Panthenol appears on more ingredient lists than almost any other skincare ingredient, and it is rarely the one on the front of the pