Andrew Huberman has discussed methylene blue on his podcast and the standards he raises are clear: USP purity, verified COA, precise dose. We ran 8 of the most-bought MB brands through those criteria.

8 nootropic supplements tested and compared for studying, exam prep, focus, and memory. Honest 2026 rankings with price per dose, purity grade, and third-party COA verification.

We tested 8 oxidative stress supplements across purity, mechanism, and price-per-dose. NooBlue methylene blue ranked #1 for mitochondrial-targeted antioxidant defense at $0.58/dose with USP-grade purity and third-party COA.