What does panthenol do for skin? What the trials show

Turn over almost any cream sold for “sensitive” or “stressed” skin and panthenol is somewhere in the first half of the ingredient list. It sits there so reliably that it reads like filler. It isn’t. Panthenol has been in skincare for about 70 years, and it has more controlled human data behind it than many of the ingredients printed larger on the front of the box. So what does panthenol do for skin, and how much of the “soothing” language does that research actually cover?

What does panthenol do for skin?

Panthenol holds water in the outer layer of skin and, in small controlled trials, helped that layer lose less water and recover faster after irritation. It is listed on labels as panthenol (provitamin B5), and studies usually call it dexpanthenol.

A review in the American Journal of Clinical Dermatology describes dexpanthenol as the stable alcohol form of pantothenic acid (vitamin B5). Pantothenic acid is a component of coenzyme A, which takes part in the metabolism of fatty acids, proteins and sterols. A 2002 trial paper adds why that matters for the skin surface: coenzyme A catalyzes early steps in making fatty acids and sphingolipids, which are central to the lipid layers of the stratum corneum (the outer layer of skin). The same review describes topical dexpanthenol as acting like a moisturizer, improving hydration, reducing transepidermal water loss (the water that evaporates through skin) and keeping skin soft and elastic.

The cleanest test of that moisturizing effect is a randomized, double-blind, placebo-controlled study from 2000. Dexpanthenol was put into two different oil-rich bases and compared with the bases alone. After seven days, the dexpanthenol formulas improved stratum corneum hydration and reduced water loss, and both differences from the plain base were statistically significant.

The Cosmetic Ingredient Review expert panel, which assesses cosmetic ingredient safety in the US, lists panthenol’s reported functions as a hair conditioning agent, a skin-conditioning agent (humectant) and a solvent. Humectant is the key word here. Like glycerin or sodium hyaluronate (a form of hyaluronic acid), panthenol attracts water, which is why it behaves best under something that keeps that water in. Our guide to whether hyaluronic acid dries out skin explains that humectant-and-seal logic in more detail.

Is panthenol good for sensitive skin?

For most people, yes, and that reputation comes from studies on deliberately irritated skin. It is not a universal yes: a small and growing number of people are allergic to it.

The best-known study irritated volunteers’ skin with sodium lauryl sulfate (SLS), a harsh cleansing agent used in labs to damage the skin barrier on purpose. A dexpanthenol cream or the same cream without dexpanthenol was then applied twice a day. Barrier repair was significantly faster with the dexpanthenol cream than with the plain base or with no treatment. Hydration rose with both creams, but more with dexpanthenol. Both reduced roughness, and only the dexpanthenol cream reduced visible redness.

A second study tested protection rather than recovery. Twenty-five healthy volunteers applied either a hand balm with 5% dexpanthenol or a placebo to their forearms twice daily for 26 days, and from day 15 to day 22 the same areas were also exposed to 2% SLS twice a day. Twenty-one finished. Only one measurement, skin hydration, showed a statistically significant difference: it dropped at the placebo sites after the SLS challenge. When the researchers compared each person’s two arms, the dexpanthenol side looked better in 11 people and the placebo side in one.

The other half of the answer is allergy. A 2025 review of panthenol contact allergy notes that positive patch-test reactions, while still uncommon, have risen from 0.2-0.7% to 1.2% in recent years. The authors point out that panthenol is common in products marketed as gentle or hypoallergenic, and suggest that people who keep reacting after switching to such products may be worth patch testing for it. Our explainer on what hypoallergenic means on skincare labels covers why that label promises less than it sounds like.

Why is panthenol in so many soothing products?

Because its research record suits the claim, and because it is easy to formulate with. Read past the label, though, and the strongest studies tested specific creams, not panthenol on its own in any product.

The 2002 review says dexpanthenol penetrates skin well and reaches high local concentrations when it is delivered in a suitable vehicle, such as a water-in-oil emulsion. That detail is easy to lose. The 2000 trial used oil-rich bases, and the SLS trials used creams and a hand balm. A watery toner with panthenol near the end of its ingredient list is a different product, even if the marketing borrows the same vocabulary.

