> I remembered that I used to take L-Glutamine for carbohydrate cravings. It definitely worked for that for me, 1 g. dose, had to repeat every few hours if the cravings recurred. So I looked in my "old supplements" drawer. Way at the back L-glutamine, 2 500mg caps left! I do feel better 1/2 hour later, but that could be placebo & other factors. Put it on my grocery list, hopefully the supermarket will have it, if not I know a good supplement store.
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> It is true that L-glutamine is one of the few mood-related neuro-transmitter precursors that passes the blood-brain barrier, so in principle it could have an effect on the GABA/anxiety reducing centre. Especially short-term, since over the long term your body (including the brain) tries to rebalance to its original state. GABA itself does NOT get to the brain, so it is useless as a supplement for that purpose I've tried it too: absolutely no effect.
What I do know is that the brain can use L-glutamine as an alernative fuel to glucose thus helping low sugar cravings. The most important thing is to knock the carbs on the head. Eat mainly protein at each meal with but pref no carbs, and a small carb snack before bed. Add 3-5g L-tryptophan at night.
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