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It is a coenzyme produced in all living cells and has been labeled an anti-aging molecule because of the essential roles it plays in promoting health, prolonging lifespan, and controlling aging

B12 injections may also be useful for those with gastrointestinal issues, older adults, vegans, vegetarians, and people with underlying health conditions that can restrict vitamin B12 absorption

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However, it is an INCI-listed cosmetic ingredient widely used in skincare formulations