Does St Johns Wort Affect Testosterone

During the last two cycles, the protocol added 300 mg of St. John’s wort taken three times daily. Mean testosterone decreased 10.7% (from 44.8 ng/dL to 40.0 ng/dL), and free testosterone dipped 15.8% (from 0.38 ng/dL to 0.32 ng/dL) after the addition of St. John’s wort.

Can St John Wort cause erectile dysfunction?

John’s wort worked no better than a placebo (sugar pill). Also, taking St. John’s wort can cause side effects in some people (including dry mouth, dizziness, anxiety, increased sensitivity to sunlight, and even sexual dysfunction). It can also affect the way the body metabolizes some medications.

Does St Johns Wort increase estrogen?

St. John’s wort might increase the breakdown of estrogen. Taking St. John’s wort along with birth control pills might decrease the effectiveness of birth control pills.