diet

The United States has 200,000+ fast food outlets — more than any country. McDonald's operates in 100+ countries with 40,000 locations. China is the world's fastest-growing fast food market. Here are the countries with the most fast food restaurants, the forces that drove their growth, and what the data reveals about diet and culture.

India has the highest self-reported vegetarian share, but no clean global ranking of vegans and vegetarians exists. Here is what national surveys actually measured, why they disagree, and what the climate data says about plant-based diets.

Sugar has been blamed for everything from obesity to cancer to Alzheimer's. The reality is more nuanced — quantity, source, and context all matter. Here's what nutrition science actually shows.

The fitness industry says you need 1g per pound of body weight. Public health agencies recommend much less. Here's what the actual evidence says about protein requirements.