There are a lot of explanations why you feel sleepy during a day a while back. According to a recent study, one of them is telomere shortening in the absence of sleep apnea.

Telomeres protect DNA from biological stressors. The process of telomere shortening is linked to multiple diseases of your heart and blood vessels (in other words, cardiovascular diseases).

Another finding was that there were no differences in telomere length between sleepy and non-sleepy people with sleep apnea.

Curious? HERE is the source