How to Find Your Skin Type

The 30-minute home test

There is no single official skin type test. Cleveland Clinic suggests washing and drying your face, waiting 30 minutes, then pressing blotting paper on your T-zone and cheeks (Cleveland Clinic, 2024).

Sebum is the oily substance your sebaceous glands produce. Dry skin is not producing enough sebum. Shine all over after about 30 minutes points to oily skin. Tight, dull or scaly skin points to dry. Comfortable and even points to normal.

The American Academy of Dermatology uses the same five labels: oily, dry, normal, combination and sensitive (AAD). Sensitive skin can go with any of the other types.

What combo skin is

The T-zone is the T-shaped area covering your forehead, nose and chin. Combination skin is dry in some spots and oily in others, often with an oily T-zone (AAD). Combo skin is the same thing in fewer letters.

Korean researchers who measured oil every season proposed a working test: if your T-zone and cheeks read as different types in more than two seasons, you match what most people describe as combination (Youn et al., 2005).

In a Korean study of 709 people with acne, combination was the type people chose most often (Choi et al., 2013). That is a clinic, not a census.

Why self-ratings miss

Your own sense of your skin can be off. In a Korean study of 83 people, 36 with acne and 47 without, researchers measured facial oil with a Sebumeter. People with acne rated their skin oilier than it measured (Kim et al., 2006).

An earlier Korean study measured oil at four sites on each face and reclassified people by the readings. Most had underestimated their oil output. The authors concluded that self-rated skin type does not match measured sebum (Youn et al., 2002).

A later method using sebum-absorbing tape classified 2,173 samples from Chinese women into four types. The authors found good agreement between self-report and the tape (Qin et al., 2020).

Skin type can shift

Korean researchers measured oil at five spots on the same volunteers' faces every season for a year. Summer was the oiliest of the four seasons (Youn et al., 2005).

In the Chinese tape study, sebum levels peaked between ages 20 and 30 and dropped after 40 (Qin et al., 2020). Skin also holds less moisture as you get older (AAD).

Dry skin is common when the air holds little humidity, and winter heating can strip moisture from skin (AAD). Test again when the seasons turn.

Sensitive skin

Sensitive skin is skin that stings, burns, tingles or itches in response to things that should not cause those feelings, as defined in a 2017 position paper (Misery et al., 2017). It is not an oil level. It can sit on oily, dry, combo or normal skin.

A pooled analysis of 26 studies covering 51,783 people found that 71% reported some sensitivity, and 40% said it was very or moderately sensitive. Questionnaire studies may overestimate it (Chen et al., 2020).

Questionnaires, clinics and Fitzpatrick

The Baumann Skin Type Indicator scores four pairs: oily or dry, sensitive or resistant, pigmented or nonpigmented, and wrinkled or unwrinkled. Together those produce 16 possible skin types (Baumann, 2008).

A Polish version was tested in 103 people, who completed it twice, one day apart. Its oily-or-dry section gave highly repeatable results (Brzozowska, 2025). A clinic can go further and measure oil with a Sebumeter.

Doctors sometimes mean something else by "skin type". The Fitzpatrick scale sorts skin into six sun-reactive types, I through VI (Fitzpatrick, 1988). It says nothing about oil.

Oats, beans and pasta

Glycemic index (GI) is a 100-point scale ranking how much a carbohydrate food raises blood sugar compared with glucose. Foods at 55 or below count as low. Dairy, legumes, pasta and fruit are usually low, while most potatoes are high. Breads, breakfast cereals and rice come in high-, medium- and low-GI versions (Atkinson et al., 2021).

A 2022 review found high-GI diets were linked to more acne, "an observation supported by randomized controlled trials" (Meixiong et al., 2022).

In a 2012 Korean trial, 32 people with acne followed a low-glycemic-load or control diet for 10 weeks. Skin samples from the low-glycemic group showed smaller oil glands and less SREBP-1, a protein that drives fat production in oil glands (Kwon et al., 2012).

In a 12-week trial of 43 young men, spots fell by 23.5 on a low-GI diet against 12.0 on a control diet. The diet group also lost more weight, about 2.9 kg (Smith et al., 2007). Both trials ran 10 to 12 weeks. See our oily skin foods and low-glycemic guide.

Sunflower seeds and pecans

Your skin barrier is largely fat. About 50% of the lipids between your outer skin cells are ceramides, and the barrier's scaffold is built from ceramides carrying linoleic acid (Breiden and Sandhoff, 2014). Linoleic acid is an omega-6 fat your body can't make, so it must come from food (Linus Pauling Institute).

The best human evidence is one large survey of 4,025 American women aged 40 to 74, whose skin was examined by dermatologists. Higher linoleic acid intake was linked to lower odds of age-related dryness, with an odds ratio of 0.75 (Cosgrove et al., 2007). That's a link, not a trial.

We found no trial of linoleic-acid-rich foods that measured skin dryness. Essential fatty acid deficiency causes a dry, scaly rash. Rich sources include oil-roasted sunflower seeds (about 9.7 g of linoleic acid per ounce), pine nuts (9.4 g) and oil-roasted pecans (6.4 g) (Linus Pauling Institute).

Kiwi and strawberries

In the same survey of 4,025 US women aged 40 to 74, those who ate more vitamin C had lower odds of age-related dry skin, with an odds ratio of 0.93 (Cosgrove et al., 2007). The first author worked at Unilever.

A 2026 study of 74 healthy Korean adults found vitamin C intake went with better skin hydration, but only in people with one type of gut bacteria (Kim et al., 2026).

Why it might help: in lab studies, vitamin C helps skin cells make barrier fats, which may help skin protect itself from water loss (Pullar et al., 2017). For a fuller hydration plate, see foods for hydrated skin.

Foods that change your type

We found no trial that has tested whether a food moves someone from one skin type to another. PubMed searches for this page in September 2026 returned no randomised food trial with skin type as the outcome.

When the American Academy of Dermatology updated its acne guidelines in 2024, available evidence was insufficient to develop recommendations for dietary changes (AAD, 2024). That is a guideline gap. The small low-GI trials still measured smaller oil glands and fewer lesions. They did not reclassify anyone's type. See the clear skin foods guide for the acne plate.