecology, conservation status and economic uses — reference databaseView study →}. It occurs from the coast into the lower mountains, sometimes up to 2,300 m ^{1Reference 1Earle · 2023Pinus densiflora — species description, distribution, habitat, fire ecology, conservation status and economic uses — reference databaseView study →}.

It is classed as Least Concern on the IUCN Red List ^{1Reference 1Earle · 2023Pinus densiflora — species description, distribution, habitat, fire ecology, conservation status and economic uses — reference databaseView study →}. It has been planted as an ornamental in Japan since ancient times and is now widely grown in Europe and North America ^{1Reference 1Earle · 2023Pinus densiflora — species description, distribution, habitat, fire ecology, conservation status and economic uses — reference databaseView study →}. The needles, bark and pollen come from a common, widely cultivated tree, and collecting them raises no conservation concern.

Pine wilt disease has killed large areas of pine forest across the tree’s native range. The pinewood nematode (Bursaphelenchus xylophilus) is carried from tree to tree by Monochamus sawyer beetles. The nematode is native to North America. In the twentieth century it spread to Japan, China, Taiwan and South Korea. Infected trees begin to wilt three to four weeks after infection ^{9Reference 9Cardoso et al. · 2024ReviewPine wilt disease: what do we know from proteomics? — reviewView study →}.

Matsutake (Tricholoma matsutake) is a mycorrhizal mushroom of red pine forest, and Japan’s matsutake harvest has been falling for about 80 years. In a 41-year record from a red pine forest in Nagano Prefecture, the harvest held steady where the forest was thinned and the litter layer cleared, and declined where the forest was left unmanaged ^{10Reference 10Furukawa et al. · 2025Long-term effects of forest management on the dynamics of Tricholoma matsutake harvest over 41 years in a Pinus densiflora forest — field studyView study →}.

Growing Conditions

Cultivation snapshot for Korean Red Pine

Korean red pine tolerates poor, rocky and sandy ground and coastal exposure, and it colonises open and disturbed ground quickly. It is hardy to about USDA zone 5 ^{1Reference 1Earle · 2023Pinus densiflora — species description, distribution, habitat, fire ecology, conservation status and economic uses — reference databaseView study →}.

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Indications

• Memory and cognitive decline [bark extract] ⚠Caution: Tested only in rodents and cell lines. No human study has measured a cognitive outcome ^3,4,11,12,13.
• Stroke and ischaemic brain injury [bark or needle extract]
• Inflammatory conditions [needle extract]
• Osteoarthritis [root extract]
• Atopic dermatitis and allergic skin inflammation [bark or cone extract]
• High blood pressure [bark extract]
• Bacterial and viral infection [essential oil]
• Rheumatic complaints [needles; traditional Korean use]
• Vascular, digestive and urinary complaints [needles; traditional Korean use]
• Longevity and general vitality [needle tea, pine foods; traditional Korean use]

