One thing most people don't understand - there is quite a difference between manufacturers, even if they are the same purity. PH, particle size, and other differences influence how it tastes, dissolves, and absorbs.
One 98% NMN can be very different than another 99%. A lower PH (more acidic), will taste more sour, but absorb better and be more stable. PH should be between 4 and 4.5.
It once again shows the length that you go to in supplying a “top line” supplement.
So does my elderly mom
Resveratrol 400mg since June 2019; 600mg since October 1; 800mg since January 2020
NMN Sublingual 250mg since june 2019 500mg since September 2019
NAD+ Nasal, appx 100mg per day since September 2019; 200mg per day beginning mid November