The high-dosage NMN (boosting production of NAD+) fed to mice via drinking water appears to be 300 mg/kg of bodyweight/day. How much would it cost to produce 5

The high-dosage NMN (boosting production of NAD+) fed to mice via drinking water appears to be 300 mg/kg of bodyweight/day. How much would it cost to produce 5 grams per day (adjusted for a couple of humans)? and how could a regular, motivated (software) engineer learn to do it? Edit: adjusted the dose to 1/12th for mice-to-human adjustment, we're looking at 5g NMN/day for a couple (not 50g).