If you are weighing B12 injections against oral supplements, the right choice depends less on which method is "stronger" and more on your body, your diet, and whether you actually have a deficiency
What is the best injection site for intramuscular (IM) B12 injections?
It is essential to seek medical attention if you suspect you have vitamin B12 deficiency to prevent these health problems
How Your Body Handles Vitamin B12 Your body needs to have a properly functioning pancreas, an unharmed stomach and intestines, and adequate levels of intrinsic factor, a protein that binds to vitamin B12 in the stomachonly then will you be able to absorb vitamin B12 as efficiently as possible
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Despite these results, the development of AOD-9604 stopped in 2007