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Food Sources of Vitamin B12 One of the things we talk about in the vitamins that runners need is how to start with food first

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

A study in the Journal of Clinical Biochemistry says, Vitamin B12 deficiency can cause big problems with nerves and blood. Vitamin B12 is key for making DNA, fatty acids, and energy. Source: Journal of Clinical Biochemistry Common Signs of Deficiency A Vitamin B12 shortage can show in many ways, like: Fatigue and weakness Numbness or tingling in hands and feet Difficulty walking Mood changes, such as depression Spotting these signs early is key for quick action

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