Use the Levels app to follow your personalized plan, then re-test to see real, measurable changes- often within weeks. Our experts translate your health story into the actions to take and the targets to hit, so …

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Join Levels to see how food affects your health. Through data and insights we help you tailor your nutrition, sleep, and exercise to hit your health goals.

Levels helps you understand your body through comprehensive lab testing, glucose monitoring, and AI-powered habit tracking—so you can take daily action and improve what matters most.

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Learn what 100-, 200-, 300-, and 400-level college courses mean, how prerequisites and difficulty escalate, and where these fit in your major and degree plan.

Dec 1, 2025 · The chemicals would "most likely" impact my health, but there are ways to bring levels down, I was told.

1 day ago · NPR's Steve Inskeep speaks with FDA Commissioner Martin Makary about the decline in testosterone in men in the U.S. and what his agency wants to do about it.

Explore real-time river levels and flood conditions across the United States using the interactive map below. Toggle different layers to view river gauges, hazards, precipitation estimates, and flood …

Water flow and levels in streams and lakes. Water levels in wells. Chemical and physical data for streams, lakes, springs, wells and other sites. Water use information.