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The Four Types of Vitamin B12 Each form of Vitamin B12 has distinct characteristics, making it ideal for various uses and absorption needs
It is not approved for therapeutic use in humans, and no large-scale clinical trials have been conducted to evaluate its safety or efficacy as a medication
Nicotinamide N-methyltransferase (NNMT) is a cytosolic enzyme that catalyzes the methylation of nicotinamide using S-adenosylmethionine (SAM) as a methyl donor, producing 1-methylnicotinamide (1-MNA) and S-adenosylhomocysteine (SAH)
This timeframe allows assessment of individual response, opportunity to adjust dosing, and generation of meaningful results without committing to an extended protocol
Last reviewed: May 31, 2026 Last updated: May 31, 2026 Written by: Jay Hastings, CEO of PlexusDx Jay Hastings is the CEO of PlexusDx, a precision health company focused on genetic testing, blood biomarker insights, and personalized wellness recommendations
One final point before we move on to questions and answers
