can b12 injections make you sick Vitamin Injections: Good or Bad? Vitamin B12 Injections Dosage and

Without sufficient B12, nerves become exposed and are easily damaged resulting in sensory and motor dysfunction

The active folate is immediately bioavailable, crossing the blood-brain barrier and entering the methylation cycle without requiring any enzymatic conversion, ensuring that even those with severe MTHFR mutations receive the full therapeutic benefit

They are complementary tools

Medical Intervention If your levels are very low, an IV drip or intramuscular shot of B12 or B complex can boost your levels quickly

Some individuals report a sensation of body swelling or warmth, but these symptoms typically resolve on their own within a few hours