b12 subcutaneous injection video Vitamin C and Techniques How to Give Yourself A

A 2021 review of 16 randomized trials found B12 does not reliably reduce fatigue in people who are not deficient

For that group, treating the deficiency is important, because an untreated deficiency does not stay still

References Heffernan M, Summers RJ, Thorburn A, Ogru E, Gianello R, Jiang WJ, Ng FM

Verification with serum methylmalonic acid and/or serum homocysteine level may be necessary in asymptomatic patients with high-risk conditions, symptomatic patients with low-normal levels of vitamin B 12 (200 to 350 pg per mL), or symptomatic patients in whom vitamin B 12 deficiency is unlikely but must be excluded

AHK-Cu keeps them inactive