This is not pure NMN. The substance is yellowish and has sand-like consistency. Not fluffy white. The weight is twice the weight of pure NMN for a scoop. The taste still has some bitterness like pure NMN and that is why I am giving it two stars, but it has been diluted a lot. I liked Nutricost a lot and I buy their other products, but this cutting corners is huge problem for me.Why do I take it?I don’t know what my biological age is and if NMN has really helped me turn the clock backwards, someday we will live in the world where test like these are fairly cheap and have cheaper options to monitor all sorts of things, but for now I take NMN for the same reason most people, there have been some good studies that this helps aid with longevity/anti-aging. A lot of people claim increase in energy and also just better overall well-being. There is plenty of information on the internet on NMN so do your research and always consult with your physician.What benefits have I noticed?A little back ground on me, I am 45, I work out 6 to 7 times a week and do a mixture of weight lifting, cardio and circuit training. I have a better diet than the average person but still a long way to go to say my diet is great. I am in good shape and have been in good shape for a long time, so I can’t really say I feel much of a difference on this supplement, maybe a bit more energy on the end of my runs but mostly I trust the studies and if this is helping with slowing aging, I am on board.CostI am hoping in the future NMN lowers in price as its manufactured more, but for now it’s a pretty expensive supplement to add to your daily intake and here are some numbers to considerFor this container there is 50g and each serving is 1g, 250mg for most studies I’ve seen the minimum dose so if you take this amount this container will last you 200 daysI have heard a lot of recommendations for 1000mg daily (and this products recommendation) which would mean this container is a 50 day supplySome people take 2000mg daily which now you’re talking only a 25 day supplyPersonally for my age I am taking 500mg so this container is a 100 day supply, taking this amount also adds up to a pretty big savings each month vs taking a 1000mg daily but until I can properly monitor my levels I am not sure if I should be taking more or possible even less.Other things to ConsiderWhen taking NMN you should take another supplement to enhance the bioabsorption… Resveratrol and pterostilbene are popular choicesI like to take NMN and actually prefer the pure powder to swallowing multiple capsules filled with magnesium stearate. The Vitacost brand is well known and reliable. There are many servings in this container. Most people don't need to take the recommended 1g per day for good effects. There are several other brands of pure NMN powder, and this compares favorably in quality and price.NMN stands for Nicotinamide Mononucleotide to support cellular vitality. The Nutricost brand is well priced compared to many at $2 per daily scoop. But is it also effective in energy production, and brain health? NMN along with Nicotinamide Riboside are gaining attention for a myriad of claimed health benefits including raising NAD + levels. One human trial was published just this year showing an NAD + level increase while also demonstrating the need for additional research.As with any supplementation, it’s wise to check with your physician first. Lastly, the 30 day free return guarantee is confidence inducing.Good powder, blends well, very lively...Jar was pretty much full, which is A LOT of NMN. Good product, no ill effects on my stomach or well being. Pricey total but broken down per serving it's not bad.