 What does research say? Mr Batt said: Studies show the effects of vegetable oil like corn, soy, sunflower oil, palm oil etc in animals. Studies show increased rates of hypertension, blood lipid dysregulation, atherosclerosis, and endothelial blood vessel dysfunction all elements that lead to cardiovascular disease and blood clots. One such study, published in ... Certain cooking oils can raise risk of blood clots, expert warns... 