Your overall health, nutritional status, and sleep quality all affect healing capacity
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If needles aren't for you, the pill clearly has the advantage, but it does mean taking it on an empty stomach each morning and waiting 30 minutes before taking other medication and eating or drinking anything else
Olasupo Odunsi, MD, Medical Director Reviewed July 5, 2026 If you're constantly tired and your metabolism feels stuck, low B12 could be part of the problem
The neuropsychiatry of vitamin B12 deficiency in elderly patients
Certain populations are at higher risk of vitamin B12 deficiency, including older adults (due to reduced gastric acid production), individuals following strict vegan or vegetarian diets, those with pernicious anaemia (an autoimmune condition affecting intrinsic factor production), patients who have undergone gastric or ileal surgery (including bariatric procedures), and those taking medications that affect gastric acid secretion (such as proton pump inhibitors or H2 antagonists) or intestinal absorption (including metformin)
