Lip oil vs lip balm: which is better for dry, chapped lips?
A balm. A 2019 trial found a highly occlusive oil and wax formula smoothed rough lips with no active care agent. Liquid oil seals far less. When a lip oil is fine.
For dry, chapped lips, use a lip balm. A balm puts down a solid film that slows the water leaving your lips, and that seal is what the evidence links to smoother lips. In a 2019 trial, 20 women used lip samples for four weeks. One sample was made to be highly occlusive, from ordinary oil and wax with no special care ingredient. It gave a significant improvement in how rough lips looked, compared with a low-occlusion sample. A liquid oil seals less: in the studies that tested liquid oils, they slowed water loss only part of the way, while the semi-solid petrolatum sealed best. Keep a lip oil for shine and a soft feel on lips that are not chapped.
Chapped lips need a seal, and a balm is the better seal. Lips lose almost three times as much water as cheek skin, and hold about a third of the moisture. A highly occlusive oil and wax formula improved lip roughness and surface moisture over four weeks, with no active ingredient doing the work. Liquid oils give what one study calls "semi-occlusion". A lip oil is fine for gloss and comfort when your lips are already in good shape.
- Lips lose water almost three times as fast as cheek skin and hold about a third of the surface moisture. A film that slows that loss is called occlusive.
- A lip balm is oil held in a solid, usually wax or petrolatum. A lip oil is the liquid without the solid.
- Studies that tested both forms found the semi-solid sealed better than the liquid oil.
- In the one lip trial that tested occlusion on its own, the highly occlusive oil and wax sample was the one that made rough lips look smoother.
- Use a balm on chapped lips, day and night. Use a lip oil for shine when your lips are not chapped.
What a lip balm and a lip oil actually are
A lip balm is a stick or a tin of oils set firm by a solid. The solid is usually a wax, such as beeswax or candelilla, or petrolatum, which is itself mineral oil held in a semi-solid network. The wax forms a mesh of tiny crystals that traps the liquid oil, so the product holds its shape. How that mesh forms is explained in oleogels and wax networks, and the firmness at each wax level is in lip balm ratios.
A lip oil is the liquid on its own. It is usually a blend of plant oils, such as castor oil or jojoba oil, sometimes with esters or mineral oil. Flavour or colour is often added. It has no crystal mesh, so it stays wet and runny on the lip.
Three more terms carry the argument.
- Chapped lips are lips that are dry, rough, flaking or split. Doctors use the word cheilitis for inflamed lips. This page is about ordinary chapping.
- Transepidermal water loss, shortened to TEWL, is the water that evaporates out through the surface of skin or lips. It is measured in grams per square metre per hour. Higher means faster drying. It is explained in transepidermal water loss.
- Occlusive describes a film that slows that water loss by sitting on the surface like a lid. How it differs from an emollient or a humectant is set out in occlusive, emollient and humectant.
Lip balm and lip oil, side by side
The first page of results for this question is brand and lifestyle copy. Most of it says to use both, and none of it gives a figure. The table below gathers the figures that do exist.
| Property | Lip balm | Lip oil |
|---|---|---|
| Physical form | Oil held in a solid: wax or petrolatum | Liquid oil, no solid network |
| Occlusion, as tested on skin | Petrolatum: "the most effective occlusion" (Patzelt) | Paraffin oil and most plant oils: "semi-occlusion" (Patzelt) |
| Swapped into the same cream at equal weight | 20% petrolatum or more: below the occlusion line from 30 minutes (Wang) | 50% mineral oil, no petrolatum: "close to the value of the bare skin" (Wang) |
| Measured cut in water loss | 77.5 to 93.0% under a 0.1 mm petrolatum film, four people (Berube) | No measured figure in these sources |
| Tested on dry, rough lips | Highly occlusive oil and wax sample improved roughness and moisture over 4 weeks (Tamura) | Not tested |
| US "lip protectant" claim | Possible with a listed active at its level, such as petrolatum at 30% or more | Possible only with a listed active, such as mineral oil at 50% or more; plant oils are not listed |
| Best use | Chapped, flaking or split lips | Shine and comfort on lips that are not chapped |
Every occlusion row points the same way. No source here found a liquid oil sealing as well as a semi-solid. The lip trial did not test a lip oil. What it shows is that the seal itself helped, and the seal is where a liquid oil is weakest.
