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I'm always skeptical when I hear "Nutrition recommendations" because it implies some sort of authority. Nutrition recommendations from who? The USDA? It's wort

I'm always skeptical when I hear "Nutrition recommendations" because it implies some sort of authority. Nutrition recommendations from who? The USDA? It's worth reading the history of the food pyramid. Here's a quote from wikipedia: "The first chart suggested to the USDA by nutritional experts in 1992 featured fruits and vegetables as the biggest group, not breads. This chart was overturned at the hand of special interests in the grain, meat, and dairy industries, all of which are heavily subsidized by the USDA.[10] If Americans followed the chart suggested, they would buy much less meat, milk, and bread. On the other hand, if they ate as the revised chart suggested, it "could lead to an epidemic of obesity and diabetes," as original composer of the food Pyramid, Louise Light warned. " I know from a personal standpoint, once I removed refined carbohydrates from my diet I dropped 25 pounds in two months (without bothering to excersize.) So the idea that somehow the diet that made me fat is somehow the "good" diet because the USDA says so strikes me as being silly.

calvano915 10y ago
Skepticism is important for any advice. MyPlate/USDA dietary guidelines are updated often, based on all the research and debunking that has happened before and since 1992. As I mentioned in another comment, it's a good place to start for most people. There is going to be some influences affecting their recommendations but most people can benefit from the overall approach. A diet with high carbs should be mostly complex carbs. There is no minimum refined carb recommendation. The only recommendation is to limit added sugars to <10% of daily kcals. That recommendation may be reduced further in later revisions.
- overgard 10y ago
  I think we both agree that complex carbs are better than refined ones, and there are foods that are somewhat heavy in carbohydrates that are still good for you (kale, for instance). I'm super skeptical that 45-65% of diet being carbohydrates is healthy though. Unlike proteins and fats carbohydrates don't have much nutritional value other than being useful for creating glucose. Since your body can synthesize glucose anyway, you don't really need that much. In terms of fiber, you can get that from vegetables. I don't necessarily think you have to cut out carbs completely and go on ketosis, but of all the major macronutrients carbs are the least useful, so it seems odd that they should be the vast majority of the diet, especially when we've known for at least a hundred years that carbohydrates are fattening. (I'm amused when people act like ketogenic diets are "new" -- historically high fat/low carb diets were common. And historically we didn't have an obesity problem.)
  - PepeGomez 10y ago
    "the body can synthesize glucose" is a horribly misleading statement. The body can create glucose only by destroying protein and the amount it can create is limited by the buildup of toxic waste the process leaves behind. It's absolutely not the same thing as the body synthesizing vitamin A from carotene. You will be much better off eating carbohydrates, and 45% may be still too little.
    - overgard 10y ago
      I've read a book[1] -- by an actual doctor -- saying the exact opposite. If you think about it from an evolutionary standpoint, our ancestors would have had many times when food accessibility was scarce and they would have needed to maintain their strength through a long fast. An animal that burned muscle/protein over fat is an animal that wouldn't have survived long, that would be a terrible evolutionary disadvantage. The design of our body isn't stupid -- we store fat for a reason, so that we can burn it in times when food is scarce. Burning fat for energy is both normal and totally healthy. From a personal standpoint, I barely eat any carbs and I've lost zero strength despite dropping 25 pounds. Apparently the diet that has made me thinner and increased my energy and mental clarity is the "dangerous" one, and the diet that has made everyone obese is "healthy" and "balanced". [1] The Obesity Code by Dr. Jason Fung
      - calvano915 10y ago
        Fats do not become glucose (with the exception of the glycerol from triglycerides...a minute amount of the total kcals from one trig) but they do become energy. The majority of energy is in fatty acids which have no pathway to glucose. For example, it is believed that when we sleep our energy comes from fats. We are not doing anything exerting, so the process of (fat catabolism -> energy) >= energy needs. The brain needs glucose however, so it gets it from glycogen catabolism or protein catabolism (gluconeogenesis). Edit: For some reason I cannot reply to the comment below. The recommendation is 45-65% based upon individual need. I've mentioned elsewhere in this thread that the brain can use ketone bodies. I disagree that glucose = obesity as you seem to see it. Many, many things (nutrition, PA, stress, hormone issues, etc) are related to obesity. A lot of what you emphasize is related to the lack of physical activity that the population no longer gets. If we truly want to solve obesity, it takes adjustments to diet and consistent purposeful physical activity. There's a lot that can be done with nutrition, but continuing our highly sedentary ways will always have consequences for health that nutrition alone will not completely solve.

