Hair Complex Formula. Containing all the well researched hair maintenance nutrients, B Vitamins, Biotin, Iron and Selenium, in combination with L-Methionine, two silica sources and MSM, this product is a leading formula that should maintain your hair beautifully. Underpinning the formulation is Vitamin C and Kelp to further enhance both absorption and utilisation of the ingredients. The Iron is Bisglycinate (gentle iron) so should not cause intestinal irritation. Biotin, Zinc and Selenium contribute to the Maintenance of normal hair. Should be taken for a minimum of four months for results to be visible, ideally six months.