BIGhair contains Quatrefolic®, the fourth generation reduced and methylated folate produced by Gnosis, which is many times more bioavailable than regular folic acid. - Biotin, which helps hair to stay normal. Each capsule contains 5000 μg of biotin. - Horsetail extract, which is a natural source of silicon - Zinc, which helps keep nails normal - Vitamin C, which promotes normal collagen formation. Collagen is a protein that is the largest building block of skin, hair and nails. - Copper promotes normal hair pigmentation - Selenium helps hair and nails to stay normal - Two different natural amino acids, L-lysine and L-methionine - Highly bioavailable QUATREFOLIC® folic acid promotes normal amino acid synthesis - B group vitamins: B6, B12 and pantothenic acid. Nourish your hair for 2-3 months and you'll see the BIGhair effect - it's hard to hide!