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Resources

Tools, standards and trusted links

Free tools to put the guides into practice, the standards we hold ourselves to, and reputable outside organisations for the questions a website can't answer.

Free tools

Calorie deficit calculator

Estimate maintenance calories, a sensible starting deficit and a protein target. Private: nothing you enter is stored.

Trusted outside resources

We link to public-health bodies and established charities for medical detail and support. We're not affiliated with any of them. Guidance differs between countries, so follow the advice of your own healthcare provider.

Chest changes & gynecomastia

Physical activity guidelines

Healthy weight

Support with eating and body image

In an emergency, or if you have chest pain, difficulty breathing or thoughts of harming yourself, contact your local emergency number or crisis service immediately.

Our standards