extreme fatigue after b12 injection Why Do I Feel Worse My B12 Injections | Energy &

B12 plays a critical role in energy metabolism and the production of red blood cells, which are essential for delivering oxygen to your muscles

Its deficiency can lead to scurvy due to impaired collagen formation affecting bones, blood vessels and skin

Your internal levels peak

Exposure to heat, moisture, or light accelerates degradation

Current clinical-trial and FDA materials provide additional topical, compounding, and regulatory context [9] [10] [11] [12]

Serum B12 reference ranges vary between laboratories, but generally, levels below 148 pmol/L are considered deficient, whilst levels between 148258 pmol/L are regarded as borderline and may warrant further investigation or a trial of treatment, particularly if symptoms are present