A worked case: two labels, read side by side
The quickest test is the label on what you already own. Take two ingredient lists like these, built for this page rather than copied from real products.
- Product A, sold as a lip oil: Ricinus communis (castor) seed oil, simmondsia chinensis (jojoba) seed oil, squalane, prunus amygdalus dulcis (sweet almond) oil, tocopherol, aroma.
- Product B, sold as a lip balm: Petrolatum, ricinus communis seed oil, cera alba (beeswax), butyrospermum parkii (shea) butter, tocopherol, aroma.
Suppose your lips are chapped in winter and you are choosing between the two. Work through three questions.
First, is there a solid in the list? Look for a wax (cera alba, candelilla, carnauba, ozokerite, microcrystalline wax) or petrolatum. Product A has none. Every item is a liquid oil, vitamin E or flavour. Product B has two: petrolatum and beeswax. A is the liquid form the oil studies placed at "semi-occlusion". B is the semi-solid form that sealed best.
Second, where does the solid sit? Ingredients are listed in descending order of weight down to 1 percent, as reading a balm label explains. Petrolatum is first in B, so it is the largest single ingredient. Beeswax is third. So B is a petrolatum balm firmed with wax.
Third, does it carry a US lip protectant claim? A product sold in the US as helping relieve chapped lips is an over-the-counter drug. Its active ingredient has to be on the list in 21 CFR 347.10, at the level given there. Petrolatum counts from 30 percent. Only a drug label naming petrolatum as the active would confirm B's level. Product A cannot carry the claim at all. Castor, jojoba, squalane and almond oil are not on the list.
So for chapped lips, use B. A is not harmful. It is a pleasant, glossy product that seals less.
One label changes the picture slightly. If a lip oil lists paraffinum liquidum, which is mineral oil, first, it may contain enough for a US claim, since mineral oil counts from 50 percent. The oil studies still place liquid mineral oil with the plant oils, not with petrolatum. A legal claim and a strong seal are not the same thing.
Why lips need a seal more than other skin
Lips are not ordinary skin. In 2004, Kobayashi and Tagami at Tohoku University measured the lips and cheeks of 303 healthy Japanese women aged 21 to 80, in winter.
Their main result: "TEWL was significantly almost three times as high on the lips as that on the cheek". The cheek itself is "a site that shows far higher levels than do other body areas".
The lips also hold less water at the surface. The study measured high-frequency conductance, an electrical reading of how wet the surface layer is. On the lips it was "significantly lower" than on the cheek, with mean values "about one-third of those on the cheek".
The authors' explanation is structural. The surface cells of the lip were "parakeratotic", meaning they still held their nuclei, and were larger than cheek cells. They concluded that "the incomplete corneocyte formation of the lip surface is responsible for the poor barrier function and water-holding capacity". Corneocytes are the flattened dead cells of the outer skin layer. On the lip they never fully form.
A surface that loses water fast and holds little of it is the one that gains most from a film that slows the loss. The same study gives a second clue. In seven men taking oral etretinate, a drug known to cause dry, scaly lips, water loss rose significantly on both lip and cheek. A drug that dries the lips also raised their water loss. The wider picture on lip care ingredients is in ingredients for chapped lips.
The trial that tested occlusion on its own
Most lip care studies test a special ingredient, which leaves open whether the ingredient or the film did the work. A 2019 study from Japan tested exactly that. Tamura, Yasumori and Yamamoto published it in the International Journal of Cosmetic Science (volume 42, 2020, pages 46 to 52). The full paper is paywalled, so everything here comes from the published abstract.
The stratum corneum is the outermost layer of skin, and the authors note that lips have a lower water content there than the cheek. Their aim was to test a "highly occlusive formulation consisting of a combination of common oil and wax, not by a specific care agent".
The method:
- Twenty Japanese women with normal skin, aged 20 to 39, mean age 28.1.
- A four week continuous use test, with one sample of low occlusivity and one of high occlusivity.
- Lip roughness and wrinkles scored by eye, plus a "hollow index" measured from 3D images taken with an ANTERA camera.
