doi: 10.1155/2020/8438602 208
(Roughly speaking, it costs between $100 and $300 a month, depending on the source, dosage, and stack one chooses.) Its also pretty easy to do online research and find consistent and reliable-seeming advice on dosages and protocols to start a regimen yourself, if walking into a not-yet-proven world and the potential risks associated with it sits well with you
Risks are mostly local, including bruising, swelling, contour irregularities, or nerve injury, rather than systemic side effects like you might see with drugs
One possible mechanism is through the modulation of neurotransmitters involved in appetite regulation, such as dopamine and serotonin
On the other hand, when only NAD+ is supported: Cells may produce energy more efficiently, but oxidative stress may still place a burden on them