Compound Monograph

Shikimic Acid

Organic Acids Natural (plant-derived)

Shikimic acid (3,4,5-trihydroxycyclohex-1-ene-1-carboxylic acid) is the namesake intermediate of the shikimate pathway — the biosynthetic gateway to all aromatic amino acids in plants and microbes but not animals. It is best known as the classic star-anise-derived starting material for the anti-influenza drug oseltamivir (Tamiflu); its own direct bioactivity is modest.

Sources · 9

Where Does It Come From?

Shikimic Acid is a naturally occurring cyclitol / cyclohexene carboxylic acid (shikimate), found in Chinese star anise, Japanese star anise, Ginkgo and 6 other sources. It is well tolerated orally (low toxicity).

Also found in
Chinese star anise Monograph coming soon
Japanese star anise Monograph coming soon
Liquidambar Monograph coming soon
Sweetgum Monograph coming soon
Terminalia arjuna Monograph coming soon
Widely as a low-level pathway intermediate in plants, bacteria and fungi Monograph coming soon

Concentration

Content by Source

Reported concentrations across the plants that contain shikimic acid — the bar marks the typical level, the line shows the reported range.

Typical level Reported range % dry wt
Japanese star anise (Illicium anisatum) fruit 20–24 [1]
Chinese star anise (Illicium verum) fruit 7–17 [1]
Ginkgo (Ginkgo biloba) leaf 9.8 [1]
Sweetgum (Liquidambar spp.) resin/leaf 3–8 [1]
Pine (Pinus spp.) needle 2 [1]

Literature figures for varying plant parts and preparations. Read them as a comparative guide, not exact assays.

Shikimic Acid at a Glance

Shikimic acid is a small cyclitol / cyclohexene carboxylic acid (3,4,5-trihydroxycyclohex-1-ene-1-carboxylic acid) and the namesake intermediate of the shikimate pathway — the seven-step route that plants, bacteria, fungi and apicomplexan parasites use to build the three aromatic amino acids (phenylalanine, tyrosine, tryptophan) and, downstream, most of the phenylpropanoids and phenolics in nature. Animals lack this pathway entirely, a fact that makes it both a herbicide target (glyphosate) and an antimicrobial drug target 3Reference 3Roberts F et al. · 1998Evidence for the shikimate pathway in apicomplexan parasitesView study →. As a pathway intermediate shikimic acid is nearly ubiquitous at trace levels, but it accumulates spectacularly in one place: the fruit of star anise (Illicium), which can be 7–24% shikimic acid by dry weight 1Reference 1Bochkov DV et al. · 2012ReviewShikimic acid: review of its analytical, isolation, and purification techniques from plant and microbial sourcesView study →.

Its fame is almost entirely industrial rather than pharmacological. Shikimic acid is the classic chemical starting material for oseltamivir (Tamiflu), the anti-influenza neuraminidase inhibitor — historically extracted from star anise and now increasingly made by engineered E. coli fermentation 2Reference 2Ghosh S et al. · 2012Production of shikimic acidView study →. It is essential to note that shikimic acid itself is not an antiviral: oseltamivir is a multi-step synthetic derivative, and the parent acid has no clinically useful anti-influenza activity of its own.

Beyond that supply-chain role, shikimic acid’s own direct bioactivity is modest — a scatter of preclinical antithrombotic/antiplatelet, anti-inflammatory, analgesic, antioxidant and neuroprotective signals, mostly in rodents and cells, with no controlled human therapeutic trials 4,6,8Reference 4Veach D et al. · 2016Anti-platelet and anti-thrombogenic effects of shikimic acid in sedentary populationView study →Reference 6Rabelo TK et al. · 2016AnimalShikimic acid inhibits LPS-induced cellular pro-inflammatory cytokines and attenuates mechanical hyperalgesia in miceView study →Reference 8Li X et al. · 2023Shikimic acid regulates the NF-κB/MAPK signaling pathway and gut microbiota to ameliorate DSS-induced ulcerative colitisView study →. It is the shikimate pathway sibling of quinic acid, the other star cyclitol that seeded the earliest oseltamivir syntheses.

