These Youtheory Collagen Advanced Formula Tablets are an excellent choice for people who want to feel beautiful inside and out. These tablets are made with collagen types 1, 2 and 3 plus 18 Amino Acids. This advanced-formula collagen vitamin supplement helps you to achieve stronger hair and nails by providing maximum absorption. Formulated with vitamin C for collagen formation, these Youtheory collagen tablets are effective and replenishing. This bottle includes 390 tablets.