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St Johns Wort 300mg 0.3% 250 Capsule
Supplement Facts | | Serving Size: 1 Capsule | | | Amount per
serving | % Daily*
Value | | St. John's Wort Extract
(Hypericum perforatum) (aerial part with flowers) (standardized to contain 0.3% hypericin) | 300 | mg | | | **Daily value not established.
Suggested Use: As a dietary supplement, take 1 capsule 3 times daily, preferably with meals.
Free of: sugar, salt, soy, yeast, wheat, gluten, corn, milk, preservatives
Other Ingredients: Rice flour, gelatin (capsule), silica and magnesium stearate (vegetable source).
Warnings: Do not exceed 3 capsules daily, unless directed by a health care professional. Larger amounts may contribute to photosensitizing reactions (skin reddening) in the presence of strong sunlight or tanning beds. If you are pregnant/lactating, or are taking any MAO-inhibitors or other anti-depressant medications, consult your health care professional prior to use.
Note: Natural color variations may occur in this product.
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St. John's WortBy Joseph Zhou, Ph.D., Director of Lab Methods, NOW Foods
St. Johns Wort (SJW) is a perennial plant that has oval-shaped leaves and golden-yellow flowers. This plant has been used as an herbal remedy for many centuries. It is used to help heal wounds, as a balm for burns, a treatment of neuralgic conditions such as back pain, and also as a diuretic.. A renewed interest in SJW occurred during the past decade, and it is now a component of numerous herbal preparations for the treatment of anxiety and depression.
Let's look at the chemistry behind SJW. The anthraquinone derivatives hypericin and pseudohypericin are thought to be the two agents responsible for the psychoactive effects of this herb. In addition, a plethora of flavonoids with awful sounding names such as kaempferol, quercetin, quercitrin, isoquercitrin, amentoflavone, luteolin, myricetin, hyperin, hyperoside, and rutin, as well as hyperforin and adhyperforin are also present.
I am responsible for analytical chemistry at NOW Foods, and it is my job to ensure product quality by developing the right methods to analyze our products. So I would like to tell you more about the science behind the methods we use to ensure the quality of our products, and especially about SJW.
As with many natural products, there are a variety of analytical methods that can be used. We first look to official methods. DAC 86 is the older German Pharmaceutical Codex method, designed primarily to detect total hypericins in dried SJW herb material. A different method is DAC 90, which uses an analytical column to separate hypericin and pseudohypericin from the herbal material, and precisely quantify each of them.
The Association of Official Analytical Chemists (AOAC) International is currently in the process to establish an official method for SJW raw material and finished products. The method in consideration can analyze nine ingredients in SJW samples simultaneously. They are hypericin, pseudohypericin, hyperforin, rutin, quercetin, quercitrin, isoquercitrin, hyperoside, and I3,II8-biapigenin.
In order to make sure that we use the best methods available, we have adapted the DAC 90 HPLC method especially for our products, and now we are working on the AOAC method for the analysis of our SJW products. In this way, we work to continually ensure the quality of our products by using the most up-to-date methods available.
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