At CES 2026, the line between health tech and science fiction blurred, as bodily fluids took center stage. From urine and blood to sweat and saliva, the show floor was flooded with devices promising to decode the body’s most intimate data to help people live longer, healthier lives. Among the most eye-catching innovations: a smart toilet that tracks hydration through urine, a menstrual pad that monitors flow and health markers, a mirror that analyzes facial blood flow to estimate biological aging, a $99 urine-based hydration tracker, a sperm microscope, and a smart scale that reads metabolic health from foot sweat. These weren’t just gimmicks—they were part of a broader trend: the rise of metabolic health as the next frontier in digital wellness. The shift reflects a move beyond step counts and heart rate. Companies are now focused on deeper, more personal data—glucose levels, hormone balances, inflammation markers, and more. Bigger players are getting in on the act too. Withings partnered with Abbott to integrate continuous glucose monitors (CGMs), while Oura and Dexcom have long-standing data-sharing collaborations. Whoop, Ultrahuman, and others are also expanding their platforms to include blood panel data. But with more data comes more risk. Both Oura CEO Tom Hale and Dexcom CEO Jake Leach emphasized the delicate balance between useful insights and health anxiety. “We don’t need more sensors. We need more sense,” Hale said. He believes metabolic data should be used for specific, episodic use cases—like stress or hormonal shifts—not constant monitoring. The real challenge, they agree, is turning raw data into meaningful, actionable insights. That’s where AI comes in. Dexcom, Oura, and Garmin are all adding AI-powered nutrition tracking, health summaries, and chatbot advice. But as Leach put it, “The AI just isn’t there yet.” Privacy remains a major concern. The backlash Oura faced earlier this year over its partnership with Palantir—despite the company’s clear denials—showed how quickly trust can erode. Hale admitted the incident was a wake-up call: “People are terrified of data sharing, especially around sensitive topics like menstruation.” Still, the momentum is clear. Wearables are evolving from fitness tools into preventive health platforms. Expect to see more integration with smart glasses for food tracking, real-time nutrition analysis, and chronic condition management. Will the average person start peeing in a smart toilet or stepping on a $600 sweat scale? Probably not. But the message is clear: the future of health tech isn’t about closing fitness rings. It’s about small, data-driven lifestyle experiments aimed at long-term wellness. And for that, the body’s fluids may be the most important data source of all.