- Capacitance and TEWL measured on the lips. Capacitance is an electrical reading of how much water the surface layer holds.
The results come in two parts. Within the group using it, the highly occlusive sample "showed significant improvement in the appearance roughness score, wrinkle score, the hollow index and capacitance of the SC". The capacitance gain, "which is most correlated with lip roughness", was found "after 2 and 4 weeks". When the two samples were compared head to head, "a significant improvement effect in rough appearance was seen in subjects using the highly occlusive formulation".
So the head to head difference the abstract reports is in rough appearance. The moisture gains are reported for the highly occlusive sample over time. The abstract does not say whether capacitance also differed significantly between the two samples, so this page does not claim it did.
The authors' conclusion is direct: "a highly occlusive formulation is effective in improving the roughness of the lips, and this effect is due to the difference in the occlusive property not by a specific care agent."
The product that worked had no star ingredient. It was oil and wax, built to seal, which is a description of a lip balm. The abstract does not describe the low occlusion sample, and the trial did not test a retail lip oil. What it shows is that the seal is the working part, so the question becomes which format seals better.
Why a liquid oil seals less than a balm
No study we found measured a lip oil against a lip balm on lips. Three studies on skin come close, and they agree.
The liquid oil test. In 1988, Wang and colleagues at Bristol-Myers and the University of Cincinnati were designing a steroid cream. They built creams in which the oil phase was held at 50 percent, and swapped liquid mineral oil for semi-solid petrolatum ten points at a time. They measured water loss from volunteers' arms for 90 minutes.
Bare skin lost a mean of 7.7 grams per square metre per hour. The authors counted anything under 5.6 as occlusive. The cream with 50 percent mineral oil and no petrolatum gave water loss "close to the value of the bare skin", which the authors describe as "little occlusivity". Every cream with 20 percent petrolatum or more fell below 5.6 from 30 minutes after it went on.
Their summary: "petrolatum provides higher occlusivity to vehicles than does mineral oil." These were creams with water in them, not lip products. They still isolate the one change that matters here: the same weight of oil, liquid or held in a semi-solid. The full study is set out on mineral oil against petroleum jelly.
The plant oil test. Patzelt and colleagues at the Charité in Berlin applied four plant oils and paraffin oil, another name for mineral oil, to six healthy volunteers. Petrolatum was the benchmark. They found that "the application of the vegetable oils (except jojoba oil) as well as paraffin oil, led to a similar occlusion of the skin surface. The most effective occlusion was found for petrolatum." The authors call what the oils achieved "a semi-occlusion of the skin surface". Jojoba stood apart, and the abstract does not say in which direction.
Lip oils are mostly the kind of liquid these two studies tested. Oils do slow water loss, but only partway.
The film test. Berube, Messinger and Berdick, at Chesebrough-Pond's in 1971, put films of white petrolatum of known thickness on forearms. A film 0.1 mm thick cut water loss by 77.5 to 93.0 percent in four people. The seal grew as the film got thicker.
The same paper heads off a wrong reading of the other two. It tested six petrolatums with 52.8 to 74.6 percent oil, and the oilier ones needed a thinner film for the same seal. So the oil inside petroleum jelly is not the weak part. What the liquid oil studies lacked was the semi-solid holding it. None of the three papers explains why that form matters, so this page does not offer a mechanism.
A wax balm is not petrolatum, and none of these studies tested beeswax. The bridge between them is the lip trial, where the formula that worked was oil and wax. Petrolatum and wax balms are compared directly in natural balm against petroleum jelly, and the material itself is covered in petrolatum and mineral oil.
What the US rules call a lip balm
Under 21 CFR 347.3, a "lip protectant drug product" is "a drug product that temporarily prevents dryness and helps relieve chapping of the exposed surfaces of the lips; traditionally called 'lip balm.'"
