Zena Takes Collagen to Another LevelCollagen Type IZena Liquid Collagen + Biotin contains Type I collagen which may help contribute to healthy hair, skin smoothness and elasticityCollagen Type IIIZena Liquid Collagen + Biotin contains Type III collagen which helps stimulate the production of the amino acid, glycine, the building block for building muscle and protecting jointsBiotinBiotin is a B-complex vitamin that helps the body convert food into energy. Biotin occurs naturally in many foods, but using a supplement provides a higher dose of biotin to help further support healthier hair, skin, and nailsWhy Should You Choose of Zena Liquid Collagen + Biotin?With just one shot a day of Zena Liquid Collagen + Biotin, among many other benefits, you may start to have noticeably smoother and firmer skin, reduction of cellulite, faster nail growth, and bone and joint health support.Zena Liquid Collagen + Biotin addresses personal care concerns of both men and women by helping promote youthful skin, hair and nails, maintain bone and joint health, and healthy digestion.