Vitamin D

To get enough vitamin D, head outdoors: Your liver makes this vitamin after your skin absorbs sunlight. With the exception of fish oils and some fatty fish, food offers little natural vitamin D. It's added to milk. Vitamin D helps your body absorb and metabolize calcium, strengthening bones. So getting enough Vitamin D is just as important as getting sufficient amounts of calcium.

A sunscreen of 30 SPF or greater appears to block vitamin D production, she adds. Sunscreen users can absorb vitamin D from milk -- but if you don't drink milk, don't forsake your sunscreen. Ask your doctor what's right for you.

Heed the intake suggestions below. More than 2,000 IU daily can be toxic.

Vitamin K

Vitamin K helps make your blood clot and works with calcium and vitamin D to build strong bones.

Normal bacteria in your digestive system help make vitamin K. To ensure you consume enough vitamin K, eat those green vegetables. Your body also can make vitamin K from eggs, milk, and meat.

Vitamin K can interfere with blood-thinning medications Talk with your doctor if you're on such medication or you're not sure.

Zinc

Zinc’s functions in the body are many and diverse. It is involved in the action of many enzymes. Specific functions in humans are difficult to pinpoint but people who don't get enough zinc are at higher risk for growth failure, dermatitis, birth defects, decreased sperm production, and changes in the immune system.