Actually a good question, so many people talk about 250lb men taking glutamine but never the 140lb woman.
It has been concluded that intravenous infusion of amino acids increases the fractional rate of mixed muscle protein synthesis, but addition of glutamine to the amino acid mixture does not further stimulate muscle protein synthesis rate in healthy young men and women (1).
(1)Metabolism 2000 Dec;49(12):1555-6
Intravenous glutamine does not stimulate mixed muscle protein synthesis in healthy young men and women.
Zachwieja JJ, Witt TL, Yarasheski KE.
Exercise and Nutrition Program, Pennington Biomedical Research Center, Baton Rouge, LA, USA.
Also, glutamine is still the most essential amino acid in the femal body as well, so I would see it as useless to supplement with it. Exogenous glutamine would most likely be useless to the female as well.
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