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Botanical

St. John's Wort

St. John's Wort (Hypericum perforatum) is a flowering plant whose aerial parts contain hypericin, hyperforin and flavonoids. It is mostly studied for low mood.

Also listed as St. John's Wort Extract, St. John's Wort Aerial Parts, St. John's Wort Aerial Parts Extract, St. John's Wort Glycerite Liquid Extract

Stress & MoodSleepCognitionEssential Health

Why the label matters

IQWiG notes that products differ considerably in strength and composition. In Germany, preparations for moderate depression require a prescription. Evidence for a studied extract cannot simply be transferred to a tea or an unrelated supplement. 1

Most studies used 500–1,200 mg daily for at least four weeks; this describes research, not an individual dose recommendation. 1

Sources