Pharmacology & Research

The research on Korean red pine is preclinical. Needles, bark, pollen, cones and root have each been extracted and tested separately, in cell lines, mice, rats and gerbils. The work covers neuroprotection, inflammation, blood pressure, allergy, arthritis, bone, cancer and antimicrobial activity ^{3,4,5,6,7,8,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26Reference 3Go et al. · 2022Korean red pine (Pinus densiflora) bark extract attenuates Aβ-induced cognitive impairment by regulating cholinergic dysfunction and neuroinflammation — animalView study →Reference 4Park et al. · 2021Neuroprotective and anti-inflammatory effects of Pinus densiflora bark extract in gerbil hippocampus following transient forebrain ischemia — animalView study →Reference 5Jeong et al. · 2022In vitroExtract of Pinus densiflora needles suppresses acute inflammation by regulating inflammatory mediators in RAW264.7 macrophages and animal models — in vitro / animalView study →Reference 6Oh et al. · 2023In vitroAntibacterial and antiviral properties of Pinus densiflora essential oil — in vitroView study →Reference 7Park et al. · 2024Pinus densiflora root extract attenuates osteoarthritis progression by inhibiting inflammation and cartilage degradation — animalView study →Reference 8Jang et al. · 2024In vitroInnate immune-enhancing effect of Pinus densiflora pollen extract via NF-κB pathway activation — in vitroView study →Reference 11Go et al. · 2023AnimalAnti-amnesia-like effect of Pinus densiflora extract by improving apoptosis and neuroinflammation on trimethyltin-induced ICR mice — animalView study →Reference 12Kim et al. · 2024AnimalRed pine bark extract alleviates Akt/GSK-3β signalling disruption in the hippocampus of streptozotocin-induced diabetic Sprague-Dawley rats — animalView study →Reference 13Kim et al. · 2018In vitroNeuroprotective effects of Korean red pine (Pinus densiflora) bark extract and its phenolics — in vitroView study →Reference 14Chun et al. · 2008In vitroNeuroprotective effects of several Korean medicinal plants traditionally used for stroke remedy — in vitro / animalView study →Reference 15Lee et al. · 2017AnimalPine needle extract prevents hippocampal memory impairment in acute restraint stress mouse model — animalView study →Reference 16Kwon et al. · 2010In vitroInhibitory effects of phenolic compounds from needles of Pinus densiflora on nitric oxide and PGE2 production — in vitroView study →Reference 17Kim et al. · 2020AnimalAntihypertensive effects of polyphenolic extract from Korean red pine (Pinus densiflora Sieb. et Zucc.) bark in spontaneously hypertensive rats — animalView study →Reference 18Park et al. · 2021In vitroAntihypertensive effects of dehydroabietic and 4-epi-trans-communic acid isolated from Pinus densiflora — in vitro / animalView study →Reference 19Lee et al. · 2018AnimalPinus densiflora bark extract ameliorates 2,4-dinitrochlorobenzene-induced atopic dermatitis in NC/Nga mice by regulating Th1/Th2 balance and skin barrier function — animalView study →Reference 20Kwon et al. · 2021In vitroEffect of cone of Pinus densiflora on DNCB-induced allergic contact dermatitis-like skin lesion in Balb/c mice — in vitro / animalView study →Reference 21Zhang et al. · 2023In vitroComparison of antibacterial activities of Korean pine (Pinus densiflora) needle steam-distillation extract on Escherichia coli and Staphylococcus aureus, focusing on membrane fluidity — in vitroView study →Reference 22Lee et al. · 2021In vitroPine needle extract applicable to topical treatment for the prevention of human papillomavirus infection — in vitroView study →Reference 23Shim et al. · 2018Pine needles attenuate receptor activator for nuclear factor-κB ligand (RANKL)-induced trabecular bone loss by inhibiting osteoclast differentiation — animalView study →Reference 24Kim et al. · 2020In vitroPine needle hexane extract promotes cell cycle arrest and premature senescence via p27KIP1 upregulation in gastric cancer cells — in vitroView study →Reference 25Jo et al. · 2012In vitroPinus densiflora leaf essential oil induces apoptosis via ROS generation and activation of caspases in YD-8 human oral cancer cells — in vitroView study →Reference 26Park et al. · 2021In vitroMalonic acid isolated from Pinus densiflora inhibits UVB-induced oxidative stress and inflammation in HaCaT keratinocytes — in vitroView study →}.

The bark is the polyphenol-rich part and the needles carry the volatile oil ^{2Reference 2Kim et al. · 2026ReviewMajor phenolic compounds in Korean red pine (Pinus densiflora Sieb. et Zucc.) bark and their potential health benefits — reviewView study →}. A bark result therefore does not carry over to needle tea, and a needle-oil result does not carry over to a bark extract.

No human trial of any Korean red pine preparation has been published.

1. Brain and Memory

This is the most-repeated finding for the species, and it comes almost entirely from the bark.

Korean red pine bark extract improved behavioural measures in amyloid-β-induced mice while raising antioxidant enzyme activity, restoring cholinergic function and lowering inflammatory cytokines ^{3Reference 3Go et al. · 2022Korean red pine (Pinus densiflora) bark extract attenuates Aβ-induced cognitive impairment by regulating cholinergic dysfunction and neuroinflammation — animalView study →}.

The same extract protected the gerbil hippocampus against neuronal death after transient forebrain ischaemia ^{4Reference 4Park et al. · 2021Neuroprotective and anti-inflammatory effects of Pinus densiflora bark extract in gerbil hippocampus following transient forebrain ischemia — animalView study →}.

