1000 mcg b12 injection daily Optimal Vitamin Dosage and Treating Deficiency made form of vitamin B12 Vitamin B12 Shots: Uses, Intake
Description
These studies suggest that strategies combining NAD + boosting with inhibitors of NAD + -consuming enzymes could be a promising approach to mitigate axon degeneration

Several inhibitors of CD38 already exist or are in development, a few of which enhance NAD + levels in vivo

The process is fast, comfortable, and performed by trained professionals at The Shine Spa
Not sure where I'd buy that in UK