Ionic Biotin + Collagen provides high-potency support for healthy hair growth, strong and healthy skin, and strong, thick nails. Along with the combined 50,000 mcg of biotin and collagen, it also boasts 25,000 mcg of a full spectrum complex of ionic trace minerals for body mineral balance. Using the metered dropper, take 2 mL (0.4 tsp) daily. Add to juice or food or take straight as desired. Do not refrigerate. We are America s #1 Trace Minerals Supplement Brand. Since 1972, Trace Minerals branded products have been recognized around the world as the pioneer of ionic trace mineral products that have supported consumers in living healthy lives. Our products are third-party tested to give you the highest quality product with maximum absorption. Feel the difference with Trace Minerals!