The Shikimate Pathway

The single most important fact about shikimic acid is that it names a pathway that does not exist in animals. The shikimate pathway condenses phosphoenolpyruvate and erythrose-4-phosphate and, over seven enzymatic steps, converts them to chorismate — the branch point from which phenylalanine, tyrosine and tryptophan (and thence lignins, flavonoids, alkaloids, folate and countless phenolics) are built. Shikimic acid is the intermediate that gives the whole route its name; shikimate dehydrogenase produces it, and shikimate kinase phosphorylates it onward toward chorismate 3Reference 3Roberts F et al. · 1998Evidence for the shikimate pathway in apicomplexan parasitesView study →.

Because the pathway is essential in plants, bacteria, fungi and apicomplexan parasites but wholly absent from mammals, its enzymes are attractive, selective drug and herbicide targets — you can poison it without a direct human enzyme to hit 3Reference 3Roberts F et al. · 1998Evidence for the shikimate pathway in apicomplexan parasitesView study →. Two consequences dominate:

  • The herbicide glyphosate inhibits EPSP synthase (5-enolpyruvylshikimate-3-phosphate synthase), the pathway’s penultimate enzyme. Blocking it starves plants of aromatic amino acids; the standard human-safety argument for glyphosate is precisely that vertebrates have no shikimate pathway to inhibit.
  • Antimicrobial / antiparasitic targeting. The demonstration of a functional shikimate pathway in Toxoplasma, Plasmodium and other apicomplexans opened the pathway’s enzymes as candidate anti-infective targets for exactly the same “absent in the host” reason 3Reference 3Roberts F et al. · 1998Evidence for the shikimate pathway in apicomplexan parasitesView study →.

The pathway also ties shikimic acid to its cyclitol relatives here: quinic acid sits on an adjacent branch (interconverted via a dehydrogenase closely related to shikimate dehydrogenase), and the downstream phenylpropanoids include caffeic acid and the chlorogenic acids. Shikimic acid is the upstream node from which that entire phenolic economy is derived.

Shikimic Acid & Oseltamivir (Tamiflu)

Shikimic acid’s public profile rests almost wholly on oseltamivir phosphate (Tamiflu), the orally active neuraminidase inhibitor for influenza. The drug’s manufacture has classically started from (−)-shikimic acid, whose three contiguous stereocentres and pre-formed cyclohexene ring provide a cheap enantiopure template for the ~10-step synthesis 2Reference 2Ghosh S et al. · 2012Production of shikimic acidView study →. The load-bearing caveat: shikimic acid is the raw material, not the medicine. Oseltamivir is a heavily elaborated synthetic derivative, and studies of shikimic-acid-derived analogues confirm that the parent skeleton has no meaningful neuraminidase-inhibitory or antiviral activity until it is transformed into the specific oseltamivir structure.

The supply story is genuinely dramatic. For years the world’s shikimic acid came overwhelmingly from extraction of Chinese star anise (Illicium verum) fruit, a slow crop grown mainly in a few provinces of southern China, taking ~6 years to fruit and vulnerable to weather 2Reference 2Ghosh S et al. · 2012Production of shikimic acidView study →. When the H5N1 avian-influenza scare drove governments to stockpile Tamiflu in the mid-2000s, demand for shikimic acid outran the star-anise harvest and became a genuine bottleneck, with much of the global crop diverted to oseltamivir production 2Reference 2Ghosh S et al. · 2012Production of shikimic acidView study →.

That fragility pushed the industry toward microbial fermentation: metabolically engineered E. coli strains fed on glucose now overproduce shikimic acid directly, and biotransformation and total-synthesis routes exist as backups 2Reference 2Ghosh S et al. · 2012Production of shikimic acidView study →. The trajectory, as the production literature frames it, is that recombinant-microbe fermentation is displacing agricultural extraction as the preferred source — decoupling a strategic antiviral from a single seasonal crop 2Reference 2Ghosh S et al. · 2012Production of shikimic acidView study →.

What It's Used For

Set against that industrial importance, shikimic acid’s direct pharmacology is thin and preclinical. There are no controlled human therapeutic trials of the isolate; the human-relevant data is a single ex vivo platelet study, and everything else is rodent or cell work. Scores below are deliberately modest.