A product that makes that claim is an over-the-counter drug. Its active ingredient must be one of those listed in 21 CFR 347.10, "within the concentration specified for each ingredient". The ones that matter for lip products are:
| Active ingredient | Permitted level | Usual form in a lip product |
|---|---|---|
| Petrolatum or white petrolatum | 30 to 100% | Semi-solid, balm base |
| Cocoa butter | 50 to 100% | Solid fat, balm base |
| Lanolin | 12.5 to 50% | Soft, sticky semi-solid |
| Mineral oil | 50 to 100% | Liquid |
| Dimethicone | 1 to 30% | Silicone fluid |
A labelled lip protectant may then say it "temporarily protects" and "helps relieve" "chapped or cracked lips". It may add that it helps "protect from the drying effects of wind and cold weather".
No common lip oil carrier is on the list: castor, jojoba, almond, sunflower and squalane are all absent. So a plant oil lip oil cannot be sold in the US as relieving chapped lips. But the rule judges ingredients, not formats. Beeswax is not on the list either, so a wax and plant oil balm cannot carry the claim unless it also holds a listed active at its level. A mineral oil lip oil at 50 percent or more could carry it, even though the studies above put liquid mineral oil at only partial occlusion.
The regulation governs what a label may say, not which product seals better. For makers, where the line between a cosmetic and a drug falls is set out in cosmetic against drug claims. These rules are US only.
Where a lip oil is the better choice
None of this makes lip oil a bad product. Lip oils are sold for shine and a soft, cushioned feel. A liquid film lies smooth and wet looking on the lip, which is the look a gloss is after. A balm sets to a firmer, less glossy film. A wax-free gloss of that kind, built on castor oil, is the lip gloss balm formula, and the choice of carrier is weighed in fractionated coconut oil against jojoba.
A lip oil also slows water loss, just less than a balm. Patzelt's "semi-occlusion" is a real effect, and on healthy lips it may be all you need.
Two kinds of lip oil need more care. Plumping lip oils work by irritating the lip on purpose, with ingredients such as menthol or capsicum. On lips that are already split, that sting is the wrong direction, as lip plumping balm explains. And any lip product, oil or balm, can carry flavour or fragrance that some people react to. The documented cases are covered in does lip balm dry your lips.
Why "use both" keeps coming up
The advice to use both persists for reasons that have little to do with lips. The first is that most pages giving it sell both products.
The second is that feel gets mistaken for function. A lip oil feels moist straight away, and a balm can feel waxier, so the moist one seems the moisturising one. The water loss studies say the opposite: the firmer film is the stronger seal.
The third is that "use both" is never wrong enough to fail. It just adds a step and a cost the evidence does not ask for. No study we found tested the two layered together, so there is no evidence that an oil under a balm does more than the balm alone.
On chapped lips, the balm is doing the work. On healthy lips, the oil is a matter of taste. If you buy one product for winter, buy the balm.
Choosing by the state of your lips
| Your lips | Use | Why |
|---|---|---|
| Chapped, rough or flaking | Lip balm | The highly occlusive oil and wax sample improved rough appearance over a low-occlusion one (Tamura) |
| Split or cracked | A balm, ideally petrolatum based | Petrolatum gave "the most effective occlusion" (Patzelt) and cut water loss 77.5 to 93.0% at 0.1 mm (Berube) |
| Dry overnight | A thicker layer of balm or petroleum jelly | The seal grew with film thickness (Berube) |
| Healthy, and you want shine | Lip oil | No seal problem to solve; oils still give "semi-occlusion" (Patzelt) |
| Already using a lip oil and still chapped | Switch to a balm | In the same cream, liquid oil left water loss close to bare skin, and the semi-solid did not (Wang) |
| Buying for a US chapped lips claim | A product labelled as a lip protectant | Only listed actives at listed levels may carry the claim (21 CFR 347.10) |
How much balm to put on is worked through in how much balm to apply. For a heavier night product, the overnight lip mask gives two thick, low-wax formulas. To make your own day balm, start with how to make lip balm. Choose between a tube and a tin with lip balm tube or tin.
If your lips are chapped, use a balm for one week and leave the lip oil in the drawer. Apply it before you go out in cold or wind, and again at night. If they still split or sting after a week, the problem may not be dryness. See the section below.
What this answer does not cover
This page answers one question: for ordinary chapped lips, which format seals better. Lips that are sore for another reason need a different answer.
