Your nails can say a lot about your health. Adequate intake of vitamins, minerals and nutrients helps support the growth, formation and strength of new nail cells. Here are the 8 most important vitamins and nutrients for keeping your nails healthy. 1. Biotin Biotin is a B complex vitamin, also known as vitamin B8, coenzyme R, and vitamin H. It promotes healthy cell growth and helps in the metabolism of protein amino acids which are essential for nail growth. Biotin is mostly concentrated in organ meats such as liver, but it is also found in egg yolks, dairy products, yeast, salmon, avocado, sweet potato, nuts, seeds