Is sesame oil comedogenic?

A vegetable oil is classified as comedogenic when it has the ability to create an occlusive film on the skin's surface. This film can potentially clog pores and thus block the evacuation of sebum, which promotes the appearance of skin imperfections. For individuals with oily or acne-prone skin, the application of a comedogenic oil can lead to a worsening of their skin condition. The comedogenic nature of oils is evaluated on a scale ranging from 0 to 5. An ingredient is said to be non-comedogenic when its comedogenicity index is 0. It is considered slightly comedogenic when its index is 1 or 2. On the contrary, an oil with an index between 4 and 5 is considered comedogenic and should be avoided by individuals with oily skin.

The comedogenicity index is influenced by various factors, including the oxidative potential of the oil, that is, its sensitivity to oxidation. This can be triggered by exposure to heat, UV rays, oxygen in the air, or from a problem with the oil's preservation. Oxidation increases comedogenicity. Moreover, the quality of the oil influences its comedogenic potential. Generally, vegetable oils extracted by cold pressing are less likely to clog pores. Finally, the rate at which the oil penetrates affects its comedogenicity. A thick and greasy oil is difficult for the skin to absorb and has a more pronounced occlusive character.

Note : Applying a product containing a comedogenic oil does not systematically lead to the appearance of comedones. Various factors can influence skin reactions such as its overall composition, the oil concentration in the product, as well as the individual's skin type.