10.1038/nature10350 222 PoursaitidisI.WangX.CrightonT.LabuschagneC.MasonD.CramerS
In addition to the gut-brain and gut-kidney axes, the gut microbiota systemically communicates through other axes such as the gut-liver (Albillos et al., 2020), gut-heart (Zhao et al., 2023), gut-skin (Sinha et al., 2021), and gut-bone (Zhang et al., 2024) axes, among others
Its preserved formulation makes it a practical option for repeated withdrawals in controlled laboratory environments
However, weight changes vary based on diet, exercise, and overall health
Vitamin B12 injections work by directly replenishing depleted cobalamin stores, supporting two crucial enzymatic processes: methionine synthesis for nerve myelination and methylmalonyl-CoA conversion for energy production

Discovered in 2015 by Changhan David Lee and Pinchas Cohen at USC, MOTS-c is encoded in the 12S rRNA region of the mitochondrial genomemaking it one of a small but growing family of mitochondrial-derived peptides (MDPs) that challenge the longstanding view of mitochondria as passive energy factories.1 This discovery sheds new light on mitochondria and positions them as active regulators of metabolism. Changhan David Lee, Assistant Professor of Gerontology, USC Leonard Davis School12 The Exercise Connection Human studies show that circulating endogenous MOTS-c levels increase approximately 1.6-fold during exercise and remain elevated about 1.5-fold post-exercise before returning to baseline after roughly four hours.13 This temporal profile suggests MOTS-c functions as an exercise-induced mitokinea signaling molecule released by mitochondria in working muscles that communicates metabolic status to the rest of the body