A modest antithrombotic / antiplatelet signal:shikimic acid reduces platelet activation markers on human blood ex vivo and shows fibrinolytic and antithrombotic effects across several mouse thrombosis models — “similar to aspirin” in one report, but without a human outcome trial 4,5Reference 4Veach D et al. · 2016Anti-platelet and anti-thrombogenic effects of shikimic acid in sedentary populationView study →Reference 5Park J et al. · 2016Antithrombosis activity of protocatechuic and shikimic acids from functional plant Pinus densiflora Sieb. et Zucc needlesView study →.
Preclinical anti-inflammatory, analgesic and neuroprotective effects:in mice and cells it damps LPS-driven TNF-α/IL-1β, attenuates mechanical hyperalgesia, eases DSS colitis via NF-κB/MAPK, and (via AKT/Nrf2) reduces neuroinflammation and promotes remyelination — all animal/in-vitro, no human data 6,7,8,9Reference 6Rabelo TK et al. · 2016AnimalShikimic acid inhibits LPS-induced cellular pro-inflammatory cytokines and attenuates mechanical hyperalgesia in miceView study →Reference 7Bao X et al. · 2023In vitroShikimic acid (SA) inhibits neuro-inflammation and exerts neuroprotective effects in an LPS-induced in vitro and in vivo modelView study →Reference 8Li X et al. · 2023Shikimic acid regulates the NF-κB/MAPK signaling pathway and gut microbiota to ameliorate DSS-induced ulcerative colitisView study →Reference 9Lu F et al. · 2019AnimalShikimic acid promotes oligodendrocyte precursor cell differentiation and accelerates remyelination in miceView study →.
The honest headline:shikimic acid’s real-world significance is as the chemical feedstock for oseltamivir (Tamiflu), not as a drug — the parent molecule has no clinically useful antiviral activity and no established therapeutic use of its own 2Reference 2Ghosh S et al. · 2012Production of shikimic acidView study →.
Evidence by IndicationStrength of support · Beta

Support is an experimental score — weighted by study type (human > animal > in vitro) and volume. A beta, not a validated metric. Every row here is preclinical (the lone human data is ex vivo), so scores stay modest by design.

Mechanisms

Target / pathwayEffectRelevant to
Platelet activation (PAC-1, CD62P/P-selectin); ADP aggregationreduced (ex vivo human)
antithrombotic / antiplatelet
Fibrin formation / fibrinolysisinhibits fibrin formation, promotes lysis (“aspirin-like”)
antithrombotic
NF-κB / MAPK signallingsuppressed phosphorylation → lower TNF-α, IL-1β, MPO
anti-inflammatorycolitis
AKT / Nrf2activated antioxidant / anti-inflammatory response; lowers ROS
neuroprotectionantioxidant
PI3K / Akt / mTORdrives oligodendrocyte precursor differentiation
remyelination
Gut microbiotashifts composition (↑ Bacteroidetes, ↓ Proteobacteria)
colitis
EPSP synthase / shikimate pathway enzymes (in plants/microbes)the pathway shikimic acid belongs to — glyphosate & antimicrobial target
plant/microbe biology (not human pharmacology)
Influenza neuraminidasenone — shikimic acid is the synthetic precursor of oseltamivir, not itself an inhibitor
the key antiviral caveat

The load-bearing point sits in the last two rows: shikimic acid’s celebrated link to influenza is entirely upstream and synthetic. Its own direct targets (platelets, NF-κB, Nrf2) are real but preclinical and modest.

Pharmacokinetics

Shikimic acid is a small, highly polar, water-soluble acid, and its pharmacokinetics are dominated by poor oral bioavailability and heavy gut-microbial processing. In rats the absolute oral bioavailability is ~10%, with a plasma peak around 3 h and a short terminal half-life (~1.3 h) 10Reference 10Noh K et al. · 2020AnimalPharmacokinetics of shikimic acid following intragastric and intravenous administrations in ratsView study →; in mice bioavailability is ~11–20% with a half-life under 1 h 11Reference 11Liang LY et al. · 2025AnimalPharmacokinetic profile and evaluation of acute and subchronic oral toxicity of shikimic acid in miceView study →. The low bioavailability is attributed to the molecule’s high polarity limiting passive intestinal diffusion plus first-pass and microbial metabolism 10,11Reference 10Noh K et al. · 2020AnimalPharmacokinetics of shikimic acid following intragastric and intravenous administrations in ratsView study →Reference 11Liang LY et al. · 2025AnimalPharmacokinetic profile and evaluation of acute and subchronic oral toxicity of shikimic acid in miceView study →. Critically, orally dosed shikimic acid is aromatised by the gut microflora to benzoate/cyclohexanecarboxylate and conjugated to hippuric acid, which is excreted in urine — a fate it shares with its sibling quinic acid 10Reference 10Noh K et al. · 2020AnimalPharmacokinetics of shikimic acid following intragastric and intravenous administrations in ratsView study →. The practical upshot: plasma shikimic acid after an oral dose is low and short-lived, which further undercuts extrapolating the in-vitro concentrations (0.1–2 mM) used in the platelet work to any realistic human exposure 4,10Reference 4Veach D et al. · 2016Anti-platelet and anti-thrombogenic effects of shikimic acid in sedentary populationView study →Reference 10Noh K et al. · 2020AnimalPharmacokinetics of shikimic acid following intragastric and intravenous administrations in ratsView study →.

