No, teenage blood won't make you young and beautiful (popsci.com)

I wonder if studies like this could eventually have an impact on blood donor age ranges?

The Red Cross[1] current lower limit is 17 (16 with guardian consent), with no upper limit as long as donor is well & not restricted in activity.

[1] http://www.redcrossblood.org/donating-blood/eligibility-requ...