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8) Are there side effects

Hi all, I am a 21 y/o male who eats meat and was diagnosed with a B12 deficiency (not PA) about 2 months ago

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Summary: Feeling worse after a B12 injection typically reflects your body adjusting to replenished vitamin levels, triggering metabolic processes that may temporarily cause fatigue, headaches, or injection site discomfort

The science behind this pairing is not complicated once you understand how each compound works independently, and this guide breaks down everything you need to know about combining them safely, timing your doses correctly, and understanding what realistic results actually look like