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Vitamin B12 is mainly available in animal foods like meat, fish, eggs, dairy products, and nutritional yeast
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NNMT inhibitors are selective and do not impact related methyltransferases or enzymes in the NAD + salvage pathway The selectivity of NNMT inhibitors was confirmed by testing against a panel of structurally similar methyltransferases and two enzymes in the NAD + salvage pathway (NAMPT and SIRT1

Best NAD+ Supplement for Men: Nutricost NAD+ Nutricost NAD+ Our thoughts: We like this easy to swallow, high potency NAD+ NAD per serving: 1,000 mg Serving size: 2 capsules Who its for: Folks looking for a straightforward, simple NAD+ formula What makes it different: Manufactured in an NSF Certified, GMP compliant, and FDA registered facility Pros High potency per serving No artificial additives or fillers Vegan and gluten-free Cons Difficult to find in stores No complementary ingredients for synergistic benefits More expensive than some other options on our list Our Thoughts on Nutricost NAD+ Nutricost NAD+ is our pick for the best NAD+ supplement for men because it has a straightforward, minimalist formula and effective dosage of 1,000 milligrams per serving