Health

Practical health and wellbeing guides — what the evidence supports, what it does not, and what is worth your time.

Dose, form and third-party testing tell you more than any claim on the front of the pack.

Consumer devices infer sleep stages from movement and heart rate. Useful for trends, weak on specifics.

Fixed daily targets are marketing conventions. Thirst and urine colour are better guides for most people.

Technique affects the reading more than the device does, and most home errors are avoidable.

Consistent moderate walking has strong evidence behind it. The famous step target does not.

Use-by is a safety limit. Best-before is about quality, and confusing them wastes a lot of food.

Blue light filters have thin evidence. Blink rate, distance and regular breaks have better.