muscle twitching after b12 injections Mike O'Hearn -Should You Inject | MUST WATCH Eye Twitching - Causes, Symptoms

A translational review on NNMT inhibitor clinical development ( Emerging opportunities for NNMT inhibitor clinical translation , ScienceDirect, 2026) points out that alternative routes like polyamine biosynthesis could compensate for the raised SAM, and that partial rather than total inhibition might even be preferable specifically to avoid triggering those compensatory mechanisms from a chronically imbalanced SAM/SAH ratio

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JCI Insight 3(12):e91980

Injections are often the recommended treatment when: You have been diagnosed with pernicious anemia or another condition that impairs B12 absorption

Improved mood and memory Although several studies show a link between depression and low B12 levels, there's no evidence that increasing the levels of B12 can help ease depression symptoms