NAD+ vs HGH

Only one of these is a peptide, and saying so first saves everyone time.

NAD+ is nicotinamide adenine dinucleotide: a coenzyme present in every cell, central to redox reactions and a substrate for sirtuins and PARP enzymes. It sits alongside peptides in this catalogue because researchers reach for it with the same questions, not because it belongs to the same chemical class.

HGH is recombinant somatropin — the complete 191-residue growth hormone, acting through its own receptor and largely via IGF-1, with decades of clinical characterisation in defined deficiency states.

So the fork is between restoring a metabolic cofactor and supplying a hormone. Different levels of biology, different literatures, and no head-to-head work connecting the two. We are not going to manufacture one by placing them in the same table and letting the layout imply a contest.

The vials reflect that distance. NAD+ is reconstituted with sterile saline or bacteriostatic water and used within 24 hours; HGH holds 21 days refrigerated once reconstituted. Because the units differ, the price-per-milligram column carries a figure for NAD+ and a dash for HGH — international units do not divide into milligrams, so the cell stays empty rather than guessing.

Both are stored at 2–8 °C and protected from light, and both are supplied for laboratory research only. Availability above reads from live catalogue data rather than a fixed list.