Author name: Ryan Bethencourt

Biotech investor, founder, and writer. Co-founded IndieBio, the world's largest seed biotech accelerator. CEO of Wild Earth. 180+ early-stage biotech investments. Writing about longevity science, AI, and what comes next at Grey Area Labs and in the Accelerated newsletter.

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AI for Science

Semaglutide vs Tirzepatide for Longevity: Beyond Weight Loss, What Does the Data Show? (2026)

Semaglutide vs Tirzepatide for Longevity: Beyond Weight Loss, What Does the Data Show? (2026) GLP-1 agonists have taken over the health conversation, but most people are asking the wrong question. They’re obsessing over weight loss when the real story is what these drugs do to your metabolism, inflammation, and cardiovascular risk. I’ve reviewed every major

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Senolytics Compared: Fisetin, Dasatinib + Quercetin, and Navitoclax — What the Evidence Shows (2026)

Senolytics Compared: Fisetin, Dasatinib + Quercetin, and Navitoclax — What the Evidence Shows (2026) Most longevity interventions feel like shots in the dark: hope the mechanism holds up, hope it translates to humans, hope you survive the side effects. Senolytics are different. They target something real—senescent cells—and we’ve known what they do to aging for

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Urolithin A vs CoQ10: Which Mitochondrial Supplement Is Worth Taking? (2026)

Urolithin A vs CoQ10: Which Mitochondrial Supplement Is Worth Taking? (2026) Mitochondria are the aging cell’s achilles heel. As you age, your mitochondria become dysfunctional—slower at producing ATP, generating more oxidative stress, and failing to trigger the quality control mechanisms that normally clear damaged mitochondria. Both urolithin A and CoQ10 claim to fix this, but

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Fisetin vs Quercetin: Which Senolytic Flavonoid Is More Effective? (2026)

Fisetin vs Quercetin: Which Senolytic Flavonoid Is More Effective? (2026) Senolytics—drugs or compounds that selectively kill senescent cells—have become the hottest thing in longevity science since NAD+ precursors. And the two compounds most people ask me about are fisetin and quercetin. Both are natural flavonoids. Both kill senescent cells in lab conditions. Both are cheap.

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Rapamycin vs Metformin for Longevity: What the Evidence Actually Shows (2026)

Rapamycin vs Metformin for Longevity: What the Evidence Actually Shows (2026) If you’ve read anything about longevity science in the past five years, you’ve seen rapamycin and metformin compared endlessly. I’ve literally made investments in companies developing both compounds for aging. But here’s what bothers me: most comparisons are oversimplified. People say “rapamycin is stronger”

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AI Coding Agents in 2026: Claude Code, Cursor, Copilot, and the Agentic Coding Revolution

The Shift From Autocomplete to Agents: What Changed Two years ago, the state-of-the-art AI coding tool was GitHub Copilot—basically autocomplete on steroids. You’d start typing a function, and it would suggest the rest. It was useful for the obvious cases—writing a for loop, implementing a standard algorithm—but it required you to direct every step. You

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