What is one major factor in determining skin type?

The level of oil production is a primary factor in determining skin type because it directly influences the skin's texture, appearance, and overall condition. Skin types can typically be classified as oily, dry, combination, or normal, each of which is characterized by different levels of oil (sebum) production.

For example, oily skin is marked by excessive oil production, which can lead to a shiny appearance and an increased likelihood of acne. Dry skin, on the other hand, has lower oil production, resulting in a lack of moisture and a rough feel. Understanding the level of oil production helps skin care professionals to recommend appropriate products and treatments tailored to the individual's skin type, thereby promoting better skin health and appearance.

While factors like skin color, sun exposure, and age can also influence skin conditions and treatment approaches, they are not as directly indicative of the skin type itself as the level of oil production is.