Navigating the lexicon of plant-based diets can be tricky, and choosing a diet even trickier. Here’s a brief guide to some of the commonly used terms.

Flexitarians eat a mainly vegetarian diet, but will consume meat on occasion.

Pegans (a term coined by Dr. Mark Hyman, who follows the diet) focus on eating vegetables, fruits, nuts, seeds, meat, fish and eggs, while voiding
dairy, grains, legumes, sugar and processed foods.

Pescatarians like radio host Howard Stern eat fish, seafood and other forms of animal products such as dairy, but don’t eat other forms of meat such as chicken, beef or pork.

Plant-based diets, followed by celebrities like Ben Stiller, consist mostly or entirely of foods derived from plants, including vegetables, grains, nuts, seeds, legumes and fruits, with few or no animal products.

Vegans don’t consume any animal products, including eggs, dairy, honey or gelatin. Famous vegans include Ellen DeGeneres, Betty White, Beyonce, Bill Clinton, Madonna and Venus Williams.

Vegetarians refrain from meat and seafood, but will consume dairy or other animal byproducts such as honey. Well-known vegetarians include Albert Einstein, Arnold Schwarzenegger, Doris Day, Jane Goodall, Kristen Wiig and Prince.