The Skinny on Why We Get Fat

It's not just a matter of consuming more calories than you burn.
an apple with a measuring tape wrapped around it

We have been told that all it takes to lose weight is a reduction in calories and/or an increase in exercise. The theory goes that if we eat fewer calories or exercise more or both, we will lose weight.

Yet, we continue to struggle with losing weight and keeping it off. Only a small percentage of overweight and obese people maintain a weight loss of 10 percent of body weight for one year. The reason for this goes beyond the simple calories in/calories out calculation. What researchers are discovering is that a calorie is not just a calorie. Rather, it’s the quality of the diet as a whole that determines whether a person will be able to lose weight and keep it off or not.

The New Model of Obesity

A paper published in the Journal of the American Medical Association proposes a new model of obesity that better explains why and how we get fat. The current model states that the standard American diet (SAD), full of convenient, highly palatable, energy-dense foods, causes people to overeat, which increases energy intake (calories in), while a sedentary lifestyle decreases energy expenditure (calories out). As a result, circulating fuels in the bloodstream (glucose from sugar and carbs, fatty acids from fats, and ketones from proteins) are more available, which increases fat storage and leads to obesity.

The new model proposes that diet quality— especially carbohydrate amount and type—as well as genetics and lifestyle factors such as inadequate sleep and stress, all contribute to an increase of fat storage, which decreases the circulating fuels in the bloodstream (sugar, fat, and ketones), triggering hunger (calories in) and lowering metabolism (which lowers the burning of calories). The result—obesity.

This new model helps explain why a calorie is not just a calorie and supports the fact that a lowcarbohydrate diet versus a low-fat, high-carbohydrate diet of equal calories results in better weight loss, blood sugar control, and cholesterol levels. It also explains why a low- versus high-glycemic index diet (glycemic index measures the ability of a food to raise blood sugar) of equal calories decreases hunger.

Other dietary factors that decrease fat storage are a low refined sugar intake, high omega-3 and low transfat intake, adequate protein, high micronutrient and phytochemical content (in other words, plenty of fruits and vegetables), and probiotics and prebiotics.

You may think that overeating causes you to be fat, but it’s actually a poor quality of diet that causes overeating, which causes you to be fat.

How to Improve Diet Quality

Here are some tips:

  • Eat plenty of nonstarchy vegetables and low-sugar fruits.
  • Eliminate sugar and grains.
  • Eat healthy fats such as omega 3 (fish oil), omega 9 (olive oil), and medium-chain triglyceride saturated fat (coconut oil), and reduce your intake of unhealthy omega-6 fats (most vegetable oils).
  • Eat protein throughout the day.
  • Eat fermented foods, which contain beneficial bacteria.

In conclusion, following these dietary suggestions along with moderate caloric restriction with optimum nutrition, exercise, and stress reduction not only leads to permanent weight management, it is also the recipe for adding years to your life as well as life to your years.

Click to See Our Sources

“Long-term weight loss maintenance in the United States” by J.L. Kraschnewski et al., International Journal of Obesity (Lond)

“Increasing adiposity: Consequence or cause of overeating?” by D.S. Ludwig and M.I. Friedman, JAMA

“Low glycemic load experimental diet more satiating than high glycemic load diet” by K.T. Chang et al., Nutrition and Cancer

“Weight loss with a low-carbohydrate, Mediterranean, or low-fat diet” by I. Shai et al., New England Journal of Medicine

Contributor

Brenda Watson, CNC

Owner of Vital Planet

For more than 30 years, Brenda Watson, CNC has been helping people achieve vibrant health through improved digestion.

As an author of eight books, a New York Times bestseller, and the creator of five PBS shows on digestive health, Brenda continues the crusade of teaching how the gut is the foundation of your health.