NAD is essential for: Mitochondrial energy production it serves as a coenzyme in the electron transport chain, driving ATP synthesis
The therapy does not substitute for things I know work
For more information, see Vitamin B12 and Cyanide
Best vitamin B12 supplements at a glance Capsules Best high-strength vitamin B12: Dr Vegan Vitamin B12, 9.99 Best vitamin B12 capsule for vegans: Viridian High Potency B12 capsules, 13.30 Runner-up vitamin B12 capsule for vegans: Wild Nutrition Food Grown Vitamin B12 Plus, 15 Best tasteless vitamin B12 capsule: Zooki Vitamin B12 capsules, 39.99 Tablets Best vitamin B12 supplement: ZipVit vitamin B12 1000mcg, 7.49 Best value vitamin B12: Vitabright Dual Active B12 1000mcg, 5.99 Best budget vitamin B12: Holland & Barrett Slow-Release Vitamin B12 1000mcg, 16.49 Liquids Best overall vitamin B12: Viridian Liquid B12, 18.65 Best vitamin B12 for on the move: Zooki Vitamin B12 Strawberry, 49.99 Oral Sprays Best vitamin B12 for digestive issues: BetterYou Boost 1200mcg B12 Daily Oral Spray, 8.53 Jump to section: Best vitamin B12 supplements to buy in 2026 Why do we need vitamin B12

Advanced insulin resistance, mitochondrial damage from chronic oxidative stress, or inflammatory states can create barriers to AMPK activation and NAD+ utilization that require co-interventions (caloric restriction, anti-inflammatory compounds, or antioxidant support)
A common starting point is 1 mL (100 units on an insulin syringe)