Clinical Trials

There are no controlled human therapeutic trials of isolated shikimic acid. The nearest human-tissue evidence is a single ex vivo platelet study on volunteer blood 4Reference 4Veach D et al. · 2016Anti-platelet and anti-thrombogenic effects of shikimic acid in sedentary populationView study →; all other efficacy data are rodent or cell-based. The molecule’s actual clinical footprint is indirect and chemical — as the manufacturing precursor of oseltamivir, the drug that carries the antiviral clinical record 2Reference 2Ghosh S et al. · 2012Production of shikimic acidView study →.

CompletedPlannedTerminatedPreclinical
None for the isolate (human data limited to ex vivo platelets 4Reference 4Veach D et al. · 2016Anti-platelet and anti-thrombogenic effects of shikimic acid in sedentary populationView study →)——Antithrombotic, anti-inflammatory/analgesic, neuroprotective/remyelinating, antioxidant (mouse / in-vitro)

Last checked: July 2026.

Isolate vs. Plant Studies

Unusually, the mechanistic work here is almost all the isolated molecule — the ex vivo platelet study 4Reference 4Veach D et al. · 2016Anti-platelet and anti-thrombogenic effects of shikimic acid in sedentary populationView study →, the LPS/hyperalgesia 6Reference 6Rabelo TK et al. · 2016AnimalShikimic acid inhibits LPS-induced cellular pro-inflammatory cytokines and attenuates mechanical hyperalgesia in miceView study →, DSS-colitis 8Reference 8Li X et al. · 2023Shikimic acid regulates the NF-κB/MAPK signaling pathway and gut microbiota to ameliorate DSS-induced ulcerative colitisView study →, neuroinflammation 7Reference 7Bao X et al. · 2023In vitroShikimic acid (SA) inhibits neuro-inflammation and exerts neuroprotective effects in an LPS-induced in vitro and in vivo modelView study → and remyelination 9Reference 9Lu F et al. · 2019AnimalShikimic acid promotes oligodendrocyte precursor cell differentiation and accelerates remyelination in miceView study → models all dosed purified shikimic acid, and the pharmacokinetic/toxicity studies used the isolate 10,11Reference 10Noh K et al. · 2020AnimalPharmacokinetics of shikimic acid following intragastric and intravenous administrations in ratsView study →Reference 11Liang LY et al. · 2025AnimalPharmacokinetic profile and evaluation of acute and subchronic oral toxicity of shikimic acid in miceView study →. That is a genuine mechanistic base. What is missing is the other half: there are essentially no whole-star-anise or whole-extract clinical studies attributing an effect to shikimic acid in situ, and the one plant-derived antithrombotic study (fermented pine needle) co-isolated protocatechuic acid, blurring attribution 5Reference 5Park J et al. · 2016Antithrombosis activity of protocatechuic and shikimic acids from functional plant Pinus densiflora Sieb. et Zucc needlesView study →. So the honest framing is decent isolate mechanism work, no human outcome data, and little plant-extract context — the reverse of the usual “all the evidence is whole-plant” caveat.

Its Role in Plants & Microbes

In plants and microbes shikimic acid is not a defensive end-product but a central biosynthetic hub. Sitting midway through the shikimate pathway, it is the funnel through which carbon flows from primary metabolism (phosphoenolpyruvate + erythrose-4-phosphate) into chorismate and the aromatic amino acids, and thence into the vast phenylpropanoid economy — lignin, flavonoids, tannins, alkaloids, folate and salicylates 3Reference 3Roberts F et al. · 1998Evidence for the shikimate pathway in apicomplexan parasitesView study →. Roughly 20% of the carbon fixed by plants is estimated to pass through this pathway, which is why shikimic acid is nearly universal yet usually present only as a transient trace intermediate.

