They have also been known to increase concentration, memory, and energy levels, support weight loss by improving metabolism, help boost the immune system, have been shown to improve sleep and can help stop some types of hair loss
Studies in multiple model organisms have demonstrated that this age-related NAD+ decline correlates with mitochondrial dysfunction, impaired DNA repair capacity, and the onset of numerous age-associated pathologies
They might not absorb it as well
The injected growth factors and peptides stimulate inactive or newly-implanted hair follicles to enter a new active growth phase, causing the hair to start growing again
If you are concerned about acne whilst taking B12, consult your GP rather than stopping treatment independently, particularly if the supplement addresses a documented deficiency