can b12 injections cause fever Why do I feel worse after a injection? Hassan - There Is No

Avoid administration immediately after meals, particularly high-carbohydrate meals

Gut surgery, pancreatic insufficiency, small intestinal bacterial overgrowth (SIBO), parasite infections, and certain autoimmune disorders are considered additional risk factors

People on vegan or strict plant-based diets need a reliable source from fortified foods (nutritional yeast, fortified plant milks, certain breakfast cereals) or a supplement

Gastric surgery or bowel resection that has removed the part of the gut where B12 is absorbed

It can help convert proteins, fats and carbohydrates into energy and is necessary for healthy skin and eyes

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