Myth: Oily skin is caused by a high-fat diet
iStock/Eva Katalin Kondoros
There is no research to back up the claim that a high-fat diet is to blame for oily skin, according to Dr. Garber. The truth is that oily skin is caused by excessive production of sebum by large sebaceous glands, according to the Journal of Skin Pharmacology and Physiology.
Myth: Your diet has no effect on oil production
Even though there is no clear link between a high-fat diet and excessive oil production, sugar consumption may play a role in causing oily skin. A high-sugar diet does not cause oily skin in all individuals, but certain people are more sensitive to the sugar in their diet, according to Dr. Garber. These are clear signs your diet has too much sugar.