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Clue

Cycle-tracking app's research-backed writing on reproductive health

Newsletter Wellness Monthly Updated Oct 2026

About

Clue is a period- and cycle-tracking app with a research team behind it, and its newsletter draws on that same evidence base: how hormones affect mood and energy, what's actually normal cycle variation, and reproductive health topics that often get little mainstream coverage.

The tone is clinical but approachable, treating cycle health as a legitimate health topic worth real explanation rather than something to gloss over. It's particularly useful for readers who want sourcing behind claims about hormonal health.

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