Clear, evidence-based health information · Not a substitute for medical advice

Health reference

Health, explained with evidence.

Plain-language guides to hormones, conditions, medicines and everyday health — what the research says, what it means for you, and when to see a doctor.

Common searches Blood pressure Thyroid Diabetes Dehydration Sleep Anxiety

Our method

How we write about health

Read our editorial policy

  1. Sources first

    We build on guidelines and research from bodies such as the WHO, NHS, NIH and peer-reviewed journals, and link to them.

  2. Plain language

    Medical terms are explained the first time they appear, and numbers come with units and normal ranges.

  3. When to see a doctor

    Every guide says which symptoms need medical care. We never tell you to start, stop, or change a medicine.