Kris Oddo, NASM-certified personal trainer, is the founder and head coach of Gains From Geebs (Geebs Coaching), a 1:1 online fitness coaching practice.
Short answer
Here's the short answer.
Yes, it can matter because fast, low-chew meals can let calories outrun fullness. The point is not to eat perfectly clean; it is to build meals that slow the process enough for hunger and portions to register.
How strong is this kind of study?
Reviews of many studiesThis study
Controlled trials
Observational
Narrative reviews
Systematic review. Heavier plates are built from more studies, so they move less when the next one lands.
Try this
What to test this week.
Pick one high-risk meal or snack and slow it down with a protein anchor, higher-chew food, a plate instead of a bag, and a pause before seconds.
Honest limits
What this research does not prove.
Eating slowly can make portions easier to notice, but it does not guarantee fat loss. Calories, protein, food environment, sleep, and consistency still matter.
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Studies behind this answer
Open the original research.
NutritionRandomized controlled crossover trial
Eating speed can change calorie intake
A mechanical change can make fat loss easier: slower, higher-chew meals can help you notice fullness before calories overshoot.
Source
Forde et al.. American Journal of Clinical Nutrition. 2026. PMID 41314613.
The study does not make every ultra-processed food harmful. Eating rate, texture, protein, fiber, and calorie density all matter.
NutritionRandomized crossover feeding study
Ultra-processed foods can make overeating easier
The practical move is not purity. It is to notice which foods make calories disappear too easily and build meals that require more chewing, protein, and fullness.
Source
Hamano et al.. Diabetes, Obesity and Metabolism. 2024. PMID 39267249.