Biotin is a compound which is relatively sensitive to environmental factors, such as temperature, light or extreme pH values. Therefore, I recommend storing the supplement in a shaded and cold area (in case of relatively warm flats, I would recommend to store the product in the fridge, for prophylactic purposes).
There are practically no studies proving that the excess of biotin may be harmful for the human organism, but the dose provided in one capsule is sufficient to feel the whole effect of supplementation with vitamin B7.
Biotin (vitamin H, co-enzyme R) is in a group of B vitamins, due to the presence of sulphur compounds it is involved in the synthesis of ascorbic acid (vitamin C). Also synthesized in the intestines. It enhances the production of hormones and regulates cholesterol levels. It reduces muscle pain. It prevents hair loss and graying of hair. It soothes the skin inflammations. No toxic effects. Often combined with other B group vitamins and vitamin A. The natural sources of biotin are: whole grain bread, yeast, eggs (yolk), milk, brown rice and cheese.
Daily demand: 100-300 mg per day