In recent years government dietary advice has increasingly focused on low-fat diets and calorie-control as the key to health, longevity and avoiding obesity. For me and a growing wave of like-minded researchers, this is a fundamental misreading of the available science, and the very denigration of nutrient-dense fats, with their immune-supporting fat-soluble vitamins, cholesterol, choline, etc, is doing its part to increase obesity, heart disease, cancers, type 2 diabetes, learning/behavioural conditions, lowered IQ and nameless other diseases. But in this study evidence shows the devastating effects of restricting calories in conception and early pregnancy, leading to the increased likelihood of obesity and type 2 diabetes in the parent’s offspring.
Currently the Food Standards Agency still promotes a low-fat diet even in pregnancy, focussing on lean meats and low-fat dairy. This is a crucial time for a baby in which its requirements for saturated fats, cholesterol and vitamins A, D and K in particular must be met to protect it against birth defects. These nutrients simply aren’t available from plant fats and seed oils (the ones we’re supposed to be eating). Furthermore there is some suggestion that low-fat dairy consumption is actually correlated with poor ovulation and therefore infertility:
So the best recommendation I can give if you want to get pregnant? Eat the fat on meat (as well as oily fish), eat free range eggs, full-fat cream, milk and yoghurt, grass-fed butter, and take some good quality cod liver oil.