Talk about a bloody genius treatment. A study published in Scientific Reports has identified a promising, unconventional source for treating the more than 600 million people living with osteoarthritis . While plenty of women deal with the downsides of menstrual blood ruining underwear , there could be a benefit to the monthly cycle. A research team in Lithuania used extracellular vesicles — messenger-like particles released by cells that promote regeneration or reduce inflammation — derived