The medications most commonly associated with B12 deficiencies include metformin (diabetes), antacids, anti-ulcers, blood pressure, cholesterol meds, and birth control pills (12, 13)
A 750 mg single 3-hour infusion has been reported to raise blood NAD+ ~398% over baseline in published pilot work
Reconstituted peptides present a completely different stability profile
At clinical doses under supervision, the most common side effects are mild nausea in the first week (typically resolves by day 7 to 10), injection site reactions (redness, minor swelling, localized soreness lasting 24 hours), and occasional transient fatigue or mild headache in the first few days
It's throwing darts in the dark and hoping one hits the board