how long b12 injection to work quickly does a This Is How It Takes For A Vitamin How Quickly Does B12 Shot

Timeline: taking PPIs for two or more years significantly increases deficiency risk

The resulting force of the water coming out of the smaller one will be greater than the larger one, thus a smaller gauge needle has a higher risk of causing damage to the soft tissue leading to possible pain and tenderness at the site

But injections give a much bigger dose

Conditions like pernicious anaemia (an autoimmune condition affecting a protein called intrinsic factor vital for B12 absorption), stomach issues (such as from reduced stomach acid or certain medications like proton pump inhibitors), intestinal disorders (like Crohns disease or coeliac disease), or even surgical removal of parts of the small intestine (e.g., gastric bypass surgery) can prevent proper absorption