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What's the age limit for donating stem cells? Understanding Eligibility and Age Restrictions

According to the National Marrow Donor Program (NMDP), the recruitment focus for unrelated stem cell donation is on younger donors, specifically those aged 18 to 40, to provide the best outcomes for patients. But **what's the age limit for donating stem cells** for older individuals, and why do these age guidelines exist? It's a question with a nuanced answer that goes beyond a single number, focusing heavily on health and patient success.