Nix Raises $10M for Hydration Intelligence, Life Time Bets on Healthy Aging, Supplement Use Hits 78%

September 18, 2026: Your daily rundown of health and wellness news, in under 5 minutes. Today's top stories: Nix Biosensors raises $10M Series A to license its hydration algorithm into fitness platforms, shifting from hardware to health data infrastructure Life Time expands its ARORA healthy-aging program as class size triples since 2022, tapping into the 56% of consumer spending held by adults 50+ Pew data finds 78% of US adults now take a supplement, with protein use surging among Gen Z even as seniors lead overall adoption More from Fitt: Fitt Insider breaks down the convergence of fitness, wellness, and healthcare — and what it means for business, culture, and capital. Subscribe to our newsletter → insider.fitt.co/subscribe  Work with our recruiting firm → https://talent.fitt.co/ Follow us on Instagram → https://www.instagram.com/fittinsider/ Follow us on LinkedIn → linkedin.com/company/fittinsider  Reach out → insider@fitt.co