Its dramatic accumulation in star anise (Illicium) fruit — up to a quarter of the dry weight 1Reference 1Bochkov DV et al. · 2012ReviewShikimic acid: review of its analytical, isolation, and purification techniques from plant and microbial sourcesView study → — is exceptional and not fully explained; the genus appears to store the intermediate rather than rapidly converting it onward. In microbes the same pathway supplies aromatic amino acids and folate, and because the route is absent in the mammalian host, its enzymes (including shikimate kinase and EPSP synthase) are studied as selective antibacterial and antiparasitic targets 3Reference 3Roberts F et al. · 1998Evidence for the shikimate pathway in apicomplexan parasitesView study →. These are plant/microbe-physiology roles and should not be read as human pharmacology.

Prevalence in Nature

Shikimic acid is effectively ubiquitous as a low-level shikimate-pathway intermediate across plants, bacteria and fungi, but it reaches usable concentrations in only a few sources 1Reference 1Bochkov DV et al. · 2012ReviewShikimic acid: review of its analytical, isolation, and purification techniques from plant and microbial sourcesView study →. The undisputed champion is star anise: Chinese star anise (Illicium verum) fruit runs about 7–17% shikimic acid by dry weight, and Japanese star anise (Illicium anisatum / I. religiosum) can reach ~24% — figures far above ordinary phytochemical abundances 1Reference 1Bochkov DV et al. · 2012ReviewShikimic acid: review of its analytical, isolation, and purification techniques from plant and microbial sourcesView study →. Related Illicium species (I. henryi, I. pachyphyllum) sit in the 16–17% range 1Reference 1Bochkov DV et al. · 2012ReviewShikimic acid: review of its analytical, isolation, and purification techniques from plant and microbial sourcesView study →.

Beyond Illicium, meaningful amounts occur in ginkgo leaf (~10%), sweetgum (Liquidambar) at ~3–8%, pine needles (~2%), and fruits such as Terminalia arjuna (~16%) 1Reference 1Bochkov DV et al. · 2012ReviewShikimic acid: review of its analytical, isolation, and purification techniques from plant and microbial sourcesView study →. It is these accumulating sources — chiefly star anise — that make botanical extraction of shikimic acid commercially viable, though engineered E. coli fermentation is steadily taking over the industrial supply 2Reference 2Ghosh S et al. · 2012Production of shikimic acidView study →.

Major Natural Sources

SourcePartReported shikimic acid
Japanese star anise (Illicium anisatum / religiosum)fruitup to ~24% dry wt 1Reference 1Bochkov DV et al. · 2012ReviewShikimic acid: review of its analytical, isolation, and purification techniques from plant and microbial sourcesView study →
Chinese star anise (Illicium verum)fruit~7–17% dry wt 1Reference 1Bochkov DV et al. · 2012ReviewShikimic acid: review of its analytical, isolation, and purification techniques from plant and microbial sourcesView study →
Terminalia arjunafruit~16% dry wt 1Reference 1Bochkov DV et al. · 2012ReviewShikimic acid: review of its analytical, isolation, and purification techniques from plant and microbial sourcesView study →
Ginkgo (Ginkgo biloba)leaf~9.8% dry wt 1Reference 1Bochkov DV et al. · 2012ReviewShikimic acid: review of its analytical, isolation, and purification techniques from plant and microbial sourcesView study →
Sweetgum (Liquidambar spp.)resin / leaf~3–8% dry wt 1Reference 1Bochkov DV et al. · 2012ReviewShikimic acid: review of its analytical, isolation, and purification techniques from plant and microbial sourcesView study →
Pine (Pinus spp.)needle~2% dry wt 1Reference 1Bochkov DV et al. · 2012ReviewShikimic acid: review of its analytical, isolation, and purification techniques from plant and microbial sourcesView study →

