Before choosing a diet, choose the question
A reading map connecting weight, food quality, glucose measurements and maintenance—with a fair way to compare popular diets.
6 source recordsRead the lesson
A LEARNING PATH
Food beyond the headline
Which diet question are you really asking?
Separate weight, glucose, food structure and adherence before comparing diets.
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STAGE 01 · 4 QUESTIONS
Compare dietary patterns
After reading, try this: Separate weight change from cardiovascular outcomes before ranking a diet.
- 01Low carb or low fat: what actually wins after a year?
Low carb or low fat: what actually wins after a year?
Compare two dietary strategies without confusing their names, achieved intake, or average results with a personal prediction.
Free lesson 4 min · full lesson - 02Does ketosis prove that more body fat is being lost?
Does ketosis prove that more body fat is being lost?
Separate fuel selection, food intake, body weight, and body-fat change before judging a ketogenic-diet claim.
Free lesson 3 min · full lesson - 03Is the Mediterranean diet evidence about olive oil or an entire pattern?
Is the Mediterranean diet evidence about olive oil or an entire pattern?
Read a dietary-pattern trial without turning it into a claim for one premium ingredient.
Free lesson 4 min · full lesson - 04A DASH learning week: turn food groups into meals
A DASH learning week: turn food groups into meals
Use a clearly labeled example week to practice a DASH-style pattern, compare sodium sources and distinguish a food-group guide from a personalized meal prescription.
Free lesson 5 min · full lesson
STAGE 02 · 4 QUESTIONS
Read food in context
After reading, try this: Use an equal amount of two fictional foods to compare their label values.
- 05Two food labels: compare the amount you actually mean
Two food labels: compare the amount you actually mean
Use two fictional cereal labels to compare portions, sodium, added sugars and fiber without turning one nutrient into a health score.
Free lesson 5 min · full lesson - 06Why can ultra-processed menus make people eat more?
Why can ultra-processed menus make people eat more?
Use a controlled feeding experiment to distinguish a causal menu effect from a claim about every packaged food.
Free lesson 3 min · full lesson - 07Why does fiber have stronger evidence than a “gut reset”?
Why does fiber have stronger evidence than a “gut reset”?
Compare long-term diet evidence, short-term trials, and microbiome markers without treating them as interchangeable.
Free lesson 3 min · full lesson - 08Does increasing protein guarantee better long-term weight loss?
Does increasing protein guarantee better long-term weight loss?
Separate a macronutrient target, an achieved diet, and the additional value of a strategy over time.
Free lesson 3 min · full lesson
STAGE 03 · 4 QUESTIONS
Understand timing and measurements
After reading, try this: Explain why a short glucose curve cannot stand in for every metabolic outcome.
- 09Does an eight-hour eating window add weight loss beyond calorie restriction?
Does an eight-hour eating window add weight loss beyond calorie restriction?
Use the comparator to distinguish a convenient routine from a proven additional effect.
Free lesson 3 min · full lesson - 10Can earlier eating change metabolic markers without weight loss?
Can earlier eating change metabolic markers without weight loss?
Explore a small proof-of-concept experiment and why an interesting mechanism is not a universal meal schedule.
Free lesson 3 min · full lesson - 11Glucose tests: four measurements, four different questions
Glucose tests: four measurements, four different questions
Compare fasting plasma glucose, A1C, an oral glucose tolerance test and continuous monitoring by what they measure, when they measure it and what can distort the result.
Free lesson 4 min · full lesson - 12Does an individual glucose response tell you which food is healthiest?
Does an individual glucose response tell you which food is healthiest?
Separate prediction of a meal response from proof of better long-term health.
Free lesson 3 min · full lesson
STAGE 04 · 4 QUESTIONS
Keep the longer view
After reading, try this: Write one question about maintenance or comparison that a headline leaves out.
- 13After weight loss: build a pattern that survives ordinary life
After weight loss: build a pattern that survives ordinary life
Maintenance is an ongoing task involving appetite, a changed energy requirement, repeatable meals, support and plans for interruptions. A fictional workweek shows how to make the task concrete.
Free lesson 5 min · full lesson - 14Do fermented foods “rebuild” the gut microbiome?
Do fermented foods “rebuild” the gut microbiome?
Understand what changed in a small dietary experiment and why microbial diversity is not a clinical cure.
Free lesson 3 min · full lesson - 15Why do sweetener headlines seem to contradict one another?
Why do sweetener headlines seem to contradict one another?
Separate sugar replacement, long-term weight-control guidance, observational associations, and toxicology.
Free lesson 3 min · full lesson - 16What can a salt-substitute trial tell us about a small dietary change?
What can a salt-substitute trial tell us about a small dietary change?
Read a large pragmatic trial, including its event-rate denominator and the limits of potassium-containing substitutes.
Free lesson 3 min · full lesson
Explore topic figures and further reading
ONE STUDY, IN CONTEXT
Same people. Two menus. Different intake.
20 adults in an inpatient randomized crossover trial; two weeks on each diet.
Mean body-weight change, kg (±0.3 SE in each period)
Ultra-processed diet+0.9 kg
Average weight gain
Unprocessed diet-0.9 kg
Average weight loss
−1 kg0+1 kg
Energy intake was 508 ±106 (SE) kcal/day higher on the ultra-processed diet.
Two specific menus in a controlled setting. This does not rank every packaged food or predict an individual’s weight change.
Hall et al. · Cell Metabolism · 2019 · 2026-09-21Original editorial redraw · Professional review pending
Read the numbers, study scope and original source
20 adults in an inpatient randomized crossover trial; two weeks on each diet.
Mean body-weight change, kg (±0.3 SE in each period)
- Ultra-processed diet
- 0.9 · Average weight gain
- Unprocessed diet
- -0.9 · Average weight loss
Energy intake was 508 ±106 (SE) kcal/day higher on the ultra-processed diet.
Two specific menus in a controlled setting. This does not rank every packaged food or predict an individual’s weight change.
PubMed abstract and figure descriptions read; not a full-paper review.
Hall et al. · Cell Metabolism · 2019Connect the questions
Keep watching & listening
Explore creators’ ideas in their original context. These media links are not the scientific evidence for this course.
The 10 Glucose Goddess Hacks
Official video and transcript; describes her communication framework.