These are extremely beneficial, as we often see senior cats return to a more youthful state of being when blood tests identify an issue that can be easily treated. (bracpet.com)
It's also a fairly youthful state, with 21 percent of the population between 20 and 34. (creditdonkey.com)
A protein in blood can repair age - related damage in the brains and muscles of old mice, returning them to a more youthful state. (newscientist.com)