It also helps to know who wrote the most-cited overview. The 2017 review of dexpanthenol’s first 70 years was co-written by a dermatologist and three authors from Bayer Consumer Care, and it opens with the first dexpanthenol formulation, Bepanthen Ointment. That does not make the data wrong. It does mean the evidence base is narrower than the number of products using the word “soothing” suggests. The same review is candid that the exact mechanism has not been fully worked out, though newer work suggests dexpanthenol increases the mobility of molecules in the outer skin layer that matter for barrier function.

Panthenol vs niacinamide: what’s the difference?

They are both B vitamins, but they are studied for different jobs. Panthenol is mostly studied as a moisturizer and for helping skin recover from irritation. Niacinamide (vitamin B3) is studied for how it changes the skin’s own barrier lipids.

In a 2000 study on cultured human skin cells, niacinamide raised ceramide production 4.1 to 5.5 times over six days, along with other barrier lipids. Applied to skin, it increased ceramide and free fatty acid levels in the stratum corneum and lowered water loss in dry skin. That is a slower, structural kind of support. Panthenol’s trials, by contrast, measure what happens over days on skin that has just been stressed. We go into ceramides themselves in do ceramides repair skin barrier damage.

So the choice is less “which is better” and more “what is your skin doing right now.” If your face feels tight and hot after over-exfoliating, panthenol’s evidence fits that moment. If you are building a long-term routine for skin that is dry most of the year, niacinamide’s evidence is closer to that goal. Many formulas include both, which is not a problem as long as your skin tolerates each one.

Editor’s note

I learned the value of a plain recovery product the hard way. I once layered several melanin-care (brightening) products on top of each other, and my skin answered with dry patches and a rough texture. What I lean on when my skin is irritated, sunburned or broken out is the lotion I got from my dermatologist, Intrinsic Lotion MD, because it goes on comfortably even then. On my body, including my shoulders and chest, I use haruharu wonder’s Black Bamboo Top-to-Toe SPF Veil, whose ingredient list includes panthenol. It finishes moist without leaving my skin shiny.

Why is panthenol in sunscreen?

In sunscreen, panthenol is there for comfort, not protection. The UV filters do the protecting; panthenol is one of the moisturizing ingredients that shape how the layer feels, which matters because a sunscreen that feels good is one you will put on your body as well as your face.

Body skin needs it as much as your face does. Shoulders and the décolleté (the upper chest and neck) catch direct sun whenever you wear a tank top or an open neckline, and sunburn there counts the same as sunburn anywhere else. A meta-analysis of 51 study populations found that melanoma risk rose with the number of sunburns in every period of life, childhood through adulthood, not only in childhood.

Two analyses of the same randomized trial in Nambour, Australia, show what regular use changes. Adults assigned to daily sunscreen use showed no detectable increase in skin aging after 4.5 years, and their skin aging was 24% less than in the group that used sunscreen at their own discretion. In the trial’s melanoma follow-up, where the daily group applied sunscreen to the head and arms, 11 new melanomas had been found ten years after the trial ended, against 22 in the discretionary group. For a full-body routine, our guide to how much sunscreen to use on your face explains how dose affects protection.

How do you use panthenol in a routine?

Use it the way you would use any humectant: on clean skin, under a cream or lotion that seals water in. Most people meet it in moisturizers, toners and mists rather than as a standalone serum, so you rarely need to add a dedicated panthenol step.

A few practical points follow from the studies above:

• If you want the effect seen in the trials, look for panthenol in a cream or lotion rather than relying on a rinse-off product.
• If a product labeled gentle still leaves you itchy or red, panthenol is one of the ingredients worth checking for.
• Patch test any new product on a small area first, especially if you react easily.

Where it sits in your routine follows the usual layering logic, covered in what order to put on skincare: watery panthenol toners and mists early, panthenol creams near the end.

This article is for general cosmetic information and is not medical advice. If you have a skin condition, speak with a dermatologist.