What is the fundamental difference in exclusion between vegan and vegetarian diets?

Answer

A vegetarian diet excludes meat, poultry, and fish, whereas a vegan diet excludes all products derived from animals.

The main divergence is that vegetarianism stops at excluding flesh (meat, poultry, fish), while veganism extends to exclude everything derived from an animal, including dairy, eggs, and often honey.

What is the fundamental difference in exclusion between vegan and vegetarian diets?
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