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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
You can find further information on vitamin B12, the other micronutrients from the vitamin B group, and deficiencies, in the health field - Vitamin B deficiency
Some protocols add a growth-hormone peptide like CJC-1295/Ipamorelin for active adults who want sleep and body-composition benefits alongside recovery
578 Another group of researchers found that lifetime total costs were three times higher for women compared with men living with Alzheimer's dementia, due to women having a longer duration of illness and spending more time in a nursing home