For 60 years, Western health authorities have recommended reducing our consumption of saturated fats. But what does current scientific research have to say about their actual effects on health?
Fatty acids are part of the family of lipids. They are formed from a chain of carbon atoms attached to hydrogen atoms, completed by a carboxylic acid group (-COOH).
In chemical terms, a fatty acid is referred to as saturated if it has the maximum number of hydrogen atoms attached to every carbon atom, in other words, if it is saturated with hydrogen atoms (1).
That’s what makes a saturated fatty acid different from an unsaturated one; the latter is not saturated in hydrogen because of the presence of carbon-carbon double bonds in its structure.
Fatty acids that only contain one carbon-carbon double bond are known as monounsaturated; those containing several are polyunsaturated.
Though not considered essential because the body can synthesize them, saturated fatty acids are nevertheless necessary for health and are found in their natural state in a wide range of foods (2).
They are present at low levels, for example, in sunflower and olive oils (around 10%-13%), and make almost all the fatty acids in coconut oil.
However, it’s primarily in animal-source products, specifically animal fats, where we find saturated fatty acids. They represent 20%-35% of the lipids in fish and poultry, and 30%-45% of those in pork and beef. Lard, for example, obtained from the fatty tissue of pigs, is known to contain a high proportion of saturated fats.
Dairy products (butter, cheese …) contain 60%-65% saturated fatty acids, because cow’s milk (like human breast milk) contains a significant proportion of saturated fatty acids. (3).
Unsaturated fatty acids are predominantly found in nuts and oilseeds (walnuts, peanuts, sesame seeds, etc.), soya, vegetable oils other than coconut and palm oil, as well as oily fish (salmon, sardines, mackerel, etc.) (4).
To capitalize on their health benefits, many people choose sources rich in omega-3 fatty acids, such as Calanus oil, a nutritional gem from the Arctic, rich in EPA and DHA which support healthy heart function. Pumpkin seed oil meanwhile, contains high levels of polyunsaturated fatty acids such as oleic and linoleic acids.
Since the 1960s, many studies have shown a correlation between consumption of saturated fatty acids and increased cholesterol levels, particularly the LDL form known as ‘bad cholesterol’ (5-6).
It has already been widely demonstrated that an increase in the proportion of LDL in total cholesterol, ie, that which also includes the HDL form, promotes the onset of cardiovascular disease (7).
However, this is still a controversial point. Other studies suggest that while saturated fatty acids do indeed increase levels of LDL cholesterol, they do the same to HDL levels. Hence the proportion of LDL cholesterol stays the same and it’s therefore possible that these fatty acids carry no risk to health (8).
What’s more, it seems that the increase in LDL (low-density lipoproteins) promoted by saturated fatty applies only to those with a large particle size, which are not associated with an elevated risk of cardiovascular disease. Thus, far from being unhealthy, dark chocolate - rich in saturated fatty acids - is good for cardiovascular health (9)!
That’s not to say, however, that you should feel free to eat as much saturated fat as you like. Foods high in saturated fat are more calorific and may promote weight gain, which is indeed a risk factor for cardiovascular disease, hence the importance of maintaining a good balance in your consumption of fats. After all, we know that Mediterranean and Asian diets offer proven health benefits.
Further studies are needed to test these various theories. It’s also worth noting that black garlic is recognized as an effective natural remedy for combatting cholesterol and promoting good cardiovascular health (it can be found in the supplement Organic ABG10+, standardized to 0.1% S-allyl-cysteine, the active ingredient in black garlic). Some people also choose to take vitamin B5 (especially in its patented form Pantethine) or statin substitutes (such as Sytrinol).
On the ‘minus’ side, several studies have consistently shown that there are immediate effects from consuming saturated fatty acids on concentration, reaction times and function of the mesocorticolimbic system (10-11).
Not only does a diet high in saturated fatty acidsimpair cognitive ability, but it also significantly diminishes mesocorticolimbic function, causing the brain to compensate, and reinforcing reward-seeking behavior. Researchers have concluded that a diet high in saturated fatty acids harms the brain circuits directly related to mood disorders, substance abuse, and over-eating.
It’s therefore not quite for the reasons cited over the last 60 years that we should reduce our consumption of saturated fatty acids, but more particularly, for maintaining brain health and positive mood.
As well as monitoring your diet, you also have the option of taking dietary supplements targeted at cognitive health and performance (such as Neurex and Smart Pills).
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