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Vitamin D

Deficiency can weaken your bones, muscles and immune system. Vitamin D may protect against chronic conditions like heart disease and cancer, too. Try the smartphone app at dminder.ontometrics.com to help optimize how much vitamin D your body makes from sunlight, and then supplement as needed.

Tip: Ask your doctor for a vitamin D blood test. The Vitamin D Council recommends a blood level between 40–80 ng/mL.

Daily dose: 1,000−2,000 IU vitamin D3

Try: Rx Vitamins Liqui-D3