The first study found men who reported having insomnia or who slept for short periods of time were much more likely to die over a 14-year period.
Researchers add, insomnia is a severe problem with very severe side effects that should be treated.
The second study finds teens who sleep less than eight hours a night are more likely to eat a high fat diet that puts them at risk for obesity. Sleep-deprived teens appeared to eat more snacks.
Both studies appear in the latest issue of the journal Sleep.