Thinning hair is a concern for many men and women with statistics reporting that one in three women and an even higher number of men will experience this problem at some stage in their lives. Viviscal is a naturally based dietary supplement that has been specifically designed to address this problem. Viviscal Extra Strength contains the exclusive AminoMar C?äó Marine Complex that supplies vital nutrients needed to nourish thinning hair and promote existing hair growth.