calvano915 10y ago

Skepticism is important for any advice. MyPlate/USDA dietary guidelines are updated often, based on all the research and debunking that has happened before and since 1992. As I mentioned in another comment, it's a good place to start for most people. There is going to be some influences affecting their recommendations but most people can benefit from the overall approach. A diet with high carbs should be mostly complex carbs. There is no minimum refined carb recommendation. The only recommendation is to limit added sugars to <10% of daily kcals. That recommendation may be reduced further in later revisions.

overgard 10y ago
I think we both agree that complex carbs are better than refined ones, and there are foods that are somewhat heavy in carbohydrates that are still good for you (kale, for instance). I'm super skeptical that 45-65% of diet being carbohydrates is healthy though. Unlike proteins and fats carbohydrates don't have much nutritional value other than being useful for creating glucose. Since your body can synthesize glucose anyway, you don't really need that much. In terms of fiber, you can get that from vegetables. I don't necessarily think you have to cut out carbs completely and go on ketosis, but of all the major macronutrients carbs are the least useful, so it seems odd that they should be the vast majority of the diet, especially when we've known for at least a hundred years that carbohydrates are fattening. (I'm amused when people act like ketogenic diets are "new" -- historically high fat/low carb diets were common. And historically we didn't have an obesity problem.)
- PepeGomez 10y ago
  "the body can synthesize glucose" is a horribly misleading statement. The body can create glucose only by destroying protein and the amount it can create is limited by the buildup of toxic waste the process leaves behind. It's absolutely not the same thing as the body synthesizing vitamin A from carotene. You will be much better off eating carbohydrates, and 45% may be still too little.
  - overgard 10y ago
    I've read a book[1] -- by an actual doctor -- saying the exact opposite. If you think about it from an evolutionary standpoint, our ancestors would have had many times when food accessibility was scarce and they would have needed to maintain their strength through a long fast. An animal that burned muscle/protein over fat is an animal that wouldn't have survived long, that would be a terrible evolutionary disadvantage. The design of our body isn't stupid -- we store fat for a reason, so that we can burn it in times when food is scarce. Burning fat for energy is both normal and totally healthy. From a personal standpoint, I barely eat any carbs and I've lost zero strength despite dropping 25 pounds. Apparently the diet that has made me thinner and increased my energy and mental clarity is the "dangerous" one, and the diet that has made everyone obese is "healthy" and "balanced". [1] The Obesity Code by Dr. Jason Fung
    - calvano915 10y ago
      Fats do not become glucose (with the exception of the glycerol from triglycerides...a minute amount of the total kcals from one trig) but they do become energy. The majority of energy is in fatty acids which have no pathway to glucose. For example, it is believed that when we sleep our energy comes from fats. We are not doing anything exerting, so the process of (fat catabolism -> energy) >= energy needs. The brain needs glucose however, so it gets it from glycogen catabolism or protein catabolism (gluconeogenesis). Edit: For some reason I cannot reply to the comment below. The recommendation is 45-65% based upon individual need. I've mentioned elsewhere in this thread that the brain can use ketone bodies. I disagree that glucose = obesity as you seem to see it. Many, many things (nutrition, PA, stress, hormone issues, etc) are related to obesity. A lot of what you emphasize is related to the lack of physical activity that the population no longer gets. If we truly want to solve obesity, it takes adjustments to diet and consistent purposeful physical activity. There's a lot that can be done with nutrition, but continuing our highly sedentary ways will always have consequences for health that nutrition alone will not completely solve.