Discovery & Synthesis

Shikimic acid was first isolated in 1885 by the Dutch chemist Johan Fredrik Eijkman, working in Meiji-era Japan, from the fruit of Japanese star anise (Illicium anisatum); the plant’s Japanese name “shikimi” gives the acid its name 1Reference 1Bochkov DV et al. · 2012ReviewShikimic acid: review of its analytical, isolation, and purification techniques from plant and microbial sourcesView study →. Its full stereochemistry as (−)-3,4,5-trihydroxycyclohex-1-ene-1-carboxylic acid was pinned down only decades later, and its central role as the shikimate-pathway intermediate — worked out chiefly by Davis, Sprinson and others in the mid-20th century — turned a botanical curiosity into a cornerstone of biochemistry 3Reference 3Roberts F et al. · 1998Evidence for the shikimate pathway in apicomplexan parasitesView study →.

Its principal modern footprint is as a chiral starting material, not a synthetic target: (−)-shikimic acid’s ready availability and defined stereocentres made it the classic feedstock for oseltamivir (Tamiflu) 2Reference 2Ghosh S et al. · 2012Production of shikimic acidView study →. Commercial shikimic acid is obtained by hot-water/solvent extraction from star anise fruit and, increasingly, by fermentation using metabolically engineered E. coli fed on glucose; total chemical synthesis and biotransformation of quinic acid exist but are less economical 2Reference 2Ghosh S et al. · 2012Production of shikimic acidView study →.

Patents: not yet researched (future patent-loop pass).

Toxicity & Safety

Shikimic acid carries a low toxicity flag, well supported by direct toxicology. In mice its acute oral median lethal dose exceeds 10,000 mg/kg — “practically non-toxic” by WHO criteria — and a 28-day subchronic study at ~1,000–10,000 mg/kg/day produced no mortality and no organ toxicity, with only minor haematological shifts that stayed within normal range 11Reference 11Liang LY et al. · 2025AnimalPharmacokinetic profile and evaluation of acute and subchronic oral toxicity of shikimic acid in miceView study →. It is a natural dietary constituent of star anise, a common culinary spice, and its main metabolic fate is conversion to harmless, readily excreted hippuric acid 10Reference 10Noh K et al. · 2020AnimalPharmacokinetics of shikimic acid following intragastric and intravenous administrations in ratsView study →. There is no meaningful genotoxicity or organ-toxicity signal for the isolate at dietary or the studied research doses.

Two honest caveats belong here. First, the star-anise caution is about the plant, not this molecule: Japanese star anise (Illicium anisatum) and other non-culinary Illicium species contain the potent neurotoxins anisatin/veratric sesquiterpenes and have caused seizures when adulterating culinary Chinese star anise — a hazard of the botanical source that has nothing to do with shikimic acid itself. Second, shikimic acid is not an antiviral and confers no anti-influenza benefit as taken — a widespread misconception traceable to the oseltamivir connection.

Safety at a Glance
Low / no toxicity
  • A well-tolerated dietary acid. Acute oral LD₅₀ >10,000 mg/kg in mice and no subchronic organ toxicity; a natural constituent of culinary star anise, metabolised to harmless hippuric acid 10,11Reference 10Noh K et al. · 2020AnimalPharmacokinetics of shikimic acid following intragastric and intravenous administrations in ratsView study →Reference 11Liang LY et al. · 2025AnimalPharmacokinetic profile and evaluation of acute and subchronic oral toxicity of shikimic acid in miceView study →.
  • Not an antiviral. Shikimic acid is the chemical precursor of oseltamivir (Tamiflu), not a substitute for it — the parent molecule has no clinically useful anti-influenza activity 2Reference 2Ghosh S et al. · 2012Production of shikimic acidView study →.
  • Effects are preclinical. Its antithrombotic, anti-inflammatory and neuroprotective signals are rodent/ex-vivo only; do not read them as established human benefits 4,6,8Reference 4Veach D et al. · 2016Anti-platelet and anti-thrombogenic effects of shikimic acid in sedentary populationView study →Reference 6Rabelo TK et al. · 2016AnimalShikimic acid inhibits LPS-induced cellular pro-inflammatory cytokines and attenuates mechanical hyperalgesia in miceView study →Reference 8Li X et al. · 2023Shikimic acid regulates the NF-κB/MAPK signaling pathway and gut microbiota to ameliorate DSS-induced ulcerative colitisView study →.
  • Don’t confuse the molecule with the plant. Non-culinary Illicium anisatum (Japanese star anise) carries neurotoxic anisatin and has caused poisonings when it adulterates culinary star anise — a source hazard, not a property of shikimic acid.

