Five Reasons You Can Trust Your Health to USANA Health Sciences Groundbreaking nutritional research - USANA invests significant time and money in extensive scientific research and in creating worldwide scientific alliances. First-class ingredients - USANA’s unique ingredient formulas are based on sound, scientifically proven, and clinically tested ingredients. Guaranteed potency - USANA guarantees the potency of its products; what you read on a product label is what you’ll receive in the product. High-quality manufacturing - USANA’s manufacturing facility complies with pharmaceutical-level Good Manufacturing Practices (GMP). Confidence of top athletes - USANA’s GMPs ensure the safety and quality of each product - elite athletes around the world trust their health to USANA.