While B12 is involved in metabolism and energy production, there is limited evidence to support its use as a weight-loss aid alone
it can be taken as a pill or under the tongueis when there is a deficiency that can be caused by pernicious anemia, celiac or Crohns disease, or weight loss procedures such as gastric bypass surgery, which interferes with the bodys ability to extract vitamins from food
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Those with digestive issues, like Crohns disease or celiac disease, that impair nutrient absorption
B12 injections Intramuscular B12 bypasses the digestive system entirely
For others, with milder or temporary deficiencies, the initial shots might lead to longer periods of feeling well, potentially even allowing for a switch to oral supplements under strict medical guidance