St. John's Wort (Hypericum perforatum)

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St. John's Wort

贯叶连翘 (Guàn Yè Lián Qiáo) · Hypericum perforatum

The most studied herb for mild-moderate depression — comparable to SSRIs in multiple meta-analyses. Contains hypericin and hyperforin. Significant drug interactions limit use.

Evidence Score
9/10
Strong Evidence
Safety
Use with caution

Good For

Key Benefits

May help the body adapt to stress

Traditionally used to calm the spirit and ease tension

How to Take

Typical dose: Follow product label directions. Typical range: 500-1500mg daily as standardized extract
Forms: capsule, powder, tea/decoction, tincture
Timing: Take with food unless otherwise directed. Allow 2-4 weeks for full effects with tonic herbs
Start with lower doses and increase gradually. Quality and standardization vary between brands.

Safety & Interactions

Possible Side Effects

  • Digestive discomfort at higher doses
  • May cause drowsiness or stimulation depending on the herb
  • Allergic reactions possible in sensitive individuals

Do Not Use If

  • Pregnancy and breastfeeding (insufficient safety data)
  • Children under 12 without professional guidance
  • Scheduled surgery (stop 2 weeks before)

Drug Interactions

  • May interact with prescription medications
  • May affect blood sugar or blood pressure medications
  • Consult pharmacist before combining with other supplements

Traditional Use

In Traditional Chinese Medicine, 贯叶连翘 (Guàn Yè Lián Qiáo) has been used for centuries. It is traditionally used to calm the spirit (shen) and settle the heart-mind.

Modern Research

This herb has extensive scientific backing with hundreds of published studies. Multiple clinical trials support its traditional uses, and active compounds have been well-characterized. It represents one of the more evidence-based options in the herbal pharmacopoeia.

View all studies on PubMed for Hypericum perforatum

Where to Buy

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