If you don’t get out in the sun enough, you may be facing a Vitamin D deficiency.

Vitamin D is one of those supplements that few people know much about, but is vital to health.

Your body makes it through sun exposure. But if you’re in the winter months or you live in an area that doesn’t get much sunlight, Vitamin D supplements are available to make sure you get your daily amount.

However, not all of these supplements may absorb or interact with your body correctly.

For instance, your prescriptions may affect your Vitamin D intake:

Certain medications interact with the absorption of vitamin D supplements and prevent healthy absorption. These medications include antacids, Lipitor, Dovonex, Lanoxin, Cardizem, Dilacor, Tiazac, Cytochrome P450 3A4 (CYP 3A4) substrates, Verapamil and water pills.

Also, if you have underlying health conditions, like kidney disease or hardened arteries, you should avoid Vitamin D supplements.