L-Glutamine can be converted to glutamic acid, which is both a precursor to
the important inhibitory neurotransmitter GABA (gamma amino butyric acid) and
an excitatory neurotransmitter in its own right. Athletes on high-protein diets
will appreciate the fact that glutamine transports ammonia, the toxic metabolic
by-product of protein breakdown, to the liver. There it is converted into less
toxic urea and then excreted by the kidneys. Finally, glutamine can convert
into alanine, an amino acid that the liver converts into glucose, supplying
additional fuel to muscles during a prolonged workout.

Supplement Facts for tablets
Serving Size: 1 tablet
Amount %DV
L-Glutamine (a free-form amino acid) 500 mg