Mecova-2500 is one of their best Methylcobalamin Injections and is used widely for nerve care
Sci Rep 9:7788 Ramesh SA, Kamran M, Sullivan W, Chirkova L, Okamoto M, Degryse F, McLaughlin M, Gilliham M, Tyerman SD (2018) Luminum-activated malate transporters can facilitate GABA transport
And with NR safety research reporting few to no adverse effects up to 2,000mg per day, theres a lot of room to experiment (under a doctors supervision, of course).31 You can get NR from Nootropics Depot in 30-, 90-, and 365-day supplies
Collagen Extract (2,000mg): Improves skin elasticity, reduces wrinkles, and promotes youthful-looking skin
doi: 10.1007/978-0-387-74039-3_10 517 ShaoZMShenZZLiuCHSartippourMRGoVLHeberDet al