The substance is blood plasma. There are lots of studies showing that blood from young subjects makes aged subjects' tissue look younger and vice versa. There's even been some factors identified, it's likely related to the aging of the immune system.
The substance is blood plasma. There are lots of studies showing that blood from young subjects makes aged subjects' tissue look younger and vice versa. There's even been some factors identified, it's likely related to the aging of the immune system.
Parabiotic mice are often used for these studies.