Skin & Nails Zinc contributes to the maintenance of normal skin and nails. Hair Biotin contributes to the maintenance of normal hair. Energy Magnesium contributes to energy yielding metabolism. Brain DHA contributes to normal braind function. Vision Vitamin B2 contributes to maintenance of normal vision. Heart EPA & DHA contribute to the normal function of the heart. Hormonal Activity Vitamin B6 helps to regulate hormonal activity.