Diets rich in unsaturated oils were associated with being judged older than diets low in unsaturated fats.

“in a study at the university of california photographs of two groups of people were selected pairing people of the same age one who had eaten an unsaturated fat rich diet the other who had eaten a diet low in unsaturated fats a panel of judges was asked to sort them by their apparent ages subject who consumed larger amounts of unsaturated oils were consistently judged to be older than those who ate less showing the same age accelerating effects of the incentive oils that were demonstrated by the rabbit experiments”