USANA Reviews Philippines - Pure Rest Pill Along with diet and exercise, getting enough sleep is an important part of a healthy lifestyle. Are you ready to restore your natural sleep cycles without sleeping pills? Normal sleep cycles help you feel more energized, promote healthy immune function, and support antioxidant defense. Pure rest is USANA's fast-acting, ultra pure melatonin supplement. MELATONIN is a natural occuring hormones that regulates sleep and wake cycles.