Policies
Medical disclaimer
We explain how diets work and what the research says. We can't tell you what's right for your body, and nothing here replaces advice from your doctor, dietitian or pharmacist.
Talk to a professional first if you
- take medication for diabetes, blood pressure or blood thinning
- are pregnant, breastfeeding or trying to conceive
- have kidney, liver, heart or pancreatic disease
- have had an eating disorder, or find yourself restricting food in ways that worry you
- are under 18 or over 65 and planning a big change
- want to try a very low-calorie diet, a long fast or keto
Get help quickly if
You have chest pain, fainting, confusion, severe weakness, a racing heartbeat, repeated vomiting or signs of dehydration while dieting or fasting. Stop and seek medical care. In an emergency, call your local emergency number.
About the information here
The guides are written by the site's founder, Greg Parsons, who is not a clinician. We work hard to be accurate and link our sources, but research changes and pages can go out of date. See how we review content.