Getting enough sleep is essential for physical health, mental performance, and emotional well-being, acting as a critical daily rejuvenation process for the body and the brain. It enables memory consolidation, repairs tissues, strengthens the immune system, regulates metabolism, and manages stress with recommended amounts crucial for reducing risk of chronic diseases like diabetes and heart disease. Sleep helps the brain clear out toxins, consolidate memories and enhance learning, concentration, and problem solving skills. 

Studies show that sleep deficiency changes activity in some parts of the brain. If you’re sleep deficient you may have trouble making decisions, solving problems, controlling your emotions and behavior, and coping with change. Sleep deficiency has also been linked to depression, and risk taking behavior. 

Lack of sleep weakens the immune system by reducing the production of protective cytokines, antibodies, and infection-fighting white blood cells. Consistently sleeping less than seven hours per night increases susceptibility to viruses such as common cold, by over 50% and hinders the body’s ability to recover from illness.

Reduced antibody response: sleep loss limits the body’s ability to produce antibodies and T cells which are essential for detecting and destroying pathogens. Increased inflammation: Lack of sleep promotes release of inflammatory cytokines which if prolonged can cause chronic inflammation, cardiovascular disease, and metabolic disorders. Lowered Natural Killer (NK) Cell Activity: Fewer NK cells which fight viral infections in cancer are produced when sleep is deficient. NK cells are a type of white blood cell and key component of the innate immune system acting as a rapid first line defense against virus infected cells and tumors.