How many times you chew before swallowing changes how your body responds to food, measurably and in ways that go beyond common sense advice to "eat slower." A controlled study had 13 participants chew 55 grams of almonds either 10, 25, or 40 times before swallowing, then measured hunger, fullness, and gut hormone levels over the following hours.[1]
Thorough chewing also appears to make nutrients more accessible before food even reaches the gut. Breaking food into smaller particles increases the surface area bacteria and digestive enzymes can act on. The researchers noted this can increase the availability of unsaturated fat and fat-soluble nutrients like vitamin E. Intact plant cell walls in foods like nuts otherwise trap some of that fat until they're physically broken down.[1]
Most people chew far fewer times than 25 to 40 per bite without realizing it, especially with soft or processed foods. Chewing gum works the jaw the same way without food to break down, which is part of why its digestive effects look different.
Foods that require more mechanical breakdown, nuts, raw vegetables, tougher cuts of meat, are the easiest place to build the habit since they demand more chewing naturally.
Slower chewing takes longer per meal; a rushed meal schedule works against the habit regardless of intention.
What to do with this
Aiming for something closer to 25 to 40 chews per bite, especially for foods like nuts, raw vegetables, and tougher proteins, is a concrete, evidence-backed target rather than a vague "chew more" suggestion. The effect shows up within a single meal, in the form of stronger fullness signals and a faster insulin response, so it's a habit with a fast feedback loop if you pay attention to it. This matters most for calorie-dense, whole foods like nuts and seeds, where more thorough chewing measurably changes how much of the fat inside is absorbed.
