Herb
Vervain
SaveA traditional nervine herb used for stress, tension, and mild digestive stagnation.
Quick verdict
Mostly a traditional-use calming herb with very limited modern trial support.
Evidence score
18/ 100
A rough internal score reflecting quantity, quality, and consistency of human evidence. Not a clinical recommendation.
What the research shows
Vervain has a long history in European herbalism for tension and overwork states, but contemporary controlled human data is scarce.
Benefits
- Used traditionally for stress and nervous tension
- Has a bitter-nervine herbal profile
- Can fit lighter calming tea formulas
Dosage notes
Most often used as tea or tincture in modest traditional amounts.
Side effects
- GI upset
- Drowsiness in some users
Who should be cautious
May cause stomach upset in larger doses and is usually avoided during pregnancy.
What this page cannot tell you
Traditional use is long, but modern randomized evidence is thinner than the reputation suggests.
Leaderboard scores
- Stress15
- Sleep10
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