The science of eating well.
Twenty-two plain-English lessons on how food becomes you, from the calorie to the gut microbiome. A nutrition atlas of over seventy foods, more than 170 practice questions, and working calculators for your energy needs, macro split, calorie goal, protein target, BMI, and hydration. Free, forever, for anyone who eats.
Where to begin.
Twenty-two lessons, the whole field.
Who built the science of food.
Milestones in nutrition.
Diet by the numbers.
Ideas worth carrying with you.
Common questions, plain answers.
Popular eating patterns, side by side.
Where this science goes to work.
Things that are not true.
Learn how food works.
Start anywhere. Each lesson stands alone, reads in about twelve minutes, and can be read aloud. Tap a card to open it.
Everyday eating, taken apart.
The skills that turn knowledge into meals: building a balanced plate, reading a label, planning a day of food. Tap any to expand.
Ideas the whole field rests on.
The numbers, step by step.
Test what you know.
Over 170 questions across all topics, with an explanation after every answer. Pick a focused set or take the mixed challenge.
Mixed sets.
Focus on one area.
Run your numbers.
Six working calculators built from the formulas in the lessons. Everything runs in your browser. Nothing is stored or sent anywhere.
The reference library.
Seventy-five common foods with calories and key nutrients. The macronutrients and the vitamins. The food groups. Daily targets, and the major minerals.
| Food | Typical serving | Calories | Key nutrients |
|---|
Values are rounded per typical serving and vary with brand, variety, and preparation. Use as a guide, not a lab measurement.
The micronutrients in brief.
| Nutrient | Applies to | Typical daily target |
|---|
Targets are general adult guidance and differ by age, sex, pregnancy, and activity. They are not a prescription. Ask a clinician about your own needs.
| Mineral | Main role | Where to find it |
|---|
Common diet-related issues, with cause and current thinking. Educational only, not medical advice.