Scientific Effect
St. John's Wort is best known as a natural mood and memory booster. It can also contribute to skin health and an easier transition through menopause.
Clinical Study
The acute effect of Hypericum perforatum on short-term memory in healthy adults.
Results
"...acute treatment with small (250 mg) dosages of H. perforatum has a positive effect on the capacity of short-term verbal memory..."
Study Citation
Yechiam, E., Ben-Eliezer, D., Ashby, N. J., & Bar-Shaked, M. (2019). The acute effect of Hypericum perforatum on short-term memory in healthy adults. Psychopharmacology, 236(2), 613-623.
LinkClinical Study
Hypericum perforatum ointment applied twice daily may be effective in reducing psoriasis area severity index scores in mild plaque-type psoriasis...
Results
"The evaluation of the clinical effect of topical St Johns wort (Hypericum perforatum L.) in plaque type psoriasis vulgaris: a pilot study."
Study Citation
Najafizadeh, P., Hashemian, F., Mansouri, P., Farshi, S., Surmaghi, M. S., & Chalangari, R. (2012). The evaluation of the clinical effect of topical St Johns wort (Hypericum perforatum L.) in plaque type psoriasis vulgaris: a pilot study. Australasian Journal of Dermatology, 53(2), 131-135.
LinkClinical Study
St John's wort can be used as an effective treatment for the vasomotor symptoms (hot flashes) of perimenopausal or postmenopausal women.
Results
"Effect of St John's wort on severity, frequency, and duration of hot flashes in premenopausal, perimenopausal and postmenopausal women: a randomized, double-blind, placebo-controlled study."
Study Citation
Abdali, K., Khajehei, M., & Tabatabaee, H. R. (2010). Effect of St John's wort on severity, frequency, and duration of hot flashes in premenopausal, perimenopausal and postmenopausal women: a randomized, double-blind, placebo-controlled study. Menopause, 17(2), 326-331.
Link