oral b12 vs injection Should You Take Natural vs. Synthetic B12? Vitamin B12 Injections vs. Supplements:
Description
Optimal results require 8-12 weeks of consistent use combined with appropriate nutrition and exercise

I've never been a huge fan of wasting things unnecessarily, so if the latter was possible, that would always be great news

The subcutaneous route is still used, and it has some practical advantages

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This means that hydroxycobalamin stays in the body for longer periods of time and can provide sustained levels of vitamin B12, which may be beneficial for individuals with severe or chronic vitamin B12 deficiency
