Yes, there is an alternative to NMN, which is NR (Nicotinamide Riboside). While NMN is considered an unauthorised Novel Food by the European Commission, NR is authorized in Europe. Both NMN and NR are forms of vitamin B3 and are precursors to NAD+. NR, like NMN, contributes to increasing NAD+ levels in the body. They are chemically identical, except for one phosphate group on NMN. Research has shown that NR can enter the cell immediately, while NMN cannot. This makes the consumption of NR more efficient.