What are the main ingredients in One A Day?
Information reviewed July 24, 2026
One A Day contains Vitamin D, Calcium, Vitamin B6, Vitamin B12, Vitamin C, and Vitamin E. Always check the product label for the full ingredient list and amounts.
More about One A Day
More questions about One A Day
Reference only
This information is for general reference and is not medical advice. Always consult a licensed healthcare professional about your treatment.