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No human clinical trials have been published
McReynolds MR, et al
L-Carnitine may be ideal if you: Are actively working on weight loss or body composition Experience low energy, fatigue, or sluggish metabolism Want to support athletic performance or recovery Are optimizing for heart health, mitochondrial function , or healthy aging Its safe for both men and women and often used alongside other metabolic or longevity therapies
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NNMT is an enzyme that methylates nicotinamide, a key NAD+ precursor, depleting cellular methyl donor pools and influencing both NAD+ availability and broader methylation pathways
