5-HTP may be useful if you are overweight as many believe that weight gain may be caused by decreased amounts of tryptophan to 5-HTP, which causes low serotonin levels, which may cause constant hunger. Adding 5-HTP to your diet may reduce this deficiency and remove these feelings of hunger.

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L-Tryptophan is an essential amino acid made from proteins during the digestion by the action of proteolytic enzymes. It promotes the production of serotonin that is involved in vasopressure regulation. It also helps regulate blood pressure, and prevents atherosclerosis. It is also involved in treating depression, anxiety, enhance mood, improve sleep, and control impulses. It may also be used for treatment of attention deficit patients. It also helps in weight loss because it curbs the cravings and suppresses appetite. L-Tryptophan also plays an important role in the production of niacin. It helps relieve and alleviate the symptoms of fibromyalgia. It also promotes the production of growth hormones.

Melatonin is a hormone secreted by the pineal gland in the brain regulating other hormones and circadian rhythm in the body. It determines when we sleep and when we awake. Activated by darkness, it remains suppressed during the day. Melatonin levels are age related, with children having high levels which diminish with increasing age leading to disturbed sleep in the aged. It controls the onset of menstruation and menopause in women. Melatonin is known for its antioxidant properties. Melatonin supplements prevent insomnia, improve the quality of sleep and increase morning alertness. It is known to stimulate bone growth, prevent headaches and migraines and reduce depression and anxiety. It reduces sleep disturbances in children with ADHD. Reduced melatonin production leads to an increased risk of cancer.