why do you need b12 injections Vitamin Injection Feeling worse after B12 Injection:

Exocrine pancreatic insufficiency (EPI) prevents animals from being able digest and absorb the nutrients from food, due to lack of digestive enzymes in the pancreas

Individuals who have had gastrointestinal surgery, such as weight loss surgery, may also have fewer cells through which to secrete stomach acid and intrinsic factor, inhibiting B12 absorption

Half-life Not established in humans no published human pharmacokinetic study exists

Please consult your veterinarian if you have any questions

Conclusion Vitamin B12 injections are key for treating deficiency

Its best to check with your insurance to see if you can get coverage