recommended seven to nine hours negative health outcomes (Huffington Post) insufficient sleep Lack of sleep memory loss, diabetes, obesity bad for you, really bad. seven to nine hours for the average adult itâs not exactly good for you 8 Scary Side Effects of Sleep Deprivation chronic sleeplessness report in the Huffington Post 8 Scary Side Effects Of Sleep Deprivation die younger things that suffer when youâre tired various health problems Sleep deprivation can also detrimental to your health a few of those effects: Huffington Post health problems from a lack of sleep increased risk for heart disease health problems from a lack of sleep