Best Serum for Oily Skin: A Guide for Men

Oily skin does not need ten products. It needs one serum with the right actives, used the right way. Here is how to pick it, what the research says, and the routine around it.

By Abhishek Jain 01 Oct 202614 min read

Illustration of a young Indian man in a gym changing room, towel over one shoulder, holding a small amber dropper bottle and smiling at his reflection in the mirror

The best serum for oily skin is a light, water-based one built on niacinamide and salicylic acid, with green tea or mandelic acid as a bonus. These actives cut oil output, clear blocked pores and fade the marks pimples leave behind, and the research on them is solid. Use 3 to 5 drops after washing, once or twice a day, under a light moisturizer, and give it 8 weeks.

It is 7 pm at the gym in Koramangala. You have done the workout, had the shower, and now the changing-room mirror is telling the truth. Forehead shining. Nose shining. A fresh pimple on the jaw that was not there at lunch.

So you search "best serum for oily skin" on the walk to the auto. Google hands you 40 bottles, 12 brands, three "no. 1" claims and a video of a man with perfect skin saying "trust me". None of it tells you what to look for.

This does. It covers four things. What makes men's skin oily. Which serum ingredients have real evidence. Which THERŌ serum fits which problem. And the routine around it.

The short answer

Pick a serum with niacinamide and salicylic acid. Green tea and mandelic acid are good extras.
Skip thick, oil-based serums and anything that promises results in 7 days.
Use it after face wash and before moisturizer, 3 to 5 drops, once or twice a day.
Keep the moisturizer. Oily skin that dries out makes more oil.
Give it 8 weeks before you judge it.

Why Is Men's Skin So Oily?

Start with what oil is. Your skin makes a waxy fluid called sebum from small glands next to every hair. A 2017 review in the Journal of Clinical and Aesthetic Dermatology explains why. These glands help build the skin's barrier and defend it. So oil is not the enemy. Too much of it is.

Think of each gland as a tap. Male hormones turn the tap. The same review names the hand on the tap: androgens, in particular one called DHT. They drive the growth of oil glands and how much oil they make. Men make more oil than women, and the review puts that down to higher testosterone.

The tap also responds to weather. Several studies in the review found oil output rises in summer and in humid climates. Mumbai in May, Chennai most of the year, and any city in the monsoon are built for shine. Add a helmet and a two-hour commute, and the mirror at 7 pm is not a surprise.

Then there is the timeline. Oil output jumps at puberty, and in men it does not fall until the 60s or 70s. A 2018 review of 57 studies adds three things. Men's skin is 10 to 20% thicker than women's. It makes more oil and has larger pores. And men's oil output stays steady with age. Nobody grows out of oily skin at 30. You manage it.

Medical illustration of three skin cross-sections side by side showing a clear pore, a whitehead and a blackhead, with the oil gland and hair follicle visible — The oil gland sits beside the hair root and empties into the pore. On the left it drains freely. In the middle and on the right, oil and dead skin have blocked the exit, which is where a pimple starts. (Photo Credit: BruceBlaus, Wikimedia Commons, CC BY 3.0)

Does Oily Skin Need a Serum?

Not every man does. A face wash and a light moisturizer handle mild shine. But if you also have open pores, regular pimples, or dark marks from old ones, you need more. A serum is the step that moves the needle.

Here is why. A face serum is a thin liquid with a high dose of one or two actives. It goes on after face wash and before moisturizer. A face wash is on your skin for 30 seconds. A serum stays on all day or all night, so its actives get time to work. The oil-control research below was done with leave-on products, not rinse-off ones.

Are serums good for oily skin, then? The right ones, yes. Water-based, light, no added oils. The wrong ones, no. A thick oil-based serum on oily skin is a raincoat on a hot day.

Which Serum Is Best for Oily Skin? The Ingredients That Work

Forget brand names and "no. 1" badges. Read the ingredients list. Four actives have real evidence for oily skin.

Niacinamide. A form of vitamin B3. A placebo-controlled trial tested 2% niacinamide on 100 Japanese volunteers. Oil output fell within 2 weeks and stayed lower at 4 weeks. In a 12-week split-face trial on 52 Taiwanese subjects, 4% niacinamide cut pore counts by week 8. Most serums carry it at 5% to 10%. THERŌ's Active Oil Control Niacinamide Serum carries it at 5%. There is a full niacinamide guide for men on Therōpedia.

Salicylic acid. A BHA (beta hydroxy acid) that dissolves in oil. A 2015 review explains that it collects inside the pore and clears blockages. That is why it turns up in so many acne products. The same review found it safe and well tolerated in all skin types, Fitzpatrick I to VI. That covers Indian skin. The American Academy of Dermatology (AAD) puts it first on its list of ingredients for oily skin.

