The amino acid glutamine may be helpful for natural appetite management. It is also the primary fuel of the cells lining the digestive system and the immune system. The slightly sweet powder can be stirred into water or juice or sprinkled on food. Also available as Glutamine capsules. A quarter of a level teaspoon typically provides: Glutamine 900mg. Suggested intake: Take between 1/4 teaspoon (900mg) and 1 1/4 level teaspoons (children over 8 years, 1/4 teaspoon; over 10 years, as adults), 1-3 times a day, between or before meals. Stir into cold water or juice and drink immediately, or for children can be sprinkled onto cold food.