The Sunlight Experiment

Herbal Actions

Bitter

Stimulates digestion and appetite via bitter taste receptors

Switches on digestion through the bitter taste itself, stimulating saliva, stomach acid, bile and enzymes before a meal. Taken before eating they sharpen appetite and improve digestion; usually avoided where there is active reflux or a gastric ulcer.

How it works

Bitter is not one mechanism but several overlapping ones. Each of these is its own herbal action — follow a link for the herbs strongest in that mechanism.

Appetite Stimulant Stimulates appetite.

Key constituents

The compound classes most often behind a bitter action.

  • Iridoids
  • Secoiridoids
  • Sesquiterpene lactones

Indications

What typically calls for a bitter herb.

  • Sluggish or weak digestion
  • Poor appetite
  • Bloating and fullness after meals
  • Sluggish liver and bile flow
⚠ Cautions

Best avoided with active reflux, gastritis or a gastric ulcer, where extra acid and bile can aggravate symptoms.

Energetics

Taste
Bitter
Temperature
Cooling and drying
Tradition
The bitter taste itself triggers the digestive cascade — a shared principle across Western, Ayurvedic and Chinese traditions.

Herbs with a bitter action (30)

Key herbs

Herbs for which bitter is a headline action.

Dandelion

Taraxacum officinale

BitterCholagogueCholereticDiuretic

Yarrow

Achillea millefolium

BitterAntioxidantEmmenagogueDiaphoretic
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Andrographis

Andrographis paniculata

BitterImmunomodulatorAnti-inflammatoryAntimicrobial

Burdock

Arctium lappa

AlterativeBitterDiureticLymphatic

Coleus

Coleus forskohlii

AntihypertensiveAntiplateletAntispasmodicCardiotonic

Cornflower

Centaurea cyanus

AstringentAnti-inflammatoryBitter

Dandelion

Taraxacum officinale

BitterCholagogueCholereticDiuretic

Feverfew

Tanacetum parthenium

Anti-inflammatoryVasodilatorEmmenagogueAperient

German Chamomile

Matricaria chamomilla

Anti-inflammatoryAntispasmodicAntiallergicAntibacterial

Ginger

Zingiber officinale

CarminativeAntiemeticAntispasmodicCirculatory Stimulant

Hops

Humulus lupulus

SedativeAntispasmodicAstringentBitter

Motherwort

Leonurus cardiaca

CardiotonicNervineAntispasmodicFemale-tonic

Olive Leaf

Olea europaea

AntihypertensiveAntioxidantBitterAntiviral

Yarrow

Achillea millefolium

BitterAntioxidantEmmenagogueDiaphoretic

Yerba Maté

Ilex paraguariensis

AntiatheroscleroticHypolipidemicAntidiabeticAntioxidant