This can impact training motivation and performance
That said, if you're taking higher doses (15g+ daily), its smart to: Monitor digestive response Reassess needs every 812 weeks Consider lab work if taking with other supplements long-term Even high-dose glutamine supplementation has been shown to be safe for up to 6 weeks, with no adverse effects in trained subjects. Antonio, Journal of Strength and Conditioning Research Stack Timing: What to Combine LGlutamine With
For instance, alcohol inhibits nutrient absorption, especially for B vitamins
Studies showed that p.N410I, p.L413V, and p.N410T, three gene mutations in exon 10, can increase the activity of GDH (about twice the normal value) [13, 14]
Some research has shown that consuming whey protein may support increased glutathione
This is the 'Wild West' of supplements and peptides