If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
good Eades blog post
The largest criticism of low-carb diets seems to be that people are all
lying about eating more veggies and are in reality eating bacon cheeseburgers and therefore upping their fat intake significantly. I ran across the Yudkin study on Dr. Eades blog: http://www.proteinpower.com/drmike/2...ays-a-calorie/ In the Yudkin study, the low-carb instructions were "Essentially, the subjects were asked to take between 10 and 20 oz milk daily (about 300-600 ml), and as much meat, fish, eggs, cheese, butter, margarine, cream and leafy vegetables as they wished. The amount of carbohydrate in other food was listed in “units” with each unit consisting of 5 g carbohydrate; the subjects were told to limit these foods to not more than 10 units (or 50 g) carbohydrate daily." So it's not a very low-carb study or anything, as the 50g carb limit applied to "other" foods; the participants got a free pass on carbs in milk, cheese, cream and leafy veggies. When they looked at what people were actually eating on this diet, carbohydrate changed most, with study participants going from an average of 216g per day to 67g per day. Not terribly low carb, double what Bernstein recommends and triple what is allowed on Atkins induciton phase, but certainly a lot lower than a "normal" diet or the diet recommended by the ADA. Protein barely changed going from an average of 84g before the diet to 83g on the diet - so much for the myth of a high-protein diet. If you manage to cause yourself damage from "all that protein" on a low-carb diet, you'd be just as damaged on the normal pre-study diet. Fat *decreased* from 124g to only 105g per day. While eating "as much meat, fish, eggs, cheese, butter, margarine, cream and leafy vegetables as they wished," their fat intake went *down*. Apparently, the increased fat from meat and dairy was more than offset by the fat not used with carbs. Apparently, when you tell people they can eat all the bacon cheeseburgers they want, they eat a lot less fat as long as they aren't having french fries along with it. So much for the criticism of the diet having "too much fat." Obviously, with both a decrease in carbs and fat, the calories went down. The average dropped from 2330 to 1560 spontaneously. I say it was "spontaneous" because these folks were instructed to eat as much as they wished. No one was trying to limit calories, just carbs. The "problem" people have with this type of diet is it looks high-fat. It is over 60% of the calories from fat *even* though people cut their fat intake by an average of 19g per day! To me, this is a good example of why the whole notion of measuring foods in percentages is bogus. My own favorite example is a large salad with cheese and ranch dressing on top, which is a "high-fat" meal since almost all the calories are from fat, but becomes "low-fat" as soon as you add a couple cans of Coke and a dessert of candy to the meal. Obviously, the fat content doesn't change and the cans of Coke don't add anything good to the meal, so the whole notion of "high fat" vs. "low fat" isn't a useful distinction. How did people feel on the Yudkin diet? "In conformity with our experience with this diet during the last 15 years, none of our subjects complained of hunger or any other ill effects; on the other hand, several volunteered statements to the effect that they had increased feeling of well-being and decreased lassitude.” The Yudkin study is compared to the Keys study at the link to the Eades blog. The Keys study was not a diet study in terms of weight loss, but a starvation study to determine what would happen to people in concentraiton camps during the war. It had a similar level of calories - 1570/day. But in the Keys study, fat was at 17% of daily intake instead of over 60%. The people in the Keys study were locked-in to enforce the diet for 24 weeks, and went from a normal diet to the low-fat diet halfway through. So they were only on the low-fat diet for only 12 weeks. In the Keys study, protein was higher at 100g/day, carb was much higher at 225g/day and fat was very restricted at 30g/day. So we know the protein wasn't inadequate since it was higher than on the Yudkin study, the primary difference is lots of carb and little fat for the same total calories. The effect? "As the time wore on the men thought ceaselessly about food, they became lethargic, they were cold all the time, they became depressed, they developed bleeding disorders, their ankles became edematous, and some developed more serious psychological disorders." Lots more discussion at the Eades blog... and these studies are also discussed in Taubes book. -- http://www.ornery-geeks.org/consulting/ |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
A good, scientific blog | Bob in CT[_2_] | Low Carbohydrate Diets | 26 | June 1st, 2007 06:54 PM |
Eades blog | Joe the Aroma | Low Carbohydrate Diets | 1 | January 20th, 2006 03:07 AM |
Last post and good-bye | flyinfinn | Low Carbohydrate Diets | 44 | July 14th, 2005 11:41 PM |
Would it be appropriate to post the URL to my Diabetes Blog? | Aardvark | General Discussion | 15 | December 18th, 2004 01:18 PM |
Eades and Protein | Anthony | Low Carbohydrate Diets | 1 | October 9th, 2003 03:29 PM |