Get full access to Outside Learn, our online education hub featuring in-depth nutrition, fitness and adventure courses, and more than 2,000 instructional videos when you sign up for Outside+..
Confused by buzzwords that describe popular diets? Check these out.
What is it?
Where to learn more
Short for “ketogenic,” the diet is high in protein and fats, and extremely low in carbohydrates. Ketones are acids released when a lack of carbohydrates triggers burning of stored fat for energy.
Short for “Paleolithic,” an ancient era when humans were hunter-gatherers and didn’t eat grains, legumes, dairy, refined sugar, potatoes, or refined foods.
Eating no gluten, be it in grains with natural gluten content or processed foods with added gluten for texture or mouth feel.
Eating no foods derived from animals, including meat, poultry, fish, and products such as milk, cheese, butter, and honey.