This best-seller contains pure L-glutamine powder – nothing else. It supports recovery after exercise. Fitness Labs L-glutamine also supports immune and digestive health. It’s ideal for athletes engaged in strenuous exercise and those concerned about aging.* Only fermented L-glutamine is used, not synthetic. This L-glutamine powder is mild tasting and mixes easily into liquids. Each scoop contains 5 grams of L-glutamine. Take 2 to 5 grams daily.