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KX2By Kronos
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KX2By Kronos
Start KX2

Science for a brighter human tomorrow.

KX2 is designed to feel simple. Behind it is evidence, ongoing research and real-world learning — clearly separated so you can see what supports the experience today and what is still developing.

Explore the Lab
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Dr. Yudara Kularathne

Dr. Yudara Kularathne

Founder & Chief Executive Officer, Hii.Health

Doctor. Engineer. Entrepreneur.

Dr. Yudara Kularathne is a Consultant Emergency Physician, AI innovator and builder. His work turns frontline clinical insight into measurable, technology-enabled health experiences. He leads Hii.Health at the intersection of science, technology and continuous physiological measurement.

Explore Yudara’s story (opens in a new tab)

Built by Hii.Health

KX2 is being built by Hii.Health, a digital biomarker lab building a new generation of non-invasive health measurements using smartphone cameras, wearables and AI.

Visit Hii.Health (opens in a new tab)

Research

What we’re learning so far.

Our first KX2 studies are beginning to show how hydration-related change can be measured (Paper 01), how patterns can differ between people (Paper 02), and why women-focused personalization deserves further study (Paper 03).

These are early findings, and each piece of work has its own limits.

  1. Hydration changes, but most established ways of measuring it are difficult to repeat in everyday life. Our first study asked whether a short facial video could detect a change when people moved from prolonged fasting to drinking again.

    Hydration changes, but most established ways of measuring it are difficult to repeat in everyday life. Our first study asked whether a short facial video could detect a change when people moved from prolonged fasting to drinking again.

    The KX2 Score moved upward in almost every participant after drinking. In smaller subgroups, body weight and serum osmolality also changed in the expected direction after fluid intake.

    What this means: This gives us early real-world evidence that the score can track the direction of hydration-related change.

    KX2 is not a clinical diagnostic test for dehydration, and the score should not be treated as interchangeable with a laboratory hydration measure.

    Read Paper 01

  2. One reading captures one moment. Our second study asked what happens when the same people are followed repeatedly across a full day.

    One reading captures one moment. Our second study asked what happens when the same people are followed repeatedly across a full day.

    Five adults completed facial-video scans throughout the day while following the same fluid schedule. Their average scores could look similar, yet their day-to-day patterns, stability and responses to the same fluid input differed markedly.

    What this means: A person’s own trajectory may matter more than a single reading or one generic daily fluid target.

    Read Paper 02

  3. Most hydration guidance still begins with population averages, even though women’s physiology changes across the menstrual cycle and through midlife.

    Most hydration guidance still begins with population averages, even though women’s physiology changes across the menstrual cycle and through midlife.

    This review brings together evidence on hydration, female hormonal physiology, reproductive aging and electrolyte nutrition, with particular attention to women in midlife. It also examines why magnesium and mineral balance deserve further study in women-focused hydration.

    What this means: There is a scientific rationale for studying measurable, personalized hydration designed around women’s physiology rather than assuming one rule works for everyone.

    Read the scientific review

Evidence has layers. We show you which is which.

Not every source answers the same question. We keep each layer clearly labelled.

Science doesn’t stand still. Neither does KX2.

KX2 evolves with the evidence — bringing together new research, expert perspectives and real-world learning to continuously refine the experience.

Explore KX2