* Science-Based Nutrition * Dietary Supplement * Sustained Release * Enhances healthy circulation* * Supports heart function* * Promotes cardiovascular health* Best sustained release Arginine contains the conditionally essential amino acid L-arginine in a sustained-release formula that allows for enhanced blood levels of this nutrient. L-Arginine is quickly absorbed and is efficiently metabolized, yielding only a short-lived boost to L-arginine levels. Best Sustained Release Arginine tablets are specially manufactured to release the L-Arginine continuously over a 5-7 hour period, resulting in sustained levels in the blood.* L-Arginine has been shown to support cardiovascular health, promote vigorous heart function and enhance healthy circulation.* Research suggests L-arginine supplementation may also have positive benefits on the athletic performance.*