B12 supplements are readily available in oral tablets, oral solutions, mouth sprays, and under-the-tongue tablets, and they range in dosage amounts from 5 mcg to 5,000 mcg depending on the type of supplement
Reusing the same spot leads to lumps, bruising, and slower absorption
For those with a B12 deficiency and an MTHFR mutation, one major advantage of B12 injections is that they are readily absorbed in the body and do not have to be taken as often as oral tablets
Andrea Maier, a professor of medicine at the National University of Singapore who runs the Chi Longevity Clinic at the Four Seasons there, said that the clinical evidence simply isn't there yet for a lot of these peptides
Alcohol & stress: Limit alcohol (its metabolism consumes NAD+) and manage stress, since chronic stress activates PARPs that deplete NAD+ pools