Nutrients we eat are metabolized by enzymes in our body. DNA changes can affect how these enzymes work and result in small changes in nutrient levels. How does your DNA affect your calcium levels?

Gluten intolerance is an immune reaction to the gluten found in wheat, barley, and other grains. When gluten is ingested it causes inflammation and damage to the small intestine.

Vitamin D is important for healthy bones and many other functions in the body. You get most of your vitamin D from foods, but your genetics can play a role in how you use vitamin D.

Most of us know the effects of alcohol on our bodies. But did you know that your body also influences some of these effects? A specific genetic factor has been linked to how people metabolize alcohol.

Humans have a natural cycle of wake and sleep. Rare genetic factors can cause big shifts in this cycle, causing people to naturally go to bed hours later than others. This is a very rare trait, and not the same as just staying up late.

Being a world-class endurance athlete takes disciplined training, years of practice, and the right attitude. It also seems that genetics can provide people with an edge. Learn more about one genetic variant found more commonly in endurance athletes.