This is the main reason why celebrities like Charlize Theron, Justin Timberlake and even Madonna are getting vitamin B12 injections regularly
Mood improvement: B12 plays a role in producing neurotransmitters that regulate mood, so correcting a deficiency can help alleviate feelings of depression or anxiety that you might not have realized were connected to your B12 status
When theyre low, or hovering at the low end of normal for a person with a demanding lifestyle, the cracks show up as fatigue, brain fog, reduced focus, mood shifts, and decreased exercise tolerance
No human clinical trials exist
An enzyme called NNMT (nicotinamide N-methyltransferase) drains the NAD+ salvage pathway by methylating nicotinamide, one of NAD+'s precursors