does a b12 injection work straight away How Quickly Shot Work? What to Expect Vitamin B12 shots: Uses, benefits,

Why- Weight loss surgery The most common weight loss surgery is "gastric bypass" After the surgery, food bypasses parts of your stomach and small intestine usually where B12 breaks down into usable form

References Park, H

(1) Groups at Risk of a Potential Vitamin B12 Deficiency Some people are at a higher risk for B12 deficiency, including those who: Have celiac disease, Crohns disease (a gastrointestinal disorder that can impact B12 absorption), or HIV Regularly take antacids, proton pump inhibitors, or other gastric acid inhibitors (these medications reduce gastric acid secretion and can interfere with vitamin B12 absorption, increasing deficiency risk) Follow vegan diets (vegan diets lack sufficient vitamin B12 sources, as B12 is mainly found in animal products) Are exclusively breastfed infants of women on vegan diets (these infants are at risk of B12 deficiency due to low maternal B12 intake)

Multiple compounds targeting the same pathways may cause excessive stimulation or unpredictable interactions