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A 36-year-old member asked:

what amount st. johns wort is too much?

2 doctor answers3 doctors weighed in
Dr. Ian Cook
Dr. Ian Cook answered
Psychiatry 34 years experience
900mg/d =usual dose: Many studies of St Johns Wort have examined doses of around 300 mg three times daily. (www.nlm.nih.gov/medlineplus/druginfo/natural/329.html) There is a report of potential for overdose (www.drugs.com/npp/st-john-s-wort.html). As a rule of thumb, if a product is intended to effect the brain and body, then some caution is prudent, whether available over-the-counter or by prescription only.
Dr. Ed Friedlander
Pathology 44 years experience
No good studies yet: Different studies have examined different doses, and different companies put different recommendations on their bottles; you've probably noticed. The stuff seems quite safe used judiciously, and some people do wel on higher doses, but it's very dangerous combined with prescription SSRI's, and is a famous sun-sensitizer.

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A 36-year-old member asked:

What is your opinion on taking st.John's wort?

7 doctor answers31 doctors weighed in
Dr. Ahmad M Hadied
Orthopedic Surgery 49 years experience
They say it help: Especially in europe, they use for the treatment of depression.
A 45-year-old member asked:

How does st. John's wort work?

1 doctor answer1 doctor weighed in
Dr. Pamela Pappas
Psychiatry 42 years experience
St. John's Wort: The active constituents in st. John's wort -- hypericin and hyperforin -- appear to modulate the effects of serotonin, dopamine, and norepinephrine, and may inhibit reuptake of these neurotransmitters. The serotonin activities are thought to be the most important in in working with depression. Hyperforin also induces some cyp450 enzymes, leading to reduced concentrations of certain drugs.
A 49-year-old member asked:

What is st. John's wort oil used for?

1 doctor answer2 doctors weighed in
Dr. Heidi Fowler
Psychiatry 25 years experience
Depression: St johns wort is sometimes used for depression & anxiety.
A 42-year-old member asked:

Are there any good fat burners that lack st. John's wort?

1 doctor answer1 doctor weighed in
Dr. Gregg Nishi
Bariatrics 22 years experience
Fat burners: Honestly, the best fat burner is cardiovascular exercise. Herbal supplements are not regulated by the fda which makes then potentially dangerous. I have personally taken care of several patients who have gone into acute liver failure as a result of taking herbal supplements for weight loss. Some even requires a liver transplant. Is it really worth it? Eat healthy and exercise. It's much safer.
CA
A 29-year-old male asked:

What is the definition or description of: st. John's wort?

1 doctor answer2 doctors weighed in
Dr. David Rosenfeld
Pain Management 27 years experience
See below: St john's wort is the plant species hypericum perforatum, and is also known as tipton's weed, rosin rose, goatweed, chase-devil, or klamath weed. St john's wort is widely known as an herbal treatment for depression. In some countries, such as germany, it is commonly prescribed for mild depression, especially in children and adolescents.

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