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He Hawks Young Blood As A New Miracle Treatment. All That's Missing Is Proof.

Jesse Karmazin, the 34-year-old founder of the startup Ambrosia, had a pitch journalists couldn’t resist: For a fee, he could help his clients combat aging and its related ills with infusions of blood plasma from the young. Teen donors, vampiric undertones, a serious-sounding study, an $ 8,000-per-person price tag and rumors that venture capitalist Peter […]