What food takes the longest time to digest?

Plant-based foods such as fruit and vegetables will usually move through more quickly than high-protein or fatty foods.

In fact, fat is the most slowly digested macronutrient, followed by protein and then carbohydrate.

The digestive process differs for carbs, fats and proteins, as does the amount of time it takes for each macronutrient to digest. While carbohydrate digestion begins in the mouth when you take a bite, fat digestion doesn't begin until it reaches the small intestine.

Also, compared to protein and carbs, fat molecules are more complex, which means they're harder for your body to break apart, which adds to the digestion time.