Free tools that make you harder to fool
Five interactive tools from our nutrition and science team: check your supplements, find your protein range, measure your food’s footprint, and more. All free with an account.
Free accountNo cardUnder a minute to join
How much protein do you actually need?
Not a magic number from a gym influencer. A personal daily range for building and keeping muscle, worked out from your age, training, goals and body, with the research behind every question.
- A range, not a single number
- Built around your training
- “Why we ask” on every question
Do your supplements clash with your medicines?
Add the supplements and medicines you take and the Stack Checker maps any known interactions between them, graded by how serious they are and how strong the evidence is. Then print a summary for your pharmacist.
- An interaction map
- 115 supplements, 30,000+ medicines
- Severity and evidence for each finding
Is your waist telling you more than your weight?
Check your BMI and your waist-to-height ratio against NHS healthy ranges, see where you sit on clear charts, and track both over time. Private, simple and free.
- BMI and waist-to-height together
- NHS and NICE ranges
- Clear charts and a trend line
What’s your Carbon Foodprint?
Build your typical week of food and see its climate, land and water footprint next to a planet-based diet. Then find the easy swaps that make the biggest difference, measured in car miles.
- Climate, land and water
- Compared with a planet-based diet
- What’s driving your footprint
What’s your food misinformation profile?
Nine quick questions reveal what you care about, how you handle viral food claims and the trick most likely to catch you out. Get your profile badge and one next step that fits you.
- Two minutes, nine questions
- Your own profile badge
- Your blind spot, kindly
One account, every tool
Join free and try them all
Your results are saved to your account, there are no ads and no industry money, and it takes under a minute.
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