Pregnancy/lactation is a per-herb / per-supplement decision and is not adjudicated on this molecule page; no isolate-specific reproductive dataset exists for shikimic acid, and no verdict is issued here.

Dosage

There is no established or recommended human dose for isolated shikimic acid, and it is not used as a stand-alone supplement or drug. The figures in the literature are preclinical research doses — for example 50 mg/kg in the mouse colitis model 8Reference 8Li X et al. · 2023Shikimic acid regulates the NF-κB/MAPK signaling pathway and gut microbiota to ameliorate DSS-induced ulcerative colitisView study → and 100–200 mg/kg in the mouse anti-inflammatory/analgesic work 6Reference 6Rabelo TK et al. · 2016AnimalShikimic acid inhibits LPS-induced cellular pro-inflammatory cytokines and attenuates mechanical hyperalgesia in miceView study → — and do not convert to human self-dosing. Ordinary human exposure is dietary and incidental, chiefly from culinary star anise used as a spice; the molecule’s dominant real-world role is as an industrial chemical feedstock for oseltamivir manufacture, not as something taken for an effect 2Reference 2Ghosh S et al. · 2012Production of shikimic acidView study →. These are doses studied in research and are not a personal recommendation.

References

  1. Bochkov DV, Sysolyatin SV, Kalashnikov AI, Surmacheva IA (2012). Shikimic acid: review of its analytical, isolation, and purification techniques from plant and microbial sources. Journal of Chemical Biology. https://pubmed.ncbi.nlm.nih.gov/22826715/
  2. Ghosh S, Chisti Y, Banerjee UC (2012). Production of shikimic acid. Biotechnology Advances. https://pubmed.ncbi.nlm.nih.gov/22445787/
  3. Roberts F, Roberts CW, Johnson JJ, et al. (1998). Evidence for the shikimate pathway in apicomplexan parasites. Nature. https://pubmed.ncbi.nlm.nih.gov/9655396/
  4. Veach D, Hosking H, Thompson K, Santhakumar AB (2016). Anti-platelet and anti-thrombogenic effects of shikimic acid in sedentary population. Food & Function. https://pubmed.ncbi.nlm.nih.gov/27480079/
  5. Park J, Lee B, Choi H, Kim W, Kim HJ, Cheong H (2016). Antithrombosis activity of protocatechuic and shikimic acids from functional plant Pinus densiflora Sieb. et Zucc needles. Journal of Natural Medicines. https://pubmed.ncbi.nlm.nih.gov/26940320/
  6. Rabelo TK, Guimarães AG, Oliveira MA, et al. (2016). Shikimic acid inhibits LPS-induced cellular pro-inflammatory cytokines and attenuates mechanical hyperalgesia in mice. International Immunopharmacology. https://pubmed.ncbi.nlm.nih.gov/27454847/
  7. Bao X, Zheng Z, Lv J, et al. (2023). Shikimic acid (SA) inhibits neuro-inflammation and exerts neuroprotective effects in an LPS-induced in vitro and in vivo model. Frontiers in Pharmacology. https://pubmed.ncbi.nlm.nih.gov/38026972/
  8. Li X, Mo K, Tian G, et al. (2023). Shikimic acid regulates the NF-κB/MAPK signaling pathway and gut microbiota to ameliorate DSS-induced ulcerative colitis. Journal of Agricultural and Food Chemistry. https://pubmed.ncbi.nlm.nih.gov/37257042/
  9. Lu F, Yin D, Pu Y, et al. (2019). Shikimic acid promotes oligodendrocyte precursor cell differentiation and accelerates remyelination in mice. Neuroscience Bulletin. https://pubmed.ncbi.nlm.nih.gov/30684125/
  10. Noh K, Back HM, Shin BS, et al. (2020). Pharmacokinetics of shikimic acid following intragastric and intravenous administrations in rats. Pharmaceutics. https://pubmed.ncbi.nlm.nih.gov/32872397/
  11. Liang LY, Lu TY, Zhong LG, et al. (2025). Pharmacokinetic profile and evaluation of acute and subchronic oral toxicity of shikimic acid in mice. ACS Omega. https://pubmed.ncbi.nlm.nih.gov/40852254/