Which is better… a healthy low-fat diet or a healthy low-carb one? A new study published in the Journal of the American Medical Society (JAMA) this month asked this question. The answer was: no difference. But participants all lost weight without restricting calories. How did this happen?
The DIETFITS study (the Diet Intervention Examining the Factors Interacting with Treatment Success) studied 609 overweight adults aged 18 to 50 for one year. Participants attended classes with dietitians every 2 weeks to learn healthy eating habits, with half learning ways to achieve a lower fat content in their diet and the other half learning to lower their dietary carbohydrates. All participants were encouraged to focus on eating plenty of vegetables and whole foods, to eat at home whenever possible, and to avoid processed foods and added sugar. They were encouraged to follow accepted physical activity guidelines, but most did not increase their exercise. They were not instructed to count calories or record what they ate and were encouraged to eat until they were satisfied.
The result?
The result was: both groups lost significant weight. Their success in reaching a healthier weight was not influenced by their genetics or insulin-response to carbohydrates, contrasting with other theories that suggest a person’s diet should be recommended based on their DNA or ability to metabolize fat or carbs.
Some people lost as much as 50 to 60 pounds, and reported they had “changed their relationship with food”. The average weight loss was 5.3 kg (11.7 lb) for the low-fat group and 6.0 kg (13.2 lb) for the low-carb group. Both groups noted other improvements in health factors, such as reduced waist size, body fat, blood sugar and blood pressure.
And the conslusion from this?
Researchers concluded that it is the quality, not the quantity, of the diet that helps people manage their weight in the long run. A key factor is learning to avoid adding sugar and eliminating processed foods that often have sugar and other additives hidden in them – relying instead on more plant foods to satisfy the appetite. Sounds very much like Michael Pollan’s Food Rules that I’ve discussed before:
Eat real food (not processed),
Mostly plants, and
Not too much!
It’s good to see that different researchers are coming to the same simple conclusion about what makes a diet healthy, after so many years of practically needing to be a chemist to understand the various chemicals and components of our food that we were supposed to include or eliminate. A good, healthy diet should be easy to follow… and eating a diet that is focused on plants and whole foods, with just enough to satisfy your hunger, is about as simple as it can get, I would say!
The photo above is my homemade seafood pizza - no additives, made from scratch! Nothing processed, no added sugar, and a few veggies added for balance. After years of counting calories and carbohydrates, scrutinizing food’s fat content for “good” omega fats or “bad” saturated fats, or checking the “glycemic index” measurement (how quickly the carbohydrates were converted to sugar) of various foods, I find it refreshing to finally have a simplified way to achieve a healthy diet. If you think so too, feel free to share with someone else who wants to simplify their life!
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