Biotin (Vitamin B7): Biotin is critical to the creation of keratin, a protein that makes up the construction of nails. Adequate levels of biotin can enhance nail toughness and reduce brittleness. Metanail Complex offers a unique blend of ingredients intended to advertise nail well being. 1 standout component is biotin, https://metanail-complex-reviews74089.link4blogs.com/53546187/new-step-by-step-map-for-metanail-complex-ingredients