Some lips stay cracked, bleed, crust, blister or swell, or split at the corners of the mouth. These can be signs of cheilitis with a cause such as infection, allergy or sun damage. A lip that reacts to a balm, an oil or another product may have allergic contact cheilitis, and a change of balm will not fix it if the balm is the cause. Drugs that dry the skin, including the retinoid in the Kobayashi study, can keep lips dry whatever you put on them. Any of these is a reason to see a doctor or pharmacist. Sun is a separate job too: neither a plain balm nor a plain oil blocks ultraviolet light, which is covered in lip balm with SPF.
On the evidence, the limits are these. The lip trial had 20 women with normal skin, aged 20 to 39, in Japan. It compared two samples, not a retail balm and a retail lip oil. We have its abstract only, without doses or effect sizes. The water loss studies were done on forearm skin, not lips, and two of them on creams with water in them. None tested beeswax, and none put a lip oil and a lip balm on the same lips. What they agree on is the direction: semi-solid films sealed better than liquid oils, and sealing helped rough lips. They do not support a single number for how much better a balm is than a lip oil, so this page does not give one.
Frequently asked questions
Is lip oil or lip balm better for chapped lips?
Lip balm. Chapped lips are losing water too fast, and a balm puts down a firmer seal. In a 2019 trial, a highly occlusive oil and wax formula with no special care ingredient improved rough appearance over a low-occlusion sample in four weeks. Studies on skin found liquid oils give only "semi-occlusion", while semi-solid petrolatum seals best.
Is lip oil just lip balm without the wax?
Close to it. Both are mostly oils. A balm adds a solid, usually beeswax or another wax, or petrolatum, which sets the oil into a stick or a soft solid. A lip oil leaves that out, so it stays liquid. The solid is what makes the difference to how well it seals.
Does lip oil moisturise lips?
It slows water loss a little, which is what moisturising oils do. Studies that tested plant oils and paraffin oil on skin called the effect "semi-occlusion" and found petrolatum far more effective. On healthy lips that may be enough. On chapped lips a balm does more.
Why do my lips get chapped more easily than my skin?
Lips have a weak barrier. In a study of 303 women, water loss from the lips was almost three times that of the cheek, and the cheek is already high. Surface moisture on the lips was about a third of the cheek. The surface cells of the lip never fully form, so lips dry out fast.
Can I use lip oil and lip balm together?
You can, and it will not harm most lips. No study has tested the two layered, so there is no evidence it does more than a balm alone. If your lips are chapped and you want one product, choose the balm. Keep the oil for shine on days your lips feel fine.
Can a lip oil say it relieves chapped lips?
In the US, only if it holds an approved active at the approved level. Under 21 CFR 347.10, mineral oil counts from 50 percent and petrolatum from 30 percent. Plant oils such as castor, jojoba and almond are not on the list, so a plant oil lip oil cannot make that claim there.
Sources and further reading
- Tamura E, Yasumori H and Yamamoto T, The efficacy of a highly occlusive formulation for dry lips, International Journal of Cosmetic Science 42(1): 46-52, 2020 (online 2019). Abstract read via OpenAlex.
- Kobayashi H and Tagami H, Functional properties of the surface of the vermilion border of the lips are distinct from those of the facial skin, British Journal of Dermatology 150(3): 563-567, 2004.
- Wang JCT, Winarna SR, Lichtin JL and Patel BG, Effect of phase-volume ratio of o/w emulsion vehicles on the activity of a topically applied vasoconstrictor, Journal of the Society of Cosmetic Chemists 39(2): 139-157, 1988.
- Patzelt A, Lademann J, Richter H and colleagues, In vivo investigations on the penetration of various oils and their influence on the skin barrier, Skin Research and Technology 18(3): 364-369, 2012.
- Berube GR, Messinger M and Berdick M, Measurement in vivo of transepidermal moisture loss, Journal of the Society of Cosmetic Chemists 22(6): 361-368, 1971. Tables III and IV.
- US Food and Drug Administration, 21 CFR Part 347, Skin protectant drug products for over-the-counter human use, sections 347.3, 347.10 and 347.50, eCFR, read November 2026.
Reviewed and updated 1 November 2026. Spotted an error? Tell us and we will fix and log it.