Pyridoxal isonicotinoyl hydrazine is a cell-permeable and relatively non-toxic iron (Fe3+) chelator that shows high iron chelation efficacy both in vitro and in vivo.

piperine is a biochemical.

C-telopeptide, a cross-linked peptide of type I collagen, is released during bone resorption and has been correlated with bone mineral density (BMD).