8 modern-day nutrient deficiencies
Calcium
Over time, calcium shortfalls can increase risk of osteoporosis and bone fractures. But supplement in moderation. Some evidence suggests excess calcium intake from supplements may harm heart health, possibly by depleting magnesium.
Tip: Calculate your daily calcium intake from major sources, particularly dairy products and fortified foods, before adding a supplement.
Daily dose: Up to 1,000−1,200 mg (in divided doses) for adults