The same group extended it to a trimethyltin amnesia model, again reporting improved maze performance with reduced apoptosis and neuroinflammation ^{11Reference 11Go et al. · 2023AnimalAnti-amnesia-like effect of Pinus densiflora extract by improving apoptosis and neuroinflammation on trimethyltin-induced ICR mice — animalView study →}, and to the hippocampus of streptozotocin-diabetic rats, where 15–30 mg/kg for 20 days restored Akt and GSK-3β signalling ^{12Reference 12Kim et al. · 2024AnimalRed pine bark extract alleviates Akt/GSK-3β signalling disruption in the hippocampus of streptozotocin-induced diabetic Sprague-Dawley rats — animalView study →}.

An extract standardised on catechin, taxifolin and procyanidins protected PC-12 cells from oxidative stress and inhibited cholinesterase ^{13Reference 13Kim et al. · 2018In vitroNeuroprotective effects of Korean red pine (Pinus densiflora) bark extract and its phenolics — in vitroView study →}.

Needle preparations have been studied less. A water extract was one of several Korean stroke-remedy plants that protected cells against oxygen-glucose deprivation ^{14Reference 14Chun et al. · 2008In vitroNeuroprotective effects of several Korean medicinal plants traditionally used for stroke remedy — in vitro / animalView study →}, and a needle extract blunted stress-induced hippocampal memory impairment in mice ^{15Reference 15Lee et al. · 2017AnimalPine needle extract prevents hippocampal memory impairment in acute restraint stress mouse model — animalView study →}.

Gap: every result is in rodents or cell lines. No human cognitive or neurological outcome has been measured for any part, and the four rodent models come largely from two laboratories.

2. Anti-Inflammatory

A needle extract suppressed acute inflammation in LPS-stimulated RAW264.7 macrophages and in animal models, down-regulating IL-1β, TNF-α, COX-2 and PGE₂ ^{5Reference 5Jeong et al. · 2022In vitroExtract of Pinus densiflora needles suppresses acute inflammation by regulating inflammatory mediators in RAW264.7 macrophages and animal models — in vitro / animalView study →}.

Isolated needle phenolics inhibited nitric-oxide and PGE₂ production in the same cell system ^{16Reference 16Kwon et al. · 2010In vitroInhibitory effects of phenolic compounds from needles of Pinus densiflora on nitric oxide and PGE2 production — in vitroView study →}.

The bark acts on the same pathway: both the neuroprotection and the ischaemia studies attribute part of their effect to suppressed neuroinflammation ^{3,4Reference 3Go et al. · 2022Korean red pine (Pinus densiflora) bark extract attenuates Aβ-induced cognitive impairment by regulating cholinergic dysfunction and neuroinflammation — animalView study →Reference 4Park et al. · 2021Neuroprotective and anti-inflammatory effects of Pinus densiflora bark extract in gerbil hippocampus following transient forebrain ischemia — animalView study →}. The shared mechanism is NF-κB signalling and the downstream COX-2 and PGE₂ axis, with quercetin, kaempferol and the proanthocyanidins as the candidate compounds.

3. Antioxidant

Antioxidant activity tracks phenolic content closely. The bark’s proanthocyanidins, catechin, taxifolin and gallic acid have been reviewed as the active compounds, and their radical-scavenging and enzyme-restoring activity recurs through the neuroprotection and anti-inflammatory data ^{2,13Reference 2Kim et al. · 2026ReviewMajor phenolic compounds in Korean red pine (Pinus densiflora Sieb. et Zucc.) bark and their potential health benefits — reviewView study →Reference 13Kim et al. · 2018In vitroNeuroprotective effects of Korean red pine (Pinus densiflora) bark extract and its phenolics — in vitroView study →}.

Gap: the effect is inferred from constituent chemistry and in-vitro scavenging. No antioxidant endpoint has been measured in an animal disease model or in a person.

4. Blood Pressure

Two independent preclinical studies point the same way.

A polyphenolic bark extract lowered blood pressure in spontaneously hypertensive rats, with the effect attributed to its flavonoid content and antioxidant action on the vasculature ^{17Reference 17Kim et al. · 2020AnimalAntihypertensive effects of polyphenolic extract from Korean red pine (Pinus densiflora Sieb. et Zucc.) bark in spontaneously hypertensive rats — animalView study →}.

