However, others subsequently examined animals infused with unsaturated oils and found that they became insulin resistant without any rise in ceramide, Summers said.

To keep your cardiovascular system young, consume unsaturated and non-hydrogenated (trans) vegetable oils, such as olive oil (monounsaturated), walnut oil (polyunsaturated) and flax seeds.

The unintended consequence of greatest concern is that fats and oils high in saturated fats, instead of the healthier unsaturated fats, might be used to replace fats and oils with trans fatty acids.