Dynamic nutrient duos pack a nutrition punch, reports the Harvard Health Letter
The Harvard Health Letter describes several key nutrients that work in pairs:
Vitamin D and calcium: Like most nutrients, calcium is absorbed primarily in the small intestine. If large quantities are present, the body can easily absorb it. But in smaller amounts, the mineral gets absorbed with active assistance from vitamin D. Right now, official nutrition guidelines recommend that adults get 1,000 mg of calcium and 400 IU of vitamin D daily. And some experts say a much higher vitamin D intake—1,000 IU daily or more—is even better.