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Weekly Reads: Longevity Hype Vs. Cool Research, Losing Your Y, FDA Maelstrom

This week’s coverage juxtaposes longevity hype with emerging science, highlighting David Sinclair’s bold claim that aging could be reversed within 10‑20 years, a new Nature paper confirming adult hippocampal neurogenesis, and research showing men lose the Y chromosome as they age. At the same time, the FDA’s Center for Biologics Evaluation and Research is embroiled in internal power struggles between Commissioner Marty Makary and CBER chief Vinay Prasad, leading to erratic rare‑disease drug decisions. The agency also released draft guidance for bespoke gene‑therapy approvals, promising a flood of individualized treatments. Together, these developments illustrate the tension between visionary biotech promises and regulatory realities.