said,
"No better way to crash social security and medicare than for everyone to live to 120 years old." Gates and his crew at "The Limits to Growth" took care of that problem
https://www.bitchute.com/video/5Sostsv5UoJr/ For those that doesn't believe Gates is a demigod.
Fibroblast growth factor 21 is also a blood biomarker of mitochondrial disease. In other words healthy mitochondria will likely give an expression of FGF21. (IE: melatonin)