pain in injection site b12 How to Give a Injection: Step-By-Step Instructions What Happens If You Inject
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Youve identified the core issues with remarkable clarity

Most B12 in the UK is injected into muscle, but the fatty subcutaneous route is a recognised alternative

True, if the roles were reversed your cat wouldn't do the same for you but that's only because they don't have fingers

B-12 Injections FAQs That depends on your body and why you are deficient
Always consult literature relevant to your specific animal model