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Old 03-15-2009, 12:44 PM   #1
Kelsey Meyers
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The evidence for a low carb high fat diet

I compiled this list of studies to show some skeptical family members why I eat the way I do, I figured others out there might get some use out of it. Pass it along to friends, family, your doctor. The media chooses to ignore these studies, so it's up to us to spread the word.

1.) A ketogenic diet favorably affects serum biomarkers for cardiovascular disease in normal-weight men.
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There were significant decreases in fasting serum TAG (-33%), postprandial lipemia after a fat-rich meal (-29%), and fasting serum insulin concentrations (-34%) after men consumed the ketogenic diet...The results suggest that a short-term ketogenic diet does not have a deleterious effect on CVD risk profile and may improve the lipid disorders characteristic of atherogenic dyslipidemia.

2.) Very low-carbohydrate and low-fat diets affect fasting lipids and postprandial lipemia differently in overweight men.
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The short-term hypoenergetic low-fat diet was more effective at lowering serum LDL-C, but the very low-carbohydrate diet was more effective at improving characteristics of the metabolic syndrome as shown by a decrease in fasting serum TAG, the TAG/HDL-C ratio, postprandial lipemia, serum glucose, an increase in LDL particle size, and also greater weight loss.

3.) The effects of low-carbohydrate versus conventional weight loss diets in severely obese adults: one-year follow-up of a randomized trial.
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Participants on a low-carbohydrate diet had more favorable overall outcomes at 1 year than did those on a conventional diet. Weight loss was similar between groups, but effects on atherogenic dyslipidemia and glycemic control were still more favorable with a low-carbohydrate diet after adjustment for differences in weight loss.

4.) A low-carbohydrate as compared with a low-fat diet in severe obesity.
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CONCLUSIONS: Severely obese subjects with a high prevalence of diabetes or the metabolic syndrome lost more weight during six months on a carbohydrate-restricted diet than on a calorie- and fat-restricted diet, with a relative improvement in insulin sensitivity and triglyceride levels, even after adjustment for the amount of weight lost.

5.) A randomized trial of a low-carbohydrate diet for obesity.
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The increase in high-density lipoprotein cholesterol concentrations and the decrease in triglyceride concentrations were greater among subjects on the low-carbohydrate diet
The low-carbohydrate diet was associated with a greater improvement in some risk factors for coronary heart disease.

6.) A low-carbohydrate, ketogenic diet versus a low-fat diet to treat obesity and hyperlipidemia: a randomized, controlled trial.
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CONCLUSIONS: Compared with a low-fat diet, a low-carbohydrate diet program had better participant retention and greater weight loss. During active weight loss, serum triglyceride levels decreased more and high-density lipoprotein cholesterol level increased more with the low-carbohydrate diet than with the low-fat diet.
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Old 03-16-2009, 04:40 AM   #2
Robert Pierce
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Re: The evidence for a low carb high fat diet

I would also include these:

Weight Loss with a Low-Carbohydrate, Mediterranean, or Low-Fat Diet
http://content.nejm.org/cgi/content/full/359/3/229
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Mediterranean and low-carbohydrate diets may be effective alternatives to low-fat diets. The more favorable effects on lipids (with the low-carbohydrate diet) and on glycemic control (with the Mediterranean diet) suggest that personal preferences and metabolic considerations might inform individualized tailoring of dietary interventions.
The effect of a low-carbohydrate, ketogenic diet versus a low-glycemic index diet on glycemic control in type 2 diabetes mellitus
http://www.nutritionandmetabolism.com/content/5/1/36
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The diet lower in carbohydrate led to greater improvements in glycemic control, and more frequent medication reduction/elimination than the low glycemic index diet.