Two acids isolated from the needle — dehydroabietic acid and 4-epi-trans-communic acid — inhibited angiotensin-converting enzyme and induced phospho-Akt in human umbilical-vein endothelial cells, with the whole needle extract also active ^{18Reference 18Park et al. · 2021In vitroAntihypertensive effects of dehydroabietic and 4-epi-trans-communic acid isolated from Pinus densiflora — in vitro / animalView study →}.

Gap: ⚠⚠ the human blood-pressure evidence for this compound class belongs to other pines — maritime pine and Masson pine bark extracts. No P. densiflora preparation has been tested in a person for blood pressure.

5. Skin and Allergy

Bark extract improved dinitrochlorobenzene-induced atopic dermatitis in NC/Nga mice, shifting the Th1/Th2 balance and improving skin-barrier markers ^{19Reference 19Lee et al. · 2018AnimalPinus densiflora bark extract ameliorates 2,4-dinitrochlorobenzene-induced atopic dermatitis in NC/Nga mice by regulating Th1/Th2 balance and skin barrier function — animalView study →}.

A cone extract inhibited the allergic-contact-dermatitis chemokines TSLP, TARC and MCP-1 alongside TNF-α and IL-6 in a DNCB model ^{20Reference 20Kwon et al. · 2021In vitroEffect of cone of Pinus densiflora on DNCB-induced allergic contact dermatitis-like skin lesion in Balb/c mice — in vitro / animalView study →}.

Malonic acid isolated from the needle inhibited UVB-induced oxidative stress and inflammation in HaCaT keratinocytes ^{26Reference 26Park et al. · 2021In vitroMalonic acid isolated from Pinus densiflora inhibits UVB-induced oxidative stress and inflammation in HaCaT keratinocytes — in vitroView study →}.

Both dermatitis results are animal models of skin inflammation and converge on cytokine suppression rather than on systemic anti-allergy.

6. Antimicrobial and Antiviral

The antimicrobial activity belongs mainly to the volatile fraction rather than to the water preparation people drink.

An essential oil distilled from the trunk was active against several bacteria, including Bacillus cereus and Listeria monocytogenes, and the yeast Malassezia furfur. It also inhibited influenza A and feline coronavirus in a dose-dependent way in vitro ^{6Reference 6Oh et al. · 2023In vitroAntibacterial and antiviral properties of Pinus densiflora essential oil — in vitroView study →}.

A needle steam-distillation extract was compared for antibacterial potency against Escherichia coli and Staphylococcus aureus, acting on membrane fluidity ^{21Reference 21Zhang et al. · 2023In vitroComparison of antibacterial activities of Korean pine (Pinus densiflora) needle steam-distillation extract on Escherichia coli and Staphylococcus aureus, focusing on membrane fluidity — in vitroView study →}.

A needle extract reduced human papillomavirus infectivity in a topical-application model ^{22Reference 22Lee et al. · 2021In vitroPine needle extract applicable to topical treatment for the prevention of human papillomavirus infection — in vitroView study →}.

Gap: the tested material is essential oil or a concentrated extract, at concentrations a cup of needle tea cannot deliver.

7. Joint and Bone

Two single studies, in two different parts.

A root extract slowed osteoarthritis progression in an animal model by inhibiting inflammation and cartilage degradation ^{7Reference 7Park et al. · 2024Pinus densiflora root extract attenuates osteoarthritis progression by inhibiting inflammation and cartilage degradation — animalView study →}. It is one experiment in one model, in a part with little traditional use.

A needle water extract at 0.25 g/kg for five days attenuated RANKL-induced trabecular bone loss in mice by inhibiting osteoclast differentiation ^{23Reference 23Shim et al. · 2018Pine needles attenuate receptor activator for nuclear factor-κB ligand (RANKL)-induced trabecular bone loss by inhibiting osteoclast differentiation — animalView study →}. A water extract is close to the traditional needle tea.

Gap: neither study has been replicated, and no dose-finding work exists.

8. Cell-Line Anticancer

Cell-line work only.

