A ketogenic diet is low in carbohydrates and high fat. Usually, most of this fat will be derived from animal products.

On the other hand, veganism is an ideology based on the premise that all living creatures, including animals, should be respected, and that needlessly killing and consuming animals breaches this premise.

With a bit of planning, a vegan or ketogenic diet may not be difficult to follow by themselves. However, a vegan AND ketogenic diet