This seems to be a good quality NMN blend so far.- Capsules are easy to swallow- No odd aftertaste or ill effects- Price is HIGH, even for NMN (only 150mg per capsule)- 3rd Party lab tested with COA postedI haven't had any problem taking these and they seem to be quit good quality, but I'm only giving 4 stars since the price is significantly higher than similar NMN products.**My only cautionary note is regarding the inclusion of Black Pepper Extract / Piperine. If you take ANY other supplements with Piperine included, be very, very careful you do not exceed 15-20mg of Piperine a day. There's been a big bandwagon of supplement makers including Piperine in their products to "increase absorption." But this added Piperine everywhere causes a potentially harmful cumulative effect. If everyone puts this in their products, you end up getting far too much daily Piperine cumulatively (which should never exceed more than 15-20mg a day). Secondly, Piperine is *not* necessarily healthy, only GRAS (generally recognized as safe). It actually irritates the stomach and destroys gastric epithelial cells, and it's a potent gut irritant potentially causing gut permeability, even in smaller doses. Piperine also causes a potentially dangerous increase in calcium concentration. And despite being touted for its ability to increase bioavailability, it actually *reduces* absorption of Beta-carotene and Vitamin E and can cause a loss of potassium. This is really NOT something that should be added to ANY supplements. It should be left to the consumer to buy and take separately if they want to try it. So if you use any supps with added Piperine (like these capsules), keep a very close eye on your total daily Piperine intake and try to keep it under 20mg a day.This is essentially just another NMN supplement. There is only a very small amount of quercetin and piperine in this - and nowhere near enough to have any effect. Each 2 capsule serving provides 300mg NMN, 25mg quercetin phytosome, and 5mg piperine. Most importantly - I can't find any evidence to support their claim of 40% more NAD+ than NMN alone..The 300mg NMN is good, and enough to provide a boost to your NAD+ levels. But the 25mg quercetin phytosome is not nearly enough to have any effects. Quercetin phytosome is generally taken at a dosage of 500mg per day, so this product contains just 1/20 of a standard dose of quercetin phytosome. Likewise, it only has a small amount of piperine, 5mg - and there is zero evidence that piperine has any effect on the bioavailability of either NMN or quercetin.Thoughts:It's a high quality, 3rd party lab tested NMN supplement - but that's all it is. It's no different than any other NMN supplement, and the Quercefit + Piperine aren't present in large enough quantities nor do they affect bioavailability. The 300mg NMN per serving dosage is pretty typical, but a bit lower than I would like. Some NMN supplements contain 500mg or more, and research seems to indicate that higher doses of NMN result in a greater boost in NAD+, so I try and take 500-1000mg per day.NMN can be quite expensive and finding a good value deal can be hard to come by. The price of this is quite competitive considering the length of usage it provides. Quality so far you can feel it consistent to others I’ve tried before.I consume NMN supplements as part of my anti-aging/longevity regimen. Included in my program is Quercetin with Bromelain (Bromelain acts synergistically, boosting the bio-absorption of Quercetin). So, I do like that this supplement offers some Quercetin Phytosome (Quercetin combined with phospholipids from Sunflower; Quercetin absorption boosted when ingested with some fats/lipids, and Sunflower lipids being a healthy element).The suggested serving size is 2 capsules, which yields 300mg NMN and 25mg Quercetin Phytosome. This is an ample dose of NMN. Each bottle then contains 30 servings, with the 2 pack supplying 60 servings (total 120 capsules).With 12.5mg Quercetin Phytomoe per capsule, which is a complex of 5mg Quercetin combined with Sunflower phospholipids (the phospholipids enhances the bioavailability and bioabsorption of the Quercetin). 2.5mg of Black Pepper Extract per capsule, standardized to 95% Peperine is included to facilitate bioavailability and bio-absorption of NMN and the Quercetin Phytosome.The product details states: “3rd party Lab Tested in the USA: We have our own FDA registered Food-Grade facility in the USA. All our products are 3rd-Party tested to guarantee purity.” This is a very impressive statement. I searched the product label for 3rd Party Lab Tested and FDA registered facility and couldn’t find any badge or text regarding this aspect. It does have GMP certification, though. The GMP, Good Manufacturing Practice, does satisfy quality assurance concerns, checking off an important box.Additionally, I appreciate that they show their Certificate of Analysis in the product details.At a cost of $85, it is a bit pricey for the product niche. It’s a bit more expensive than some name brand NMN supplement, albeit without the Quercetin Phytosome. However, in consideration as a NMN supplement, and with only 12.5mg Quercetin Phytosome (5mg Quercetin), the comparison only regards the NMN aspect. (So, for example, one bottle with same 300mg NMN, 30 serving/60 capsules, for $32.67 - $36.30: https://www.amazon.com/dp/B07N8HWDMP/)Based on these observations, I do find this to be an impressive NMN supplement, offering and additional Quercetin Phytosome and Peperine. It receives a 4.5 star rating.