The modern diet, with its emphasis on quick-fix, processed foods, is silently revolutionizing our chewing habits. This shift, often overlooked, has profound implications for our health, from appetite regulation to breathing mechanics. Claire Turnbull, a nutritionist and breathing coach, delves into this intriguing connection, highlighting how our ancestors' chewing routines differ significantly from our current practices.
The Evolution of Chewing
Humans, as omnivores, are designed to chew. Our teeth and digestive system reflect this, with canines for tearing, molars for grinding, and a digestive tract equipped to handle a variety of foods. In hunter-gatherer societies, like the Hadzabe people of Tanzania, chewing was a daily ritual, with an estimated 90-100g of fiber consumed from plant matter. This is a stark contrast to the average New Zealander, who consumes only 20 grams of fiber daily.
The impact of inadequate chewing is significant. It influences jaw development, tooth positioning, and airway function. From a nutritional perspective, chewing affects not only digestion but also the amount and type of food we can consume.
The Rise of Soft Foods
Food processing has evolved to make food more palatable and convenient. Soft foods, designed to dissolve instantly on the tongue, require minimal chewing. Breakfast cereals, puffed snacks, and liquid breakfast drinks are prime examples. While these foods offer convenience, they bypass the body's natural system for managing food intake, disrupting the cephalic phase response and the release of satiety hormones.
The Fiber Illusion
Many processed foods now boast added fiber, but not all fiber is created equal. Inulin, a common fiber additive, offers benefits for gut bacteria but doesn't replicate the experience of wholefood fiber. The latter, packaged within plant structure, requires chewing and supports the production of short-chain fatty acids, which trigger the release of natural satiety hormones.
Children and Chewing
Children, too, are affected by the rise of soft foods. According to a University of Otago study, children in New Zealand consume nearly half of their energy from ultra-processed foods by age one, and over half by age five. While softer foods are appropriate for babies, the goal should be to gradually introduce family foods, ensuring children have safe, age-appropriate opportunities to chew and manage textures.
What You Can Do
It's not about feeling guilty for enjoying mashed potatoes or smoothies, but rather reflecting on the processed foods in your diet. Consider the following:
- Opt for whole fruits with the skin on.
- Enjoy raw vegetables or cook them with a bite.
- Choose whole nuts and seeds over ground varieties.
- Include pulses like lentils, chickpeas, and black beans.
- Select less processed grains and grains with visible grains and/or seeds.
- Slow down during meals, chewing and pausing to notice flavors.
- Give yourself enough time to eat, stretching beyond the usual five minutes.
- Remember to breathe during mouthfuls.
- Look beyond the fiber number on packaged food labels and consider the source.
- Reflect on whether your children are getting enough opportunities to chew.
In conclusion, the modern diet's emphasis on soft, processed foods is silently altering our chewing habits, with implications for health and well-being. By making conscious choices, we can reclaim the benefits of chewing and foster a healthier relationship with food.