A needle hexane extract arrested the cell cycle and induced premature senescence in gastric-cancer cells through p27^KIP1^ upregulation ^{24Reference 24Kim et al. · 2020In vitroPine needle hexane extract promotes cell cycle arrest and premature senescence via p27KIP1 upregulation in gastric cancer cells — in vitroView study →}.

The leaf essential oil triggered reactive-oxygen-mediated, caspase-dependent apoptosis in oral cancer cells ^{25Reference 25Jo et al. · 2012In vitroPinus densiflora leaf essential oil induces apoptosis via ROS generation and activation of caspases in YD-8 human oral cancer cells — in vitroView study →}.

Gap: no tumour model and no human data, and the active preparations — a hexane fraction and an essential oil — are not forms the plant is consumed as.

9. Immune Signalling

A pollen extract enhanced innate-immune signalling through NF-κB activation in a macrophage cell line, upregulating immune mediators ^{8Reference 8Jang et al. · 2024In vitroInnate immune-enhancing effect of Pinus densiflora pollen extract via NF-κB pathway activation — in vitroView study →}.

Pine pollen is also a recognised aeroallergen, so the material that stimulates macrophages in a dish is the one that provokes allergy when inhaled.

Mechanisms

The bark’s polyphenols, chiefly proanthocyanidins, catechin and taxifolin, have been studied for radical scavenging and for suppression of NF-κB and the COX-2 and PGE₂ cascade. That pathway recurs across the anti-inflammatory, neuroprotective, dermatitis and joint studies. The needle’s diterpene resin acids have been studied as ACE inhibitors.

The needle and trunk essential oils contain monoterpenes. Their antimicrobial activity is separate from the polyphenol chemistry of the bark.

Clinical trials

No registered trial of Pinus densiflora has been identified in any preparation.

Last checked: September 2026.

Phytochemistry

Korean red pine bark is rich in polyphenols. It contains proanthocyanidins, including procyanidin B1, with catechin, taxifolin, gallic acid and the flavonols quercetin and kaempferol ^{2Reference 2Kim et al. · 2026ReviewMajor phenolic compounds in Korean red pine (Pinus densiflora Sieb. et Zucc.) bark and their potential health benefits — reviewView study →}. This is the same compound class as in maritime pine bark extract.

The needles carry volatile monoterpenes, mainly α-pinene, β-pinene, myrcene and limonene ^{21Reference 21Zhang et al. · 2023In vitroComparison of antibacterial activities of Korean pine (Pinus densiflora) needle steam-distillation extract on Escherichia coli and Staphylococcus aureus, focusing on membrane fluidity — in vitroView study →}. An analysis of the needles’ phenolic fraction isolated four lignans, a flavan-3-ol, two flavonols and shikimic acid ^{16Reference 16Kwon et al. · 2010In vitroInhibitory effects of phenolic compounds from needles of Pinus densiflora on nitric oxide and PGE2 production — in vitroView study →}. An essential oil distilled from the trunk had a different profile, led by 3-cyclohexene-1-methanol and fenchone ^{6Reference 6Oh et al. · 2023In vitroAntibacterial and antiviral properties of Pinus densiflora essential oil — in vitroView study →}.

The resin and needles contain diterpene resin acids, led by abietic acid. A study of the needle isolated dehydroabietic acid and the labdane communic acid as its ACE-inhibiting compounds ^{18Reference 18Park et al. · 2021In vitroAntihypertensive effects of dehydroabietic and 4-epi-trans-communic acid isolated from Pinus densiflora — in vitro / animalView study →}. In a separate analysis, the simple dicarboxylic acid malonic acid was isolated from the needle ^{26Reference 26Park et al. · 2021In vitroMalonic acid isolated from Pinus densiflora inhibits UVB-induced oxidative stress and inflammation in HaCaT keratinocytes — in vitroView study →}.

Bark-extract research on maritime pine concerns a different species and extract, and should be read separately from studies of Korean red pine ^{2Reference 2Kim et al. · 2026ReviewMajor phenolic compounds in Korean red pine (Pinus densiflora Sieb. et Zucc.) bark and their potential health benefits — reviewView study →}.

Constituent Summary

Bark phenolics and needle volatiles are the two main groups.

Proanthocyanidins, the lignan group and the needle hexane fraction are compound classes or fractions and are described above.

