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Gravis Labs

Learn at your own pace

Health Explorer

Short guided journeys that pair a calculator with the explanation behind it, and quizzes to check what stuck. Everything here is about understanding measurements — nothing rewards a health outcome, a weight target or a number going up or down.

Guided journeys

Four or five steps, each mixing a tool, a guide and a quiz.

  • Understand Your A1C

    Work through what HbA1c measures, how it relates to day-to-day glucose, and where it can mislead.

    5 steps

  • Understand Blood Pressure

    Learn what the two numbers mean, how guidelines differ, and what pulse pressure and MAP add.

    5 steps

  • Understand Cholesterol

    Work through the lipid panel: what each fraction does, what non-HDL adds, and how LDL is calculated.

    4 steps

  • Understand Kidney Numbers

    Learn what creatinine and eGFR measure, why the equation changed, and what one result cannot establish.

    4 steps

Quizzes

A few questions each, with an explanation after every answer — right or wrong.

  • Understanding HbA1c

    Four questions on what HbA1c measures, the period it covers, and when it can be misleading.

    4 questions

  • Blood Pressure Basics

    Four questions on what the two numbers mean, how categories differ by region, and why one reading is never enough.

    4 questions

  • Making Sense of Cholesterol

    Four questions on LDL, HDL, triglycerides and what non-HDL cholesterol adds.

    4 questions

  • Kidney Numbers: Creatinine and eGFR

    Four questions on what creatinine and eGFR measure, and what a single result can and cannot establish.

    4 questions

  • Reading Lab Results

    Four questions on reference ranges, units, and why a single flagged result is usually expected.

    4 questions