Is There Definitive Proof NMN Doesn’t Enter Cells?

yes here's the proofhttps://t.co/bPAFzwe3cw

— Charles Brenner, PhD (@CharlesMBrenner) March 22, 2023

this paper shows that NMN is converted outside of cells to NR & then forms NMN again inside of cells

it also shows that if you knock out the NMRK1 gene, neither NR nor NMN raise NAD

this isn't controversial. known since the 1980s that nucleotides get into cells as nucleosides https://t.co/R5xILKo9Lg

— Charles Brenner, PhD (@CharlesMBrenner) March 23, 2023