Names of Omegas fats: Terminology derives from the first double bond- one encounters from the end of the molecule, the carbon chain of the fatty acid. [depend on the location of first double bond] ▪ Omega-3 fats ▫ Good for us ▪ Omega-6 fats ▫ Questionable ▫ Because they have inflammatory properties Meta-analysis showed no significant evidence that saturated fats INCREASES risk of heart disease -No doubt that saturated fats can INCREASE blood cholesterol, but do not INCREASE risk of heart disease Study conducted in Japan: saturated fat intake is INVERSELY associated with stroke incidents This means, the most saturated fat people consumed, the lower the incidence of stroke Important to remember: Always difficult to focus on just ONE nutrient because a reduction in one means an increase in another & vice versa Harvard study (Women’s Health Initiative) looked at data in a large number of women over 8 years & there was no difference in coronary heart disease rates based upon diets -Whether they ate more/less fats, more/less vegetables -Of course, there’s studies with totally opposite results -Fact is, there is a lot of controversy in this topic - Commonly held belief is that the best diet for prevention of heart disease is a low saturated fat, low cholesterol diet but it’s not supported by the evidence we have so far from clinical trials (human trials, which are the most important)
Paper recently published in the British Medical Journal by a cardiologist called “Saturated Fat's Role in Heart Disease Is a Myth” Created a lot of controvery about saturated fats Caused arguments back & forth In the same issue, there was another article about palm oil which is a classic saturated fat & it claimed that if palm oil consumption was DECREASED in India, it would have a very significant impact on heart disease ● But as mentioned before, evidence is not strong Another study done shows inverse relationship Activity: Dietary Fat Monounsaturated Fat: Does not affect cholesterol levels and is considered to be biochemically neutral. Omega Fatty Acids (Omega3 & Omega6): These fats belong to the class of fats called “Polyunsaturated Fat” Low Fat/Low Cholesterol Diet: There is no clear answer why this diet is beneficial. There is no clear proof that reducing fat intake will have a beneficial effect on one’s cardiovascular health.
Must be careful interpreting data because the countries included in this study have very different diets, exercise habits (many variables overall) compared to our lifestyle Less saturated fat, more heart disease: Kazakstan, Georgia, Ukraine More saturated fat, less heart disease : Ireland, Norwat, Findland, Italy, France, Switz, Iceland, Austria, Germany [no conclusive evidence] French paradox High cholesterol but lower incidence of heart disease Usual explanation is resveratrol found in red wine It’s questionable because death certificates aren’t filled out the same way in France as they are in N.A
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