The Best NAD+ Supplements, According to the Research
NAD+ supplements now sit on the same shelf as fish oil and magnesium, and their labels promise a lot. The research behind them is real. It also answers a narrower question than most of that packaging suggests.
If you're in your 40s and wondering whether a NAD+ product belongs next to your protein powder, start with what human trials have measured. Then hold every bottle to the same checklist.
What NAD+ Is and Why Supplements Use Precursors
NAD+ (nicotinamide adenine dinucleotide) is a coenzyme present in every cell you have. Your body uses it to turn food into cellular energy, and the enzymes that keep DNA in good repair depend on it. Levels drop as you get older, and that drop is the premise of the whole category.
That decline is better documented in some places than others. A 2025 review in Nature Metabolism concluded the evidence is strongest when researchers measure specific tissues, and called for more targeted clinical work.
Most products don't contain NAD+ itself. They contain a NAD+ precursor, a building block your cells convert into NAD+. The two you'll see on labels are NR (nicotinamide riboside) and NMN (nicotinamide mononucleotide), which sit one step apart on the same pathway.
What Human Studies Have Measured So Far
The clearest result is a blood test. In a randomized, double-blind, placebo-controlled trial of an NR-and-pterostilbene formula, 120 adults ages 60 to 80 took the combination daily. The recommended daily dose increased whole-blood NAD+ by an average of 40% after 30 days and safely sustained that increase through the end of the study.
NMN has a comparable result. In a randomized, double-blind, placebo-controlled trial of healthy adults, participants taking 250 milligrams of NMN daily had 40% higher whole-blood NAD+ levels than those taking placebo after four weeks.
Muscle is where results get mixed. In a study of 12 older men, 1,000 milligrams of NR daily for 21 days changed NAD+-related compounds in muscle, but mitochondrial respiration did not improve.
A seven-day study in eight healthy young men used the same daily dose. Some NAD+-related metabolites in muscle shifted, yet muscle NAD+ itself did not rise, and markers of fuel use and endurance adaptation stayed flat.
Recovery data looks similar. In an industry-funded randomized trial, 32 adults ages 55 to 80 took 1,000 milligrams of NR and 200 milligrams of pterostilbene daily after an experimentally induced muscle injury. Blood NAD+ went up. Muscle stem-cell recruitment, regeneration, and strength recovery did not improve.
Across these trials, NAD+ precursors raised NAD+ in the blood. None of them showed that the higher number made healthy people feel more energetic or recover faster from a hard workout.
How to Compare NAD+ Supplements
Five questions separate one bottle from the next:
● Which precursor, and how much: NR or NMN, and the milligrams per serving printed on the label.
● What else is in it: some formulas pair the precursor with pterostilbene, resveratrol, or TMG (trimethylglycine).
● Whose data: a trial on the finished formula carries more weight than research on one of its ingredients.
● Third-party testing: NSF Certified for Sport means finished batches are screened for contaminants and substances banned in sport.
● Cost per serving: divide the price by the number of daily doses in the container.
Five NAD+ Supplements Compared
These are listed by precursor and formula, so the numbering isn't a ranking.
1. Basis (NR + Pterostilbene)
Elysium Health makes Basis, the formula behind the 120-person trial above. It combines NR with pterostilbene, a plant compound closely related to resveratrol, to support cellular energy and healthy DNA.
In that trial, the recommended dose raised whole-blood NAD+ by an average of 40%. The manufacturer funded the study, and what it measured was NAD+ levels and safety, so read it as a biomarker result rather than an outcome. Basis is NSF Certified for Sport and independently tested for quality and purity. The routine is two capsules each morning.
2. Signal (NMN + SIRT3 Support)
Signal is the NMN option from the same company. It pairs NMN with a SIRT3 Activation Complex, a blend of honokiol and viniferin meant to support mitochondrial health and cellular metabolism. Each serving has 250 milligrams of NMN and 150 milligrams of that complex.
Its evidence is ingredient-level: the NMN trial above used the same 250 milligram daily dose, but Signal hasn't been tested as a finished formula. It is also NSF Certified for Sport and independently tested for quality and purity.
3. Tru Niagen
Tru Niagen is about as simple as the category gets. Each capsule holds 300 milligrams of nicotinamide riboside chloride, sold under the ingredient name Niagen, with nothing else active in the formula.
That makes it easy to know exactly what you're taking. If you want NR alone, without a second compound in the mix, this is the baseline to compare everything else against. Niagen also shows up as the NR source in other brands' products, including the Life Extension formula below.
4. Thorne NiaCel 400
NiaCel 400 carries the highest NR dose on this list, 400 milligrams in a single capsule, and adds TMG. Thorne lists it as NSF Certified for Sport, which matters if you compete in a tested sport or simply want a batch-level check.
A higher dose isn't automatically a better one. The trials above don't show that 400 milligrams does more for you than 300, so treat the number as a cost question as much as an efficacy one.
5. Life Extension NAD+ Cell Regenerator and Resveratrol Elite
This one pairs 300 milligrams of Niagen NR with 10 milligrams of trans-resveratrol, plus small amounts of quercetin (5 milligrams) and fisetin (0.4 milligrams). It's one capsule a day, with 30 per bottle.
Read the add-on amounts closely, since the resveratrol, quercetin, and fisetin each come in single-digit milligrams. The NR dose is the part of this formula that lines up with published human research.
A Note on NMN-Only Brands
Standalone NMN capsules and powders went through a regulatory gray zone. In letters dated September 29, 2025, the FDA confirmed NMN is not excluded from the definition of a dietary supplement, reversing its earlier position. Quality across NMN-only brands still varies, so ask for a certificate of analysis or look for third-party certification.
Training and Sleep Still Come First
Exercise has its own NAD+ data. In a 10-week study of 16 middle-aged, overweight adults who hadn't trained before, resistance training raised NAD+ in their muscles and made them stronger.
Another study of 57 people found that 12 weeks of aerobic or resistance training increased NAMPT, an enzyme your muscles use to recycle NAD+, in both younger and older adults. A capsule complements your lifting sessions and your sleep schedule. It can't stand in for either one.
If you take prescription medication or manage a health condition, check with your doctor before adding a NAD+ supplement. That conversation matters more than which brand you pick.
Choosing a NAD+ Precursor You Can Verify
Pick a precursor first, NR or NMN, then compare the milligrams on the label against the doses used in trials. Favor products with NSF Certified for Sport or another third-party check, and products with human data on the formula itself.
Then set your expectations by what's been measured. A NAD+ supplement can raise the NAD+ level in your blood. Whether it changes your energy or your recovery is still unproven, and your training log will tell you more about both than any capsule.
