The new USDA Food Pyramid was recently released. Besides the graphic description of the new recommendations that looks like a Jackson Pollock painting, is there anything in those recommendations that should be of interest?
First, the good points. It recommends consuming more protein, which causes the release of the hormone GLP-1, which travels to the brain via the vagal nerve to reduce hunger. Currently, the percentage of protein in the American diet is about 15 percent of total calories. Doubling the daily protein intake to 30 percent of total calories is well within the upper limit (no more than 35 percent of total calories), as recommended by the National Academy of Medicine. Unfortunately, the recommendation of protein intake based on body weight is misleading. It should be based on your lean body mass, not total weight. Your total body weight includes a lot of stored fat that doesn’t need any protein to maintain it. So here is my recommendation on protein intake. Make sure you eat at least 90 grams of protein per day (ideally evenly spaced over three meals to maintain increased satiety), but no more than 120 grams of protein per day unless you are an athlete. Eating excess protein will inhibit AMPK, the master switch of your metabolism, making it more challenging to burn excess body fat.
The second good point in the new recommendations is to eat more vegetables and fruits. However, they missed the key point that most of those carbohydrates should consist of non-starchy vegetables, since they are rich in fermentable fiber, which is essential for gut health, but low in simple sugars (glucose and fructose), unlike fruits. But you are probably thinking that fruits taste better than vegetables. You are correct because fruits are exceptionally rich in simple sugars like glucose and fructose that inhibit AMPK. If AMPK is inhibited by eating too much fruit, your ability to burn excess body fat is inhibited. So, eating more non-starchy vegetables, balanced with the right amount of protein, and easing off on excess sugar-laden fruit is a great starting point for a healthier America.
OK, what did the new food pyramid miss? The primary mistake is not understanding the role of fat in driving inflammation. There is no distinction in the new food pyramid between pro-inflammatory fat and non-inflammatory fat. Pro-inflammatory fat is rich in either palmitic acid or arachidonic acid. Red meat (especially fatty red meat) is rich in both. Dairy products tend to be high in palmitic acid. Thus, if you increase your protein intake, it should come from chicken, fish, or non-fat Greek yogurt, not from red meat or full-fat dairy products (especially butter and cheese).
But the critical part that the new pyramid ignores is the lack of any mention of calorie restriction. This is why GLP-1 drugs work. These drugs stop hunger by increasing GLP-1 levels in the body by injecting it, rather than relying on the diet to generate its natural release from the gut. Thus, as you increase your protein consumption, the need for injectable GLP-1 drugs is eliminated. With the right balance of protein-to-carbohydrates at each meal, you can also restrict calories without hunger, thus making fat loss easy to achieve and maintain on a lifelong basis. You can do it naturally by consuming adequate, but not excessive, protein, balanced with plenty of non-starchy vegetables and less fruit, and a dash of non-inflammatory fat. That’s an excellent description of the Zone diet. Using the Zone diet, you activate AMPK in every one of your 30 trillion cells in your body, to burn fat faster as your metabolism becomes more efficient. Making your metabolism more efficient also reduces the driving force for many chronic diseases, such as diabetes, heart disease, and liver disease. However, if you eat too much protein, like on a ketogenic diet, you will inhibit AMPK, and your metabolism becomes less efficient. Thus, you need enough protein at a meal to stimulate GLP-1 release, but not too much to inhibit AMPK activation. And if you consume too much inflammatory fat, such as palmitic acid or arachidonic acid, you create inflammation that also drives the development of chronic disease.
The recommended daily protein intake of the Zone diet is 90 to 120 grams per day (ideally spread equally over three meals), with the overall diet consisting of 30 per cent protein. If you calculate your daily calorie intake based on your protein intake, it should be between 1,200 and 1,500 calories. The protein would contribute 360 to 480 calories per day, and the remaining calories would come from an approximately equal caloric balance of low-glycemic carbohydrates (i.e., primarily non-starchy vegetables and a little fruit) and non-inflammatory fat (i.e., monounsaturated fat). This level of total calorie intake (1,200 to 1,500 calories per day) is approximately what people using GLP-1 drugs consume, and they don’t complain about hunger (however, they have other side effects that lead to more than 50 percent stopping their use of GLP-1 drugs within the first year).
The government could have saved itself a lot of money by just telling Americans to follow the Zone diet, since its recommendations haven’t changed in 30 years. Another benefit is that the resulting food pyramid wouldn’t look like a Jackson Pollock painting.
