Eniva ATP-Pro contains a clinically tested and patented** form of D-Ribose. In university studies it has been shown to support cardiac health, enhance energy production and promote muscle mass gains.* D-Ribose is a cellular regulator of ATP energy production.*At the Heart of a Healthy BodyEniva ATP-Pro is a powerful dietary supplement that provides your body with a patented form of D-Ribose, the most fundamental source of energy your body can have. D-Ribose is what your body uses to naturally build its energy stores. Taking Eniva ATP-Pro helps your body quickly replace energy levels that have been depleted by hard work, exercise, or health challenges.* The patent protection and clinical studies cover a broad range or nutritional and pharmaceutical uses for D-Ribose.Note: This product may cause a short-lived decrease in blood sugar levels. As such, it is recommended to mix this product with your favorite fruit juice and/or take with food. Do not consume on an empty stomach.