While the concept of cooking food marked a turning point in the history of mankind by increasing the bioavailability of a lot more nutrients, it can also be responsible for destroying vitamins. Read our advice on the best cooking methods for preserving all your food’s vitamins and nutrients.
Since 2009/2010, many primatologists and palaeologists have agreed on how important mastering fire and cooking food was to mankind’s development of (1).
In fact, cooking makes the macronutrients present in food, especially the protein and carbohydrates (particularly fibre), more digestible and bioavailable, and ultimately maximises the calorie intake of the food consumed (2).
As a result of this development, humans spent less time chewing and looking for food . Their jaws narrowed, allowing more space for the brain to develop, and they were able to devote time and energy to creating ritual, artistic and social practices, etc. Cooking can thus be said to mark the real birth of Humanity.
However, it has also brought some disadvantages. So, after 2 million years of evolution, perhaps it’s now time to use our acquired knowledge to adopt beneficial ways of cooking which preserve all our food’s vitamins and nutrients.
Before we consider what becomes of the vitamins, minerals and other nutrients during cooking, let’s first look at what happens to fatty acids when we heat an oil (3).
Once an oil’s ‘smoke point’ has been exceeded, its fatty acids break down. Not only are their benefits destroyed, but they produce compounds which are potentially toxic for the body. So when it comes to cooking, despite its high omega-3 content, swap your rapeseed oil for olive oil, grape seed oil, soya oil or coconut oil, all of which are able to withstand the high temperaturesgenerated by pan-frying or cooking in a wok.
Now what about vitamins, so sensitive to the effects of cooking. In fact, the majority of vitamins present in food, especially fruit and vegetables, are destroyed by cooking’s high temperatures, as the following table shows (4):
Nutrient | Degradation temperature |
Vitamin A | 110°C |
Vitamin B | 120°C |
Vitamin C | 60°C |
Vitamin D | 110°C |
Vitamin E | 120°C |
Mineral salts | 100°C |
A number of conclusions can be drawn from this summary of cooking temperatures and their impact on vitamins:
It appears there are two optimal cooking methods for producing dishes that are not only full of flavor but also rich in vitamins (5):
“There’s nothing quite like a good piece of meat, well-grilled on the outside, with its caramelised juices forming a delicious crust that keep all the meat’s juices inside”, our carnivore friends tell us. And they’re right … as far as taste is concerned. But from a dietary or health point of view, it’s a somewhat different matter.
Bread crust, hints of malt, caramel and gingerbread: discovered at the beginning of the 20th century by the French chemist who gave it its name, the Maillard reaction is the creation of specific compounds produced when sugars and proteins combine. Now while these Maillard reaction-induced compounds may be mouth-watering, they are medically problematic (6).
Indeed, they are also known as Advanced Glycation End products (AGEs). On average, 10% of these AGEs accumulate in the body and at excessive levels, can cause adverse effects and thus contribute to aging (7).
So while it’s fine to occasionally eat grilled/roasted/barbecued meat, it’s important not to overdo it ! You can also mitigate the effects of AGEs by taking a banaba extract (a plant which helps to metabolise glucose), carnosine (an amino acid extensively studied by glycation specialists), benfotiamine (a form of vitamin B1 which is good for the heart), etc. Certain targeted dietary supplements contain all these compounds (such as Anti-Glycation Formula).
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