8 Oily Skin Myths That Make Shine Worse

The oily skin myths that do the most damage are the ones that tell you to strip oil away: skip moisturizer, wash three times a day, wipe on an alcohol toner. Dermatologists advise the opposite, because irritated skin can make more oil. Other myths are half true: oily skin may wrinkle a little less, and drinking water hasn't been shown to reduce oil.

Below are eight common myths, each with a verdict and a short note on the evidence. This is a myth check, so for the full morning and evening plan, see our oily skin routine.

Which oily skin myths are true and which are false?

Most are false, two are partly true, and the pattern is the same: anything that dries or scrubs skin hard tends to backfire.

Myth 1: Does oily skin need moisturizer?

Verdict: yes, it does. The American Academy of Dermatology (AAD) tells people with oily skin to apply moisturizer after cleansing, because it's still important to keep skin hydrated. Oil and water are different things: sebum sits on the surface, while hydration is the water held in the outer layer of skin. Skin can be shiny and still short on water, which is the situation we cover in oily but dehydrated skin.

Evidence note: the AAD suggests a moisturizer that also contains broad-spectrum SPF 30 or higher to save a step in the morning, and products labeled oil-free and noncomedogenic. A light gel or lotion usually feels best on oily skin.

Myth 2: Should you wash oily skin more often?

Verdict: no, twice a day is enough. The AAD advises people with oily skin to cleanse up to twice daily and after sweating, and its general face-washing advice is to limit washing to twice a day and after sweating, using lukewarm water, fingertips and a gentle cleanser without alcohol.

Evidence note: a randomized trial in men with mild to moderate acne had participants wash once, twice or four times a day for six weeks. The twice-daily group improved on blackheads and non-inflamed spots, while the once-daily group got worse; four times a day brought no extra benefit, and the authors noted overwashing may be less harmful than once assumed. So a third or fourth wash won't hurt everyone, but it doesn't help either, and scrubbing during any of them irritates skin.

Myth 3: Do alcohol toners and astringents control oil?

Verdict: they make shine disappear for a moment and can make things worse later. The AAD warns that a face wash that is too harsh can irritate skin and trigger increased oil production, and advises against oil-based or alcohol-based cleansers for the same reason. Its face-washing guide also recommends a cleanser that does not contain alcohol.

Evidence note: Cleveland Clinic points out that toners used to be mostly harsh astringents that could easily irritate the skin, while soothing toners are now the norm. If you like the step, a gentle, alcohol-free toner is the safer choice, and a strong tingle after applying is a sign to stop.

Myth 4: Does oily skin age slower?

Verdict: partly true. The AAD notes that people with oily skin tend to have thicker skin and fewer wrinkles. A Japanese study of skin from 58 donated bodies, aged from their 20s to 90s, found that forehead wrinkles were shallower where sebaceous gland density was higher, and that skin with more glands tended to have a thicker dermis and less sun damage.

Evidence note: the same study found no such link for crow's feet, where there are few oil glands, and it showed a correlation rather than proof that oil prevents wrinkles. Sun exposure remains the bigger driver of visible aging, and the AAD still recommends sunscreen for oily skin because it helps prevent sun damage that can lead to wrinkles and age spots. Oily skin gets a small head start and still needs daily SPF.

Myth 5: Does drinking water reduce oily skin?

Verdict: not supported by evidence. A systematic review of studies on fluid intake and skin found the evidence weak in quantity and quality. Extra water was linked with a slight increase in skin hydration, mostly in people who drank little to begin with, but the link between water intake and sebum was unclear.

Evidence note: drinking enough water is good for you, and some health sites suggest it calms oil glands. The research to date doesn't show that drinking more changes how oily your face is. If you want to test it on yourself, log water intake next to how shiny you are by noon for a few weeks.

Myth 6: Does oily skin always mean acne?

Verdict: false. In a study of 46 women with acne and 46 without, the acne group made more facial oil on average, but there was no correlation between how much sebum someone produced and their lesion count in most facial areas. The authors concluded that higher sebum doesn't directly cause acne lesions.

Evidence note: acne also needs clogged follicles, bacteria and inflammation. Plenty of people are oily and rarely break out, and some dry-skinned people do. We go through the difference in acne-prone vs oily skin.

Myth 7: Does greasy food make your skin oily?

Verdict: little evidence. A family physician interviewed by Cleveland Clinic said that people often blame greasy food for oily skin, but there isn't much proof, and that the oil on fries is entirely different from the oil on your nose.

Evidence note: the same article suggests that a low-glycemic diet may help by keeping sugar and insulin levels down, which could lower sebum. That idea is plausible but less settled than the skincare advice above. Genetics plays a bigger part: oily skin tends to run in families, along with age, climate and stress.

Myth 8: Can oily skin skip sunscreen?

Verdict: false. The AAD recommends that people with oily skin wear sunscreen outdoors and choose a moisturizer with broad-spectrum SPF 30 or higher. For breakout-prone skin, it suggests sunscreens with zinc oxide and titanium dioxide and without fragrance or oils.

Evidence note: a heavy sunscreen can feel greasy, which is why people skip it. Gel, fluid and matte textures fix most of that. Our guide to the best sunscreens for oily skin compares them by ingredient.

What actually helps oily skin?

Gentle habits and a few well-tested ingredients beat stripping. In short:

• Blot, don't rub. The AAD suggests pressing blotting paper on for a few seconds, since rubbing spreads oil around.
• Try niacinamide. In a placebo-controlled trial in 100 Japanese adults, a 2% niacinamide moisturizer lowered sebum excretion after 2 and 4 weeks; in a split-face study of 30 white adults, it reduced surface oil after 6 weeks. More in our niacinamide guide.
• Use acids carefully. The AAD says salicylic, glycolic and lactic acid can help reduce oiliness but may be too harsh for some people; stop or cut back if your skin gets irritated.
• Pick matte makeup. Oil-free, water-based formulas labeled "matte" help, and never sleep in makeup.
• Get help if it's extreme. If oil comes with stubborn blackheads or acne, the AAD suggests seeing a board-certified dermatologist.

How can a selfie scan or ingredient scanner help?

Myths are easier to drop once you can see what a change actually does. Pori scores a selfie from 0 to 100 in about 10 seconds, with a breakdown that includes Pores & Texture and Hydration & Moisture, so you can check whether adding a light moisturizer or cutting a third wash changes anything over a few weeks. Its skin diary logs sleep, water, stress and diet next to each scan, which is a simple way to test the water myth on yourself. The ingredient scanner (part of Pro) reads a barcode or a label photo and flags each ingredient as beneficial, use with caution or avoid for your skin type, which helps you spot a high-alcohol toner before you buy it.

An app isn't a diagnosis. If oiliness changes suddenly, comes with painful breakouts or with flaking and redness around the nose and brows, see a dermatologist.