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Adults need around 2.4 micrograms (mcg) of vitamin B12 a day, and women who are pregnant or breastfeeding need more

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Declining NAD+ impairs energy, metabolism, skin health, and immunity, accelerating biological aging.[12][13] Research indicates that this loop can be interrupted by boosting NAD+, potentially reversing aspects of biological age as measured by epigenetic clocks

After that, they need a shot every month

Vitamin B12 injections - FAQs

During winter months, when natural light exposure decreases, many people experience disruptions in serotonin production that contribute to SAD symptoms