The recommended dose to treat deficiency for adults varies from 3,000 mcg per day for brittle fingernails up to 7,000 to 15,000 mcg per day for diabetics.
Seems to me it's just a placebo, even though I know a higher dose per day is supposed to help. But it's a water soluble vitamin so if you have too much it just ends up as waste with out being put to good use. There are tons of foods you can eat to increase Biotin levels
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Swiss Chard - This green plant is a top producer of biotin. It's also a great part of a healthy salad choice that will provide antioxidants and help balance a diet.
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Carrots - Carrots contain a supply of biotin, as well as beta-carotene, which helps with general eye health.
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Almonds, Walnuts and Other Nuts - A variety of nuts supply the body with biotin, and are a portable way to get proteins and other nutrition into a diet.
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Chicken Eggs - Eggs are a source of biotin, although it's important to note that eating a diet unusually high in egg whites can actually be a catalyst for a biotin deficiency. That's because a specific element in the egg whites binds to the element and prevents it from being distributed properly. It's important to always consider how eggs are added to a diet in order to prevent this kind of vitamin deficiency.
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Goat's Milk and Cow's Milk - In addition to calcium and other healthy items, milks are also a source of biotin for the body.
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Berries and Fruits - Some types of berries, including strawberries and raspberries, can get the body a significant amount of biotin. These fruits also provide antioxidants and health benefits, as part of a natural, whole food approach to eating. Experts recommend buying local and organic when possible.
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Halibut - In addition to being "brain food," this fish also contains large amounts of biotin. Think about adding it as an occasional entre.
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Vegetables - Other vegetables like onions, cucumbers and cauliflower all contain biotin, and are healthy ways to fit this vitamin into meals.
Why take a pill supplement when great food exists out there that have just as much.