Energy levels climb when deficiency is corrected Mental clarity improves if B12 was genuinely low Fat metabolism gets a boost with MIC compounds Sleep quality can stabilize Skin, hair, and nails benefit from better nutrient delivery Results vary wildly
Barney Bishop, and Monique L
Readers sometimes prefer a higher concentration to reduce injection volume, but the tradeoff in measurement accuracy is rarely worth it, especially for those new to subcutaneous injections
Our experience indicates that injections produce the most favorable outcomes among patients
Energy and exercise performance at their peak
A 2021 systematic review of 16 randomized controlled trials and 6,276 participants (Markun and colleagues, Effects of Vitamin B12 Supplementation on Cognitive Function, Depressive Symptoms, and Fatigue, Nutrients, 2021) found that B12 supplementation does not reliably reduce fatigue in people who are not deficient