Mandelic acid. An AHA (alpha hydroxy acid) from almonds. A 2024 review of AHAs notes that it has a larger molecule. It enters skin more slowly, so it irritates less than glycolic acid. A 12-week trial compared the two acids as peels on 50 Indian patients with mild to moderate acne. Mandelic acid worked as well as salicylic acid and caused fewer side effects. Those were clinic-strength peels at 45% and 30%. In a serum it is used at a far lower strength, as a gentle daily exfoliant. A serum with salicylic and mandelic acid together covers both jobs. One clears the pore. The other smooths the skin around it.

Green tea. In an 8-week study on 10 men aged 25 to 40, a 3% green tea extract cut oil output on the cheeks. The authors put it down to EGCG, a green tea compound that blocks the enzyme in the oil gland that makes DHT. Ten men is a small study. It is also one of the few oil-control studies done on men, and the result went the right way.

One more that men with oily skin ask about: hyaluronic acid. It is not an oil-control active. It is a water magnet. Cleveland Clinic notes that a quarter teaspoon of it holds about five and a half litres of water. Reactions to it are rare. On oily skin it adds water without adding oil. That is why it shows up as a helper ingredient (sodium hyaluronate) in oil-control serums.

Fresh green tea leaves on the plant in bright sunlight — Green tea on the plant. In the one small study done on men, a 3% extract of these leaves cut cheek oil over 8 weeks. Drinking it does not count. (Photo Credit: Wilerson S Andrade, Wikimedia Commons, CC BY-SA 2.0)

Which Serum Should Men with Oily Skin Pick?

It depends on what bothers you more.

Oil, pimples, pores and the marks they leave: a niacinamide serum made for oily skin. THERŌ's version is powered by niacinamide, green tea and exfoliating acids like salicylic and mandelic acid. It helps control excess oil, refine the look of pores, and reduce the appearance of post-acne marks. In its own 60-day consumer study, 99% of users felt their skin looked clearer. And 100% agreed it felt non-irritating. Those are what users reported, not lab measurements, and it took 60 days.

Oily skin that is also tanned, dull or spotted from the sun: a Vitamin C serum does the brightening job. The oily-skin worry is smaller than it sounds. THERŌ's Intense Bright serum is formulated with 6 brightening actives. They tackle dullness, tanning, dark spots and post-acne marks. In its 60-day consumer study, 99% found it non-greasy. Cannot decide? Vitamin C or niacinamide is a 5-minute read. Vitamin C on oily skin covers the greasy question in full.

Start with one. Two serums on day one is how irritation starts.

THERŌ Active Oil Control Niacinamide Serum in an amber dropper bottle beside green tea leaves, with three close-up panels of men's skin showing excess oil, post-acne marks and open pores — The three problems on the left share one cause, oil. The serum on the right carries niacinamide at 5% with salicylic acid, mandelic acid and green tea, and a 30 ml bottle at 3 to 5 drops a day lasts a couple of months. (Image: THERŌ)

How to Use a Serum on Oily Skin: The Routine

The four-step routine is Cleanse, Treat, Moisturise, Protect. For oily skin it looks like this.

Cleanse. Morning and night, warm water, fingertips. The AAD says to wash up to twice a day and after sweating. Use a gentle foaming face wash, because harsh products push the skin to make more oil. A salicylic acid face wash that is Non-Drying does the job without stripping. THERŌ's 3X Action Face Wash pairs salicylic acid with niacinamide and glycolic acid.
Treat. Put 3 to 5 drops of your serum on your palm and press it over your face and neck until it soaks in. Face, not just the shiny bits. New to acids? Do the AAD's patch test first: a coin-sized spot on the inner arm, twice a day, for 7 to 10 days. Stop if it goes red, itchy or swollen.
Moisturise. Yes, even now. The AAD explains that when skin dries out, the body makes more oil, and that oil clogs pores. Pick a light one that says non-comedogenic or oil-free. THERŌ's oil-control moisturizer is lightweight. It helps control excess oil and unclog pores. Its DustShield™ helps create a barrier against ultra-fine pollution particles like PM2.5. On a Delhi commute in November that is not a small thing.
Protect. Every morning, sunscreen on your face before you leave. The US FDA found that 4 weeks of AHA use raised volunteers' sun sensitivity by 18%. It says to use sunscreen while using one and for a week after. Mandelic acid is an AHA. So sunscreen is not optional with this serum. Skip this step at night.

Morning and night, under three minutes. The whole shelf is three bottles and a sunscreen.

Illustration of a young Indian man in a white T-shirt leaning towards a bathroom mirror at night, pressing one palm against his cheek, an amber dropper bottle on the basin — Flat palm, light pressure, face and neck, done. The serum step takes less time than choosing a playlist. (AI-generated image)

Mistakes Men with Oily Skin Make

Washing five times a day. It feels right. It is wrong. Washing throughout the day is on the AAD's list of habits that worsen acne. More than twice a day irritates skin. Twice, plus once after the gym or a sweaty ride. For the 3 pm shine, the AAD suggests blotting paper pressed on the skin, not another wash.

