:

Does your blood change as you get older? Exploring the effects of aging

By age 70, the percentage of active hematopoietic tissue in the bone marrow decreases to approximately 30%. This decline is just one of many ways that aging affects the blood system. So, **does your blood change as you get older**? Yes, it does, and these changes are a normal part of the aging process, influencing everything from immunity to oxygen transport.