Finally, as if the news was not bad enough already, high levels of omega-6 can prevent the body from converting the omega-3 that we get from plants to the more active omega-3 that we get from fish and animals. In other words, if the diet is already very high in omega-6 it doesn’t matter how many green vegetables you eat – their conversion into useful omega-3 will be blocked. So we have a compelling argument that, yes, a deficiency of an essential dietary nutrient – omega-3 – is a cause of obesity. This fits in with:

