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HEART FUNCTION

Bilberry

Vaccinium myrtillus

also known as European blueberry

Moderate

A small dark-purple European cousin of the blueberry, traditionally used for diarrhea, mouth inflammation, and circulation. Bilberry gained particular attention during World War II, when British Royal Air Force pilots were said to eat bilberry jam to improve their night vision before sorties. The pilot story is mostly myth, but bilberry's circulation and eye-tissue effects have real evidence behind them.

  • Eases the heavy, swollen leg symptoms of chronic venous insufficiency
  • Strengthens capillary walls and may reduce capillary fragility
  • May support eye health, particularly in conditions involving the small blood vessels of the retina
  • The deep purple anthocyanin pigments are among the most potent antioxidants in the plant kingdom
  • Traditional use for diarrhea and mouth or throat inflammation as a tea or gargle
  • May modestly support healthy blood sugar
Mild blood-thinning effect — caution with blood thinners
May lower blood sugar — caution with diabetes medication
Stop two weeks before surgery
The famous WWII RAF pilot night-vision story has been thoroughly investigated and appears to be wartime propaganda — bilberry doesn't dramatically improve night vision in healthy people
Generally well tolerated; the fruit is food and the jam is dessert
Bilberry leaf is more potent and carries more interaction risks than the berry
Research

NCCIH — Bilberry · MedlinePlus Herbs & Supplements · NIH NCCIH Herbs at a Glance

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The curious few.
50 founding spots left

Know what you're putting in your body.

158 herbs, nutrients, and compounds. What the science says, what tradition knew, and what to watch for. Founding members keep this running.

$60 /year

Founding rate — locked for life. Regular price after launch: $96/year.

  • ✓ Full access to all 158+ entries
  • ✓ Print-ready reference card for every herb
  • ✓ Monthly curated set — 5 herbs, one body system
  • ✓ The Sunday Letter — weekly research digest
  • ✓ Bookmarks synced across devices
  • ✓ Founding rate locked forever
Become a founding member

Cancel any time. No questions asked.