Diet on Trial: Popular diets and the research behind them
The Mediterranean Diet
The PREDIMED trial followed 7,447 adults in Spain. What the results show about olive oil, nuts and heart disease, and what they do not.
Anti-Inflammatory Eating
Which foods have evidence behind them, and which claims come from a single small study.
Fiber and the Gut
How much fiber adults need, and how psyllium compares with fiber from food.
The Ketogenic Diet
Very low carbohydrate eating for weight and type 2 diabetes, and how long people stay on it.
Trim Healthy Mama
A plan that separates fuel types at each meal. What research supports, and where the rules go further.
Intermittent Fasting
Time-restricted eating compared with counting calories when both groups eat the same amount.
Going Dairy-Free
Getting enough calcium and vitamin D without milk, cheese or yogurt.
Protein
How much protein adults need, and how plant and animal sources compare.
Fermented Foods
Kimchi, yogurt and kefir. What feeding studies found about gut bacteria.
About Diet on Trial
Diet on Trial reviews popular diets against the published research. Each guide names the studies it relies on and links to them, so readers can check who took part, how long the study ran and what was measured.
The site is editorial and does not give individual medical advice. Selected guides are also published in Korean.