YOUNGSTOWN, Ohio (WYTV) – Some people can have a cup of coffee at night and go to bed just fine, while others will be up all night after a cup. What’s the difference?

Research shows that it can be as simple as a type of gene you have. The gene can control the metabolization of caffeine.

How can you find out what your caffeine sensitivity is? How much caffeine should you intake?

Dr. Shayesteh joined 33 WYTV Daybreak to explain caffeine sensitivity and the effects it can have on your body.

Click here for a complete list of nutrition segments with Dr. Shayesteh.