I started taking nmn two months ago, I take four capsules a day (600mg) and have noticed an increase in energy, as well as shorter recovery periods between workouts. These effects were immediate upon beginning nmn, though dosage does seem to matter. There was almost no noticeable effects at taking just 150mg a day, but once I bumped it up to 600mg, I found that I was recovering from workouts, and even injuries, as fast I used to when I was in my late teens/early twenties. I've been tracking the number of grey/white hairs since I started nmn, but so far have seen no color change at the roots, but have noticed that no more white hair has grown in since I started taking nmn. I didn't expect to see a color change right away, but I'm hoping that somewhere around the six month mark to see that change; I will post that result here when I reach month six on nmn. This product seems to take more time to dissolve than other products I've taken, which might mean that more of it gets past the stomach and into the bloodstream. But otherwise this product is competitively priced and I've found no fault with it so far.

I bought this product for my husband and myself. We are both seniors. After taking an average of 3-4 capsules a day we had a noticeable difference in our energy level, and mental clarity. There is also a feeling of well being and optimism. I highly recommend this product!