Dosage

No human dose has been established for any part. The doses in the literature are animal doses.

• Needle tea — traditional, taken in beverage quantities.
• Bark, pollen, cone and root extracts — research materials with no human dose.

Traditional Dosage

Safety & Pregnancy

The needle tea, pollen and inner bark have a long record of use as food. The concentrated extracts have not been assessed in people.

Full Safety Detail

Food use. Pine needles, pollen and inner bark have been eaten and drunk in Korea and Japan for a very long time, at food quantities, without a toxicity literature accumulating around them.

Extracts. A concentrated bark or root extract at a research dose is a different exposure from a cup of needle tea, and none has been studied in people. The preclinical studies report their treatments as well tolerated in the animals.

Allergy. Pine pollen is a recognised aeroallergen, and songhwa in food is a deliberate ingestion of it.

Interactions. No interaction study exists for this species. Animal and cell work reports neuroactive ^{3,11Reference 3Go et al. · 2022Korean red pine (Pinus densiflora) bark extract attenuates Aβ-induced cognitive impairment by regulating cholinergic dysfunction and neuroinflammation — animalView study →Reference 11Go et al. · 2023AnimalAnti-amnesia-like effect of Pinus densiflora extract by improving apoptosis and neuroinflammation on trimethyltin-induced ICR mice — animalView study →}, immune-modulating ^{8Reference 8Jang et al. · 2024In vitroInnate immune-enhancing effect of Pinus densiflora pollen extract via NF-κB pathway activation — in vitroView study →} and ACE-inhibitory ^{18Reference 18Park et al. · 2021In vitroAntihypertensive effects of dehydroabietic and 4-epi-trans-communic acid isolated from Pinus densiflora — in vitro / animalView study →} activity. The last overlaps the mechanism of the ACE-inhibitor blood-pressure drugs, but no interaction has been measured.

References

1. Earle, C. J. (ed.) (2023). Pinus densiflora — species description, distribution, habitat, fire ecology, conservation status and economic uses — reference database. The Gymnosperm Database. https://www.conifers.org/pi/Pinus_densiflora.php
2. Kim, K. J., Nam, T. G., & Kim, D. O. (2026). Major phenolic compounds in Korean red pine (Pinus densiflora Sieb. et Zucc.) bark and their potential health benefits — review. Food Science and Biotechnology, 35(1), 1–12. https://pubmed.ncbi.nlm.nih.gov/41523676/
3. Go, M. J., Kim, J. M., Kang, J. Y., Park, S. K., & Lee, C. J. (2022). Korean red pine (Pinus densiflora) bark extract attenuates Aβ-induced cognitive impairment by regulating cholinergic dysfunction and neuroinflammation — animal. Journal of Microbiology and Biotechnology, 32(9), 1154–1167. https://pubmed.ncbi.nlm.nih.gov/36039041/
4. Park, J. H., Kim, J. D., Lee, T. K., Han, X., & Sim, H. (2021). Neuroprotective and anti-inflammatory effects of Pinus densiflora bark extract in gerbil hippocampus following transient forebrain ischemia — animal. Molecules, 26(15), 4592. https://pubmed.ncbi.nlm.nih.gov/34361744/
5. Jeong, S. Y., Choi, W. S., Kwon, O. S., Lee, J. S., & Son, S. Y. (2022). Extract of Pinus densiflora needles suppresses acute inflammation by regulating inflammatory mediators in RAW264.7 macrophages and animal models — in vitro / animal. Pharmaceutical Biology, 60(1), 1148–1159. https://pubmed.ncbi.nlm.nih.gov/35695008/
6. Oh, Y. J., Kim, Y. S., Kim, J. W., & Kim, D. W. (2023). Antibacterial and antiviral properties of Pinus densiflora essential oil — in vitro. Foods, 12(23), 4279. https://pubmed.ncbi.nlm.nih.gov/38231728/
7. Park, Y. M., Shin, D. Y., Lee, H. Y., Hwang, H. M., & Kim, J. G. (2024). Pinus densiflora root extract attenuates osteoarthritis progression by inhibiting inflammation and cartilage degradation — animal. Nutrients, 16(22), 3882. https://pubmed.ncbi.nlm.nih.gov/39599668/
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