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Is It Good Or Is It Bad

PMC 5333585

The NIH Office of Dietary Supplements, citing Institute of Medicine recommendations, advises that it is advisable for those older than 50 years to meet their RDA mainly by consuming foods fortified with vitamin B12 or a supplement containing vitamin B12. This recommendation reflects the fact that 10 to 30% of older adults lose the ability to efficiently absorb naturally occurring B12 from food

Each 500 mcg dose equals 20 units

SIRT1 is part of a family of proteins called sirtuins, known as longevity genes. It uses NAD+ as a fuel source to repair DNA, reduce inflammation, and improve stress resistance