The most affordable and convenient NAD precursor is NMN (nicotinamide mononucleotide). I take 1g (1/2 tsp) in powder form under my tongue before food in the morning since it breaks down with digestion. There is also a capsule form if you prefer. You probably don’t need it until age 45 when your natural levels decline.
I feel more energy during the day and sleep better at night. Other people report better performance in sports and exercise. In the long term, the goal is a longer life without mental decline.
Amazon has sold untested and mislabeled NMN products in the past. I would only trust an independently tested source from DoNotAge.com in the UK.
I use ConsumerLab.com, which truly tests all sorts of brands and does not sell any of them.
OK, if FDA has banned sales in the US, how are people buying it?
Renue by Science is excellent as well if you are looking for a third party tested US product. I take NMN Lipo (500 mg) in tablet form every morning and notice
As per the latest findings NR seems to cross the blood-brain barrier more effectively than NMN, which is why it has been showing up as a candidate for a treatment for neurodegenerative conditions (COPD, Parkinsons, Alzheimers). NMN helps with apoptosis, endothelial cells to form new blood vessels, inflammation blood flow and circulatory issues.
https://www.cell.com/iscience/pdf/S2589-0042(24)02883-9.pdf