It is called irisin, but it is better known as the “sport hormone” : it is in fact a hormone that has only recently been discovered. The news of his discovery is only a few years ago. In 2012, a group of Harvard scientists published in the journal Cell the discovery of this particular hormone found in mice, which would have beneficial effects on weight loss and cardiovascular health. The discovery was debated in the following years, for this reason it had little media coverage. According to Dr.  Bruce M. Spiegelman, the father of the discovery on irisin, the hormone is also produced by humans at very low doses, but its production increases if we play sports. So the more sports we play, the more irisin our body produces. After this interesting discovery, other scientists have conducted investigations : Does having more irisin in the body make you lose weight? Is it good? What are the benefits?

Irisin would make you lose weight : it acts on the metabolism in a beneficial way. In short, metabolic acceleration would not be a question only of how much food we ingest and how much we burn, but it would depend on hormonal factors, including the role of irisin. In short, sportsmen tend to have fewer metabolism problems and fewer cardiovascular problems.

Irisin fights osteoporosis: they were a group of researchers from the University of Bari, in collaboration with the Marche Polytechnic University of Ancona and the support of Siommms (Italian Society of Osteoporosis, Mineral Metabolism and Diseases of the skeleton) to discover that irisin protects us from osteoporosis. It would therefore be true that sport also acts on the skeletal system, fortifying it.
But if you need to do a lot of sport to lose weight (gym at least 3 times a week, for example), to have benefits on the skeletal system, you just need an improvement in normal production, therefore even small concentrations.
And soon drugs will arrive to “mimic” the action of sport to increase irisin as much as it takes to fight osteoporosis.