Last edited by Robert Pierce; 03-16-2009 at 04:40 AM.. Reason: Evidently I don't know how to embed a link
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Old 03-16-2009, 07:34 AM   #3
Darryl Shaw
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Re: The evidence for a low carb high fat diet

If low-carb high-fat diets are so healthy how do you explain the fact that the lowest rates of heart disease, cancer, diabetes and osteoporisis are found in countries where people traditionally eat a low-fat high-carb diet or the fact that the most longevous people on the planet consumed a diet that was ~80% CHO for most of their lives?
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Old 03-16-2009, 07:46 AM   #4
Nick Hanson
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Re: The evidence for a low carb high fat diet

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Originally Posted by Darryl Shaw View Post
If low-carb high-fat diets are so healthy how do you explain the fact that the lowest rates of heart disease, cancer, diabetes and osteoporisis are found in countries where people traditionally eat a low-fat high-carb diet or the fact that the most longevous people on the planet consumed a diet that was ~80% CHO for most of their lives?
Darryl - rather than just stating your case. Why don't you provide some studies that actually back it up? Also, I would be extremely curious to know if these high carb people that you speak of actually eat refined carbs or if they eat non refined (i.e. lots and lots of tubers). Please provide some evidence to the contrary.
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Old 03-16-2009, 08:06 AM   #5
Laura Kurth
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Re: The evidence for a low carb high fat diet

Well among the longest living countries in the world... here's a couple of tidbits that I found with a quick google search. Obviously this isn't very detailed.

Andorra - The diet in Andorra is based on consumption of meat, garden vegetables, and some fish. The most common winter dish, in rural and urban zones, is escudella, a soup of veal, chicken, potatoes, and vegetables. Some immigrant communities have different customs: Portuguese eat more cod and Indians, more vegetarian food. Normally, the midday meal is eaten near the workplace in a restaurant.

Okinawa - Pork appears so frequently in the Okinawan diet that to say "meat" is really to say "pork." Everything from head to tail is used. As the saying has it, only the "oink" and the toenails go begging. It is no exaggeration to say that the present-day Okinawan diet begins and ends with pork.
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Old 03-16-2009, 08:11 AM   #6
Laura Kurth
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Re: The evidence for a low carb high fat diet

Since you can find very healthy countries with a long life span that eat a largely plant based diet, and very healthy countries with a largely meat based diet... I believe the conclusion to be drawn is that it is not the macronutrient breakdowns per se that matter so much as

- a lack of processed foods (local food, home cooking etc. even if it does involve wheat and potatoes, it's not like here)

- low intensity physical activity on a large scale (walking a lot etc.)

- less stress (12 hour work days sitting on butts in front of computer to make the $$$)

- somewhat restricted calories (ie they are not 'gluttons')
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Old 03-16-2009, 10:18 AM   #7
Mike ODonnell
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Re: The evidence for a low carb high fat diet

Once you get enough protein.....debating the exact % of fats and carbs becomes less important. Quality of your foods is more important. That and longevity/diseases are more complex than magic ratios of food. More diseases are linked to high use of unstable fats, processed foods full of carcinogen, high insulin (chronic) and stressful lives. In the end....if low carb works for you....go for it, if higher (whole food) carbs works for you...go for it. People who eat less calories live longer too. If your insulin and stress factors are low....chances are you will live long and happy.
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Old 03-16-2009, 12:03 PM   #8
Scott Kustes
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Re: The evidence for a low carb high fat diet

What studies really show is that once you are eating real foods, the macronutrient breakdown is fairly unimportant. A high-carb low-fat diet based on meat/seafood, vegetables, fruits, nuts, and seeds is far, far healthier than a low-carb, high-fat diet based on processed foods.

Traditional cultures prove this time and again. The key wasn't macronutrient quantity, but unprocessed foods. Carb sources are predominantly tubers, not grains, in the healthiest tribes.
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Old 03-16-2009, 02:35 PM   #9
Robert Callahan
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Re: The evidence for a low carb high fat diet

Quote:
Originally Posted by Darryl Shaw View Post
If low-carb high-fat diets are so healthy how do you explain the fact that the lowest rates of heart disease, cancer, diabetes and osteoporisis are found in countries where people traditionally eat a low-fat high-carb diet or the fact that the most longevous people on the planet consumed a diet that was ~80% CHO for most of their lives?
TROLL ATTACK!!!!
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Old 03-16-2009, 02:39 PM   #10
Phillip Garrison
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Re: The evidence for a low carb high fat diet

Quote:
Originally Posted by Darryl Shaw View Post
If low-carb high-fat diets are so healthy how do you explain the fact that the lowest rates of heart disease, cancer, diabetes and osteoporisis are found in countries where people traditionally eat a low-fat high-carb diet or the fact that the most longevous people on the planet consumed a diet that was ~80% CHO for most of their lives?
What countries would those be? The mediteranean diet is moderate carb intake and high in fat, and they are universally considered to be the healthiest.
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