Source: Examine.com — Glutamine — ~5 g/day for gut/immune support; not shown to build muscle in healthy trainees.
A conditionally essential amino acid that fuels the gut and immune cells.
Primary fuel for rapidly dividing gut and immune cells.
Very safe. The muscle-building claims are overblown for healthy trainees; the real value is gut/immune support under stress.
| Per serving | |
|---|---|
| Typical branded single-ingredient product | $0.50 |
| Bulk powder at the clinical dose (500g, $27.97) | $0.28 |
Buying bulk powder instead of a branded bottle saves about 44% per serving.
Bulk price: $27.97/500g →Educational only — not medical advice. Grades and clinical doses are computed from public labels against sourced research (citations on the main site); prices last verified 2026-07-21. Expensive Powder has no sponsors; bulk links may earn an affiliate commission, which never affects a grade. Talk to a clinician before starting any supplement.