The Nutri-DX range is ideal for improving the performance of athletes with exceptional quality at low cost. Food supplement made from L-Glutamine. How to use: Take 3 capsules a day. If you train in the morning: 2 capsules after training and 1 capsule 30 minutes before lunch. If you train in the afternoon: 2 capsules after training and 1 capsule 30 minutes before dinner.