Skipping moisturizer. Covered above, and worth repeating. Dry skin makes more oil. The men who skip it to "stay matte" end up shinier by lunch.

Buying a serum by brand or by "no. 1" badge. No serum is no. 1 for everyone. Read the ingredients. If niacinamide and salicylic acid are not in the list, it is not an oily-skin serum, whatever the box says.

Stacking actives on day one. A salicylic face wash, two serums, a scrub and a retinol in the same week is a good way to get red, flaky skin that then makes more oil. One serum. Add the next thing only after 4 weeks of calm.

Scrubbing the oil off. The AAD is blunt: scrubbing does not get your face cleaner, it irritates it. Fingertips and a face wash. The besan from your mother's kitchen can stay in the kitchen.

The cream from the chemist that "works in a week". Some over-the-counter creams in India contain a steroid. A 2026 study looked at 96 patients at a government hospital in western Uttar Pradesh. Of them, 64.6% had used one on the face without a prescription. And 25% had used it for acne. Thinning skin showed up in 87.5% of them and acne-like bumps in 63.5%. A week of smooth skin, then months of fixing it.

How Long Before a Serum Makes a Difference?

Weeks, not days. In the Japanese trial, oil output fell within 2 weeks of 2% niacinamide. In the Taiwanese trial, pore counts dropped at week 8. The green tea study ran 8 weeks. The AAD's rule for any new product is to give it 6 to 8 weeks before you judge it.

So: take a photo of your forehead and nose in the same light today. Start the oil-control routine. Look again in 8 weeks, in the same light. Not the gym mirror. That one is lit to sell memberships, not to flatter foreheads.

When Should You See a Dermatologist?

Book a visit, not another search, if:

Pimples are deep, painful, or leaving pits or dark marks that spread.
Oiliness came on suddenly, or with hair loss, weight change or other new symptoms. DermNet notes that heavy oiliness can sometimes point to an underlying condition.
There is a rash, itching, or small bumps that do not act like normal pimples. In humid weather a fungal infection can look like acne and needs a different treatment.
You have been using a steroid or "fairness" cream from the chemist on your face.
You want a prescription retinoid or a clinic peel. DermNet lists topical retinoids for severe oiliness, and they need a doctor.
Nothing has changed after 8 to 12 weeks of a proper routine.

Best Serum for Oily Skin: Common Questions

Does an oily face mean high testosterone?

Not on its own. Men make more oil than women because of testosterone, so oily skin is normal in men. The 2017 review explains that the oil gland converts testosterone into DHT with its own enzyme. So how oily you are depends on how your glands respond, not only on the hormone level in your blood. Two men with the same testosterone can have different foreheads. If oiliness came on suddenly with other symptoms, see a doctor.

Does oily skin age slower?

A little, on the forehead. A 2015 study looked at skin from 58 Japanese cadavers. Forehead wrinkles were shallower where oil glands were denser. There was no such link at the outer corner of the eye, where there are few oil glands. So oil helps the forehead and does nothing for crow's feet. Oily skin still tans, marks and gets sun damage like any other, so sunscreen stays.

Can oily skin use hyaluronic acid?

Yes. Hyaluronic acid holds water, not oil, and Cleveland Clinic notes reactions to it are rare. On oily skin it is useful as a helper inside a light serum or moisturizer. A hyaluronic acid serum on its own will not cut oil, though. For that you need niacinamide or salicylic acid.

What is the best serum for oily skin and open pores?

One with niacinamide and salicylic acid. In the Taiwanese trial, 4% niacinamide lowered pore counts over 8 weeks. Salicylic acid clears the oil that stretches a pore. THERŌ's Active Oil Control serum has both and is built to refine the look of pores. There is a full guide to open pores for men if pores are the main worry.

Which serum is best for oily skin, dermatologist recommended?

Ask any dermatologist and the answer is ingredients, not a brand. The AAD's own oily-skin advice names salicylic acid, glycolic acid and lactic acid. It says to look for oil-free and non-comedogenic on the label. Niacinamide has the trials above. In practice, that is what "dermatologist recommended" means. A dermatologist-tested serum that carries those actives and feels light.

Best Serum for Oily Skin: What Men Can Do Tonight

Your oil glands run on hormones and weather, and neither is taking your feedback. What you control is what sits on your skin for the 23 hours a day you are not washing it.

Tonight, wash with a salicylic acid face wash. Press in 3 to 5 drops of a niacinamide serum. Finish with a light oil-control moisturizer. Tomorrow morning, the same, plus sunscreen. Give it 8 weeks. If you want to start with the two bottles most men buy first, the bestsellers are the place to look.

The gym mirror will still be unkind. You will just have less shine to show it.