GLOSSARY

Fetuin-A is a mainly hepatic protein with multiple functions and metabolic associations.

Muscle, liver, bone and adipose tissue produce signals alongside their other functions. Myokine, hepatokine and lipokine group molecules by source or nature, with unequal evidence across members. Blood detection does not prove a unique source. Cellular and animal findings about muscle or bone cannot be converted directly into human hormonal treatment or performance products; human outcomes and measurement methods must be established rather than assuming all organ-derived signals have proven athletic uses.

Adipose tissue contains several cell types, so adipokines are not restricted to adipocyte secretion. Molecules can associate with inflammation or insulin sensitivity without proving causation or treatment utility. Human and animal sources may differ. Adipokine ratios are not universal athletic targets; assays, units and energy state must be specified. A research pathway cannot alone justify a supplement or establish that changing one circulating protein will improve performance.

AMPK, mTOR and related pathways integrate energy, amino-acid and other information; these proteins are not circulating hormones themselves. Components have different roles and tissue-dependent responses. A brief rise in an anabolic marker is not equivalent to guaranteed muscle gain. Effective training, adequate energy and protein and recovery opportunity are needed alongside molecular signaling for real outcomes rather than judging success from pathway activation alone.