For decades now we have been told to lower our saturated fat to avoid heart disease and obesity from the extra energy intake.
The call has seen the rise of not only extensive educational campaigns in the name of our health but also a multi-billion dollar industry built around low-fat/fat-free/reduced-fat products and weight-loss strategies, employing such products to meet the goals of weight loss seekers and the health-conscious. However, reviews of research have now highlighted the lack of understanding around specific saturated fatty acids, which in turn has uncovered the reality that potentially not all saturated fat was bad for us – shock horror!
“One inescapable reality is that death is a trade-off,
and so is diet. You have to eat something!’Epidemiologist Hugh Tunstall Pedoe of the University of Dundee, U.K.
How did saturated fat get such a bad wrap?
The push against dietary saturated fat started in the 1950s and was largely based on the belief that dietary fat, in particular, saturated fat, raised cholesterol which in turn lead to negative health outcomes. Our understanding of the role of cholesterol began to improve which lead to the simple catch cry of ‘too much ‘bad fat’ = heart disease’, moved to ‘too much ‘bad fat’ = high cholesterol’. Around the 1970’s this evolved to ‘too much saturated and trans-fats = high VLDL and LDL cholesterol.
Do I still need to avoid saturated fat?
So, was the hype worth it? Do we still need to avoid foods high in saturated fat? Are the messages still valid? Has any of it worked? What is our current understanding and what implications does this have on our eating patterns and food choices?
Increasingly, research is uncovering that not all saturated fats (SFAs) are equally leading us to the belief that the classification of fatty acids based on double bonds (saturation) is no longer sufficient for describing their effect on health.
Of course, we must now ask the question about how relevant global recommendations for dietary fat intake are and if they need to be reconsidered. The Report on Fats and Fatty Acids (2010) from the Food and Agriculture Organization of the United Nations (FAO) suggests:
“… that individual fatty acids within each broad classification of fatty acids may have unique biological properties and health effects. This has relevance in making global recommendations because intakes of the individual fatty acids that make up the broad groupings will differ across regions of the world depending on the predominant food sources of total fats and oils.” pp 9, FAO, 2010.
What should we know about saturated fat & health?
What does the research say?
Consider this: we are generally eating less fat (though it’s argued by some still more than the ‘recommendations’), and while the rate of deaths from heart disease has dropped in many countries, the incidence has not. Logically, medical intervention may account in part for the decline in mortality rates in this case; however, there are some who suggest that the incidence of heart disease has not reduced because we have ‘thrown the baby out with the bathwater’. That is, we have not only reduced the consumption of dietary saturated fats but also of PUFAs (polyunsaturated fatty acids) and in some cases swapped SFAs for carbohydrates, which appears ineffective.
To eat or not to eat?
We know that SFAs have different effects on different health markers; some SFAs affect cholesterol, others don’t; some increase the risk of CVD others don’t. How do we know if a food is good for us? If you look at the studies you’ll find pros and cons for fatty foods such as red meat and dairy. Stearic acid (C18) found in reasonably high levels in meat (and dairy) (refer Figure 3) doesn’t appear to raise blood lipoproteins. However, consuming too much meat may pose a health issue due to its potential to raise the risk of certain cancers (ACS, 2006; Donaldson, 2004).
Dairy foods contributed to the intake of 15% of the total dietary saturated fatty acids and 10% to 16:0 and 18:0 (stearic) acid. Beef consumption accounted for 23% of the total saturated fat intake, highlighting the difficulty in ascribing a causal outcome to a single food group.”
German et al, 2009, pp193.
What about going low-fat?
Low-fat strategies have been around for a considerable period of time and increasingly it is being questioned if they are really working. Evidence in some cases suggests that low-fat diets have been ineffective strategies in the fight against many health issues (FAO, 2010).
FAO (2010) point out that studies which compared isocaloric diets (moderate carbohydrate and fat with controlled percentages of energy from macronutrients) to diets with different percentages of fat, (in predominantly overweight populations in developed countries), found that a higher percentage of energy from fat could result in greater weight loss than in those on low-fat diets.
Surely, if you are eating so much of a food that it is causing you health issues the obvious action to take is to address that, rather than beating yourself up and then switching to man-made products that cause their own health problems? Address imbalance, by focusing on a return to balance. Eat less of the foods that do you harm, switch them for foods you are lacking in and which will nourish you.
What’s the take-home message?
Simple! Eat a wide array of quality foods, that aren’t fiddled with too much. Don’t eat food based on guilt, enjoy your food as nature intended! And, remember sometimes science has to catch up to logic!
Written by Leanne Cooper
Director/Founder: Well College Global
Registered nutritionist and mother of two
Author, educator, presenter and nutrition consultant and adviser
PGCert HumNutr; BA (Pysch/Ed); Dip Nutr; PG Cert Higher Ed; TAE