Carbs vs. protein vs. mono fats.
The OmniHeart Trial gave men and women with high blood pressure or pre-hypertension one of three diets that had roughly equal amounts of saturated fat, sodium, potassium, calcium, fiber, and calories. However:
* the higher-protein diet had slightly more beans, low-fat dairy foods, poultry, and egg substitutes,
* the higher-carb diet had more sweets and desserts and slightly more fruit and juices, and
* the higher-mono diet had more fats and oils and slightly more vegetables.
Compared to the higher-carb diet, the higher-protein diet lowered blood pressure, LDL ("bad") cholesterol, and triglycerides (that's all good), but it also lowered HDL ("good") cholesterol (that's bad).
Compared to the higher-carb diet, the higher-mono diet lowered blood pressure and triglycerides and raised HDL cholesterol (that's all good) and had no effect on LDL.
What to do: Either higher-protein or higher-mono diets beat higher-carb diets, say the authors. But their results might not apply to a higher-carb diet rich in whole grains rather than sweets and desserts.
In any case, it makes sense to replace bad fats (in fatty meats, high-fat dairy, butter, etc.) with beans, vegetables, low-fat dairy foods, oils, and nuts instead of desserts, sweets, and fruit juices. But don't go overboard: none of these diets were extremely high or low in protein, fat, or carbs.
Journal of the American Medical Association 294: 2455, 2497, 2005.
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|Publication:||Nutrition Action Healthletter|
|Article Type:||Brief Article|
|Date:||Jan 1, 2006|
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