Glutamine is the most abundant amino acid in muscle tissue and plays a key role in many bodily functions. Studies suggest that glutamine supplementation may help to prevent the loss of body mass through the supportive role glutamine plays in protein synthesis. Glutamine is involved in maintaining an already healthy positive nitrogen balance and also aids in supporting the immune system. Supplementing with glutamine may also support a reduction in muscle soreness and help to support muscle tissue. Start supplementing today with RCSS's pure glutamine powder - glutamine-XS. Directions For Glutamine-XS: Take 1 serving of Glutamine-XSTM (2.5 grams) with 4-6 oz of cold water, juice or your favorite beverage. Use in conjunction with a proper diet and exercise regimen to maximize results.