What Is It? One A Day Men's has more of what matters to men, including support for heart health. One A Day Men's Multivitamin contains key nutrients to support immune health and physical energy. One A Day has been making trusted, specially formulated multivitamins that provide nutritional support at every stage of life, for over 75 years. Why choose One A Day Men s Multivitamin? One A Day Men's Multivitamin provides 100% Daily Value or more of 18 essential nutrients that support your overall well-being as you thrive Ingredients: Vitamin A (10% as beta-carotene) Vitamin C Vitamin D Vitamin E Vitamin K Thiamin (B1) Riboflavin (B2) Niacin Vitamin B6 Folate (240 mcg folic acid) Vitamin B12 Biotin Pantothenic Acid Calcium Iron Iodine Magnesium Zinc Selenium Copper Manganese Chromium Lycopene.