Here it's worth separating combinations with actual human trial data from combinations that are mechanistically plausible but untested.
Pterostilbene (a resveratrol analog) — the best-studied pairing. This is the combination with real trial evidence behind it. Pterostilbene is structurally similar to resveratrol but has higher bioavailability due to two methoxy groups, which is largely why formulators favor it over resveratrol itself. The commercial NR+pterostilbene product has been tested in a randomized, double-blind, placebo-controlled trial of 120 adults aged 60–80 across three arms (placebo, 250 mg NR + 50 mg pterostilbene, and double that dose) over 8 weeks. Separate research has tested 1,000 mg NR plus 200 mg pterostilbene in older adults for muscle regeneration after induced injury; the combination was well tolerated, though it didn't demonstrate improved muscle stem cell recruitment. A pilot study of the same combination in ALS patients reported slowed disease progression relative to placebo, and larger follow-up trials have been conducted.
The rationale: NR supplies NAD+, and sirtuins (which pterostilbene and resveratrol are thought to activate) are the NAD+-consuming enzymes that actually do the downstream work. Supplying fuel plus activating the machinery that uses it is a coherent theory — though it's worth noting the muscle-injury trial shows the theory doesn't automatically translate into every measurable outcome.
Resveratrol itself is the more commonly sold pairing but the weaker choice on bioavailability grounds. Interestingly, animal work on formulation found that delivering NR and resveratrol together in a specially engineered form raised serum NAD+ far more than NR alone or a simple NR + resveratrol mixture — suggesting that how they're combined may matter as much as whether they're combined.
B vitamins make sense as a background, not as a booster. NAD+ synthesis pathways don't operate in isolation; related B vitamins support the broader metabolic enzymes involved. There's no strong human trial evidence that adding a B-complex amplifies NR's effect specifically — think of it as ensuring no cofactor is limiting rather than as a synergistic stack.
Benfotiamine (a fat-soluble thiamine derivative) is the most speculative of the three. It's studied primarily for diabetic neuropathy and glucose-metabolism endpoints, and it's been investigated in Alzheimer's research alongside NAD+-related approaches, but there is no published human trial testing benfotiamine combined with NR. The pairing is plausible on paper — both touch mitochondrial energy metabolism — but calling it "proven synergy" would be overstating things considerably.
Practical framing: if you want the combination with actual trial data behind it, NR + pterostilbene is the one. Everything else in this space is reasonable theory awaiting evidence.
Sources for this question:
- JCI Insight, "A randomized placebo-controlled trial of nicotinamide riboside and pterostilbene supplementation in experimental muscle injury in elderly individuals" — https://pmc.ncbi.nlm.nih.gov/articles/PMC9675477/
- medRxiv preprint of the same NRPT muscle trial — https://www.medrxiv.org/content/10.1101/2021.10.04.21264504.full.pdf
- ALZFORUM, "Nicotinamide Riboside" (NR+pterostilbene ALS trial history) — https://www.alzforum.org/therapeutics/nicotinamide-riboside
- NMN.com, "A Combination Treatment Has Promising Effects In ALS Patients" (EH301 pilot) — https://www.nmn.com/news/nicotinamide-riboside-pterostilbene-effects-als
- PMC, "Oral delivery of carrier-free dual-drug nanocrystal self-assembled microspheres improved NAD+ bioavailability" (NR/resveratrol formulation) — https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7899691/
- US Patent 12128060, describing the 120-participant NR+pterostilbene RCT design — https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12128060
0 comments