Oily skin comes down to one thing: your sebaceous glands are producing more sebum than you need. The good news is that several proven strategies, from over-the-counter topical ingredients to prescription options, can meaningfully dial back that production. The approach that works best depends on what’s driving your oil in the first place.
Why Your Skin Overproduces Oil
Sebum production is primarily controlled by androgens, hormones that bind to receptors concentrated in the sebaceous glands. These glands are especially dense on the face and scalp, which is why those areas tend to be the oiliest. An enzyme called 5-alpha-reductase, found abundantly in facial sebaceous glands, converts testosterone into a more potent form that ramps up both cell growth and lipid production within the gland.
This is why oiliness typically surges during puberty, when androgen levels spike. But hormonal fluctuations throughout adulthood, stress hormones, and even genetics continue to influence how much sebum your glands pump out. Stress triggers a chain reaction in the skin that ultimately increases local cortisol production, which can worsen oiliness. Understanding these triggers helps explain why some strategies work better than others: the most effective ones either block androgens at the gland, shrink the glands themselves, or reduce the amount of oil that reaches the skin’s surface.
Topical Ingredients That Work
Salicylic Acid
Salicylic acid is one of the most accessible and well-studied options for oily skin. Unlike water-soluble exfoliants such as glycolic acid, salicylic acid is lipid-soluble, meaning it can dissolve into the oily environment of your pores and sebaceous glands. Once inside, it breaks down the lipids that clog follicles and directly decreases sebum secretion. Studies comparing it with other peeling agents have found salicylic acid has a stronger effect on surface oil levels. Look for leave-on products (cleansers, toners, or serums) with concentrations between 0.5% and 2% for daily use.
Niacinamide
Niacinamide (vitamin B3) at just 2% concentration has been shown to lower sebum output, though the timeline varies. In a clinical trial on Japanese participants, a 2% niacinamide product significantly reduced oil production after just two weeks of daily use, with continued improvement at four weeks. In a separate trial on Caucasian participants, surface oil levels dropped significantly after six weeks. Most over-the-counter niacinamide serums contain 4% to 10%, which is well above the threshold shown to be effective. It’s gentle, pairs well with other actives, and rarely causes irritation.
Green Tea Extract
The main active compound in green tea, EGCG, inhibits the same 5-alpha-reductase enzyme that drives sebum production. In a study on healthy male volunteers, a 3% green tea extract emulsion applied to the cheeks reduced sebum levels over an eight-week period, with statistically significant results. Separate research found that even a 2% tea lotion outperformed zinc sulfate solution for reducing inflammatory acne lesions. Green tea is increasingly available in serums and moisturizers, though concentrations aren’t always listed on product labels. Products that list green tea extract or EGCG as a top ingredient are your best bet.
How Moisturizing Actually Helps
Skipping moisturizer because your skin feels greasy is one of the most common mistakes with oily skin. When the skin’s surface is dehydrated, it can compensate by producing even more oil. The key is choosing the right type of moisturizer.
Humectants are ideal for oily skin. These ingredients, including hyaluronic acid and glycerin, work by drawing water to the skin’s surface from the surrounding environment. They hydrate without adding any oil or creating a heavy film. Occlusives, on the other hand, form a physical barrier on the skin to lock moisture in. Ingredients like petrolatum and mineral oil fall into this category, and they tend to feel greasy and can worsen shine. For oily skin, a lightweight, water-based moisturizer built around humectants provides the hydration your skin needs without contributing to surface oil. Gel-textured formulas are a particularly good fit.
Prescription Options for Persistent Oiliness
Androgen-Blocking Cream
Clascoterone cream 1% is the first topical prescription that works by blocking androgen receptors directly in the skin. In a clinical trial of 40 patients, 12 weeks of twice-daily use reduced sebum levels by 27%, with noticeable results appearing as early as week six (a 22% reduction at that point). Patients also reported a 39% improvement in facial shine and 23% improvement in pore appearance. Because it acts locally rather than systemically, it didn’t produce the tolerability or safety concerns associated with oral hormone-blocking medications, and it can be used by both men and women.
Spironolactone for Women
Spironolactone is an oral medication that blocks androgen activity throughout the body. It’s used off-label for women with hormonally driven oily skin and acne. In a retrospective study of 110 female patients, 85 out of 101 who started on 100 mg per day showed improvement, with 40 achieving completely clear skin at that dose. Those who didn’t fully respond often improved when the dose was increased to 150 or 200 mg daily. Results typically become visible around four months, and dermatologists generally recommend maintaining an effective dose for at least two months before adjusting. Spironolactone is not prescribed to men because blocking androgens systemically causes unwanted hormonal side effects.
Isotretinoin
Isotretinoin is the most powerful option available for reducing sebum. Even at low doses (as little as 2.5 mg taken a few times per week), it has been shown to cut sebum production by up to 64%. At higher doses, reductions reach 90% to 95%, with the sebaceous glands themselves shrinking by 35% to 58%. These are dramatic numbers, and the results often persist long after treatment ends. However, isotretinoin comes with a well-known side effect profile, including severe dryness, required blood monitoring, and strict pregnancy prevention measures. It’s typically reserved for cases where other treatments haven’t worked or where acne is severe.
Daily Habits That Make a Difference
Beyond specific products and prescriptions, a few routine adjustments can help manage oil levels day to day. Washing your face twice daily with a gentle, non-stripping cleanser removes excess sebum without triggering the rebound oil production that harsh cleansers cause. Foaming or gel cleansers tend to work better for oily skin than cream-based ones.
Blotting papers absorb surface oil without disturbing your skincare or makeup. They don’t reduce production, but they’re useful for midday shine control. Clay masks (used once or twice a week) temporarily absorb oil from pores and can reduce the appearance of oiliness for a day or two after use.
Sun protection matters here too. Many people with oily skin avoid sunscreen because it feels heavy, but unprotected UV exposure thickens the outer layer of skin and can worsen clogged pores over time. Lightweight, mattifying sunscreens formulated for oily skin exist specifically for this reason, and many now use silica-based finishes that actively absorb oil throughout the day.
Building a Realistic Routine
For most people, starting with over-the-counter topicals is the practical first step. A simple combination of a salicylic acid cleanser or leave-on treatment, a niacinamide serum, and a lightweight humectant moisturizer covers the three main angles: clearing oil from pores, reducing production at the gland, and keeping the skin properly hydrated so it doesn’t overcompensate. Give this combination at least four to six weeks before evaluating results, since that’s the timeframe most clinical studies use to measure meaningful changes.
If topical products alone aren’t enough, prescription options like clascoterone cream or spironolactone (for women) offer the next level of oil control. These target the hormonal root of the problem rather than just managing what reaches the surface. Isotretinoin remains the most definitive solution, but its side effects make it a last resort for oil control alone. A dermatologist can help determine which prescription approach makes sense based on the severity of your oiliness and whether acne is also a factor.