The problem of poor absorption when taking oral capsules seems to be avoided by using the NMN powder under the tongue. It gets absorbed directly into the bloodstream and is not digested in the stomach. I’m looking at getting the NMN powder from DoNotAge.com. The 100g container is $117 or about 1.17/day. This is a 3-month+ supply. You can subscribe to get a 400g container (1+ year supply) for $400 or 1$/day which is the best price around for a certified safe and effective NMN supplement.
Thanks for this information!