Joking aside, we have been given an incredible amount of dissenting advice regarding our diets. Previously, we were told about the dangers of fat and cholesterol only to find that the 'trans-fats' that replaced them in our diet (in products such as margarine), were even more deadly. Now we are told that carbohydrates are the bogeymen, the overconsumption of which is cause for much of the obesity that plagues Western society (Atkins diet anyone?). We should eat more fish because they contain Omega-3s which is the new holy grail for everything from reduced cancer risk to better brain cells. But fish may also contain harmful substances like mercury.
Michael Pollan, in his book In Defence of Food, nicely deflates the prevailing trend towards 'nutritionism' where food is not seen as food but as an item made up of calories and nutrients. He brutally de-bunks nutritionism, showing how it is unreliable at best, and bad science with links to the food and medical industries at its worst. Nutritionism, to a degree, has become a blanket excuse to create processed foods, with studies commissioned by the food industry showing nutritional benefits of whatever food they are asked to assess. Pollan states rather cynically that a qualified FDA health claim for any product amounts to a euphemism for "all but meaningless". By the end of the book, you are rather inclined to agree, especially when you read about a chair in "Chocolate Science" being endowed by the Mars Corporation at the University of California Davis.
One of the worst failings that Pollan documents involves the so-called 'lipid hypothesis' linking the rise in heart disease (and other illnesses) to consumption of fats and cholesterol. That led to a drastic change in diets - not necessarily for the better as it turns out. Pollan rightly points out the manichean nature of dietary advice - previously protein was bad and carbs were good, now carbs are bad and protiens are good. The only thing that is universally acclaimed to be generally pretty harmless and actually quite beneficial is leaves and fruit and that goes to the heart of Pollan's advice for what we should eat.
Pollan also rightly points out that the reductionist nature of nutritionism just doesn't work. Scientists enjoy isolating an individual vitamin, mineral or nutrient within a particular foodstuff and praising or blaming it for having beneficial or deleterious effects on your health, but ultimately foods themselves are highly complex agglomerations that defy analysis. So is it really the Omega 3 fatty acids alone that makes fish such a nutritional food? Or is it the Omega 3s working in conjunction with other individual proteins in fish that has some effect during the digestion process? The most basic but crucial thing that Pollan does is to emphasize that we have to once again think about food, as well food.
Ultimately, I have distilled from Pollan's book a small number of simple maxims with the aim of eating more healthily but also being able to enjoy food a lot more. He presents about two dozen or so simple and sensible general rules which you will be well advised to check out. After finishing the book I have resolved to:
- Set aside specific time for eating as a sole activity and spend more time eating - no eating in front of the TV, or computer, or at a desk while finishing work.
- Have more meals with other people - good company and excellent conversation makes a meal that much more enjoyable, and actually reduces the amount you eat.
- No snacking - eat three square meals and avoid having little snacks in between. So no nuts, crisps, chicken wings etc.
- Stop eating junk food or fast food - there are far far better ways to spend $7 than on a upsized Big Mac Meal; there are also much better ways to spend $4 than on a pack of Lays potato chips.
- Eat more green, leafy vegetables - try having 2 servings of vegetables and 1 serving of meat for dinner instead of the other way round.
- Eat fruit more regularly - try to have freshly squeezed fruit juice at hawker centers/foodcourts. One serving of fruit after dinner.
- Cut down on the amount of meat you eat - fish and seafood might be better options. Perhaps choose a day where you can forgo meat entirely (a la Catholics on friday).
- Avoid any kind of food that looks like it is processed. If it didn't once look alive, don't buy it.
- Cut down on alcohol consumption - you don't have to go teetotal but binge drinking is generally a very bad idea. Also if you are going to drink, try a glass of red wine every evening rather than beer or spirits.
- Learn to cook - what better way of really understanding what on earth you are eating? Plus it will make you appreciate and enjoy food all the more.
- Taking supplements - the jury is still out whether supplements are really all that effective. However, it is also true that modern factory farming has resulted in foods that give much higher yields but lower nutrient values. It may be worth taking a multivitamin.
- Portions - Is it better to have five small meals a day rather than the traditional three solid meals? It is worth finding out the evidence on either side. Will it be too much of a hassle to change?