Form Comparison

NMN vs Oral NAD+

How NMN and oral NAD+ differ in potency, absorption, tolerance, and cost.

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Quick verdict. Choose NMN. Human trials show NMN at 250-1,000 mg raises blood NAD+ metabolites, while oral NAD+ is largely digested to nicotinamide and sublingual products have no published human pharmacokinetics. If NMN's price is the obstacle, nicotinamide gets you much of the same precursor for far less.

Side by Side

Nicotinamide Mononucleotide (NMN) NAD+ (Oral or Sublingual)
Absorption Variable Low
How it is absorbed Absorbed in the small intestine, possibly after conversion to NR; a dedicated NMN transporter reported in mouse gut is disputed. 250-1,000 mg daily raised blood NAD+ metabolites in human trials. Largely broken down in the gut to nicotinamide and other small precursors before absorption. Sublingual absorption claims lack published human pharmacokinetics.
Typical dose 250-1,000 mg daily Per product
Common uses NAD+ support, metabolic health (research) marketed for energy
Side effects None consistent in short trials. None reported at supplement doses.
Cost High High
Also called NMN, beta-NMN NAD, NADH

When to Choose Nicotinamide Mononucleotide (NMN)

Choose NMN when you want the precursor closest to NAD+ and accept the cost. One small trial found improved muscle insulin signaling in prediabetic women; most other endpoints have been null.

Nicotinamide Mononucleotide (NMN)

One small positive metabolic trial and many null endpoints. Expensive for what is known.

What to look for: 250-500 mg per capsule with a certificate of analysis from an independent lab.

Find on iHerb Affiliate link

When to Choose NAD+ (Oral or Sublingual)

There is rarely a reason to choose oral NAD+: NR or NMN are better documented. Paying for intact NAD+ buys nicotinamide after digestion.

NAD+ (Oral or Sublingual)

There is rarely a reason to choose oral NAD+: NR or NMN are better documented.

What to look for: NAD+ named on the Supplement Facts panel, with the amount per serving stated.

Find on iHerb Affiliate link

Products on Titrate

200 of the 214,745 labels in the NIH Dietary Supplement Label Database list NMN and NAD+ as an active ingredient (144 on market). 121 are sold as NMN and NAD+ products by name.

Open supplement search

NMN and NAD+ does not have its own search category yet. Each product above links to its full label in the NIH database.

Related

References

Chen AC, Martin AJ, Choy B, et al. A phase 3 randomized trial of nicotinamide for skin-cancer chemoprevention. N Engl J Med. 2015;373(17):1618-1626.

Trammell SA, Schmidt MS, Weidemann BJ, et al. Nicotinamide riboside is uniquely and orally bioavailable in mice and humans. Nat Commun. 2016;7:12948.

Martens CR, Denman BA, Mazzo MR, et al. Chronic nicotinamide riboside supplementation is well-tolerated and elevates NAD+ in healthy middle-aged and older adults. Nat Commun. 2018;9(1):1286.

Dollerup OL, Christensen B, Svart M, et al. A randomized placebo-controlled clinical trial of nicotinamide riboside in obese men: safety, insulin-sensitivity, and lipid-mobilizing effects. Am J Clin Nutr. 2018;108(2):343-353.

Yoshino M, Yoshino J, Kayser BD, et al. Nicotinamide mononucleotide increases muscle insulin sensitivity in prediabetic women. Science. 2021;372(6547):1224-1229.

Pencina KM, Lavu S, Dos Santos M, et al. MIB-626, an oral formulation of a microcrystalline unique polymorph of beta-nicotinamide mononucleotide, increases circulating nicotinamide adenine dinucleotide and its metabolome in middle-aged and older adults. J Gerontol A Biol Sci Med Sci. 2023;78(1):90-96.