Friday, September 18, 2009
Saturated Fats Can Control Us
I heard about this study on the local news and I found it very interesting! Check it out:
NEW YORK — It's official. That tub of ice-cream really can control your brain and say "eat me."
A U.S. study by UT Southwestern Medical Center at Dallas has found that fat from certain foods such ice-cream and burgers heads to the brain.
Once there, the fat molecules trigger the brain to send messages to the body's cells, warning them to ignore the appetite-suppressing signals from leptin and insulin, hormones involved in weight regulation — for up to three days.
"Normally, our body is primed to say when we've had enough, but that doesn't always happen when we're eating something good," said researcher Deborah Clegg in a statement.
"What we've shown in this study is that someones entire brain chemistry can change in a very short period of time. Our findings suggest that when you eat something high in fat, your brain gets "hit" with the fatty acids, and you become resistant to insulin and leptin.
"Since you're not being told by the brain to stop eating, you overeat."
The researchers also found that one particular type of fat — palmitic acid which is found in beef, butter, cheese and milk, — is particularly effective at instigating this mechanism.
The study was performed on rats and mice but the scientists say their results, published in The Journal of Clinical Investigation, reinforced common dietary recommendations to limit saturated fat intake as "it causes you to eat more."
The study was conducted by exposing rats and mice to fat in different ways — by injecting various types of fat directly into the brain, infusing fat through the carotid artery or feeding the animals through a stomach tube three times a day.
The animals received the same amount of calories and fat and only the type of fat differed. The types included palmitic acid, monounsaturated fatty acid and unsaturated oleic acid which is found in olive and grapeseed oils.
"The action was very specific to palmitic acid, which is very high in foods that are rich in saturated-fat," said Clegg.
Isn't it interesting that we process healthy oils like olive and grapeseed differently than saturated fat, a.k.a. animal fats. So, let's rethink the next time we grab for the butter!
Here's some healthy recipes that use good fats - ENJOY!
Mandarin Salad
Makes 8 cups
1 T olive oil
1 t sesame oil
2 T lemon juice or rice wine vinegar
1 t honey
1 T soy sauce
4 cups fresh spinach
2 cups romaine lettuce, bok choy, or cabbage
1/2 cup chopped celery
2 green onions, sliced
1 small can mandarin oranges, drained
1/4 cup sliced, blanched almonds
Prepare dressing by stirring together oils, lemon juice, honey, and soy sauce. Tear spinach and lettuce into bite-sized pieces and toss with the rest of the ingredients and enjoy!
Apple-Pear Crisp
Makes 9 servings
Olive oil spray
2 medium apples, peeled, cored, and cut into 1" pieces
2 medium pears, peeled, cored, and cut into 1" pieces
1/4 cup frozen apple juice concentrate
1 T lemon juice
1 T plus 1/3 cup whole wheat flour
1 t ground cinnamon
1 cup uncooked oatmeal
2 T almond oil
1/4 cup chopped walnuts
2 T brown rice syrup
Preheat the oven to 350 degrees. Spray a 9x9 baking dish with olive oil. Mix apples and pears in a medium mixing bowl. Pour apple juice concentrate, lemon juice, 1 T flour, and 1/2 t cinnamon over fruit. Stir well and pour into the baking dish.
In another mixing bowl, combine 1/3 cup flour, 1/2 t cinnamon, oatmeal, almond oil, walnuts, and brown rice syrup. Sprinkle over fruit and bake for 40 - 50 minutes, or until brown and bubbly.
Eat Healthy Fats Intentionally!
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2 comments:
My ice cream's been telling me that for years!
Very interesting.
But they did all these tests on "mice" and little tiny mice. I just love those small hamburgers and the small ice cream cones. Just once in awhile... not all the time. :-)
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