December 2021
In a curious chain of reductionist science, assumption, generalisation, extrapolation and failure to investigate ambiguous data, the western diet shifted from traditional, saturated animal fats to novel unsaturated vegetable oils in the space of a very few decades. Studies in the 1950s and 1960s linked the saturated fats in a typical American animal-based diet to increased risk of cardiovascular disease. This led to a dogma that all saturated fats are unhealthy and so, conversely, all unsaturated fats are healthy. Similarly, this logic extended to whatever is healthy for the heart is healthy for the rest of the body too.
As a result, soyabean oil has moved from having a negligible presence in the diet to constituting more than 60% of the edible vegetable oil which people are now eating instead of animal fats. Key to this shift, were US government subsidies to soya growers which helped soya to become a leading commodity crop. These subsidies later enabled the adoption of GM Roundup Ready soya in American agriculture too.
Soya oil is now ubiquitous in modern processed foods, margarines, salad dressings and snack foods, and is the oil of choice in many restaurants and fast food establishments.














