GenuinePurity NMN provides 500 mg of NMN per 2-capsule serving. We review the human NMN evidence, the liposomal claim, the 97-day guarantee and the auto-renewing trial offer.
GenuinePurity NMN is our top pick among NMN supplements. It provides 500 mg of NMN per 2-capsule serving, a dose in the range used in human trials, where NMN reliably raised blood NAD+. Whether that translates into benefits people can feel is still unproven, the product itself hasn't been tested, and its "liposomal" absorption claim hasn't been shown in people.
NMN has a handful of small (about 10 to 110 people), short (2 to 12 week) placebo-controlled trials at 250 to 1,250 mg a day. They show NMN reliably raises blood NAD+. A few reported modest changes in muscle insulin sensitivity, walking distance or grip strength, but results are mixed and several trials were funded by NMN ingredient makers. No human study shows NMN slows aging.
The official page lists 250 mg of NMN (stated 96% purity) per capsule, with a 2-capsule, 500 mg serving and 30 servings per bottle; one third-party listing shows a 1-capsule serving, so check the label. The "liposomal" form uses sunflower lecithin and phosphatidylcholine; better absorption hasn't been shown in a human study of this product. GenuinePurity posts some lab certificates online.
The guarantee runs 97 days from delivery: returns must reach the warehouse within 97 days and cover the first two opened bottles plus any unopened ones; shipping isn't refunded. Note that the $19 first-bottle offer auto-renews at $49 every 30 days until you cancel.
NMN-H (reduced NMN, or NMNH) is a newer, less-studied form. Cell and mouse studies suggest it raises NAD+ more strongly, but we found no peer-reviewed human trial, and claims that it is more stable or better absorbed haven't been shown in people. Standard NMN has the human evidence, which is why GenuinePurity NMN is our top pick and NMN-H is an alternative for people who specifically want the newer form.