L-Glutamine Side Effects

I apparently have an uncommon but known side effect from L-Glutamine, and my MO told me today to stop taking it altogether. It causes an intense burning sensation with urination -- feels like strong acid. On a 1-10 pain scale, I rated it as a 9. I can also see the powder in my urine - completely unmetabolized.

She said that unless I could take the full 30 grams daily, there was no point in taking it at all. Does anyone know where the science is behind this recommendation? How did they arrive at that dosage? Has anyone tested the effectiveness of smaller doses? I'm wondering because my husband suggested that instead of eliminating it, I could start with tiny amounts and work up until I find a level I can tolerate and stick with that? Or perhaps I could aim for the full dose for the day of chemo and maybe one or two after, and then spend the rest of the week flushing it out of my system? It would mean living with the pain for a few days. However, I have no idea if the pain means damage is being done or if it's more like eating a hot pepper.

I'm a very petite person, and the side effect is associated with EXCESS L-Glutamine. Another reason I wonder about the dosage.

Has anyone else experienced this side effect? If so, what did you do? Does anyone know of a way to mitigate the pain?

I'm also icing fingers and toes during the infusion (Taxol/Carboplatin -- both notorious for causing neuropathy) and taking 200 mg B6 daily. For some reason, my MO didn't recommend additional B12. My multi contains 50 mcg, but possibly the wrong type (cyanocobalamin). That's my entire arsenal against neuropathy. Haven't experienced any yet, but have only completed 3 weekly rounds so far.

Thank you, brave sisters, for any ideas.