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By promoting healthy telomeres, vitamin B12 helps maintain oocyte health

Pregnant and breastfeeding individuals, those on anticoagulants or with bleeding disorders, and anyone with documented B12 toxicity (extremely rare) require provider consultation

B12 status does not directly influence most of those risks, which is why I have not covered them in depth here

B12 is an essential nutrient, and its deficiency is common, especially among individuals following restricted diets like vegetarianism or veganism, pregnant or breastfeeding women, older adults, those who have undergone gastrointestinal surgery or have gastrointestinal disorders, and people with an autoimmune condition known as pernicious anaemia