Despite recent headlines that saturated fats may not be as bad as originally believed, the American Heart Association says that clinical trials clearly show that replacing saturated fat in the diet with polyunsaturated fat
reduces the incidence of cardiovascular disease.
are essential - the body cannot make them on their own and thus need they need to be obtained from the diet.
'People who replaced saturated fats with unsaturated fats - especially polyunsaturated fats
- had significantly lower risk of death overall during the study period, as well as lower risk of death from cardiovascular disease, cancer, neurodegenerative disease, and respiratory disease, compared with those who maintained high intakes of saturated fats,' said the study.
The good fats are not just good for the heart but also for the brain, especially polyunsaturated fats
which contain omega-3s.
The research findings challenged well-established guidelines on fat consumption promulgated by the American Heart Association (AHA), which encourage the consumption of cholesterol-lowering polyunsaturated fats
to avoid the dangers of saturated fats, which are thought to boost levels of "bad" blood-vessel-clogging LDL cholesterol.
And polyunsaturated fat
intake did not offer any heart protection.
Saturated fats tend to increase the amount of cholesterol in the blood - polyunsaturated fats
and monounsaturated fats have the opposite effect.
The dogs, who work in a variety of jobs here and abroad from sniffing out bombs to uncovering contraband, performed better in exercise and detection tests with a simple change in diet--one higher in polyunsaturated fats
. The diet appears to help them return to lower body temperatures after exercise, which may result in less panting and greater sniffing.
Healthy fats include monounsaturated and polyunsaturated fats
, which are found primarily in plant foods--nuts and nut butters, seeds, avocados, and vegetable oils--as well as in some types of fish.
The researchers found that sunflower oil, which is high in polyunsaturated fats
, produced more toxic aldehydes more quickly than olive oil, which is high in monounsaturated fats.
A study published today in the British Medical Journal finds that people who followed health advice and ate certain omega-6 polyunsaturated fats
instead of animal fats had higher death rates.
The study participants first ate a Mediterranean diet-type meal of salmon, almonds, and vegetables cooked in olive oil; 51 percent of the meal's calories came from monounsaturated and polyunsaturated fats
. The second meal consisted of a sausage, egg and cheese sandwich and hash browns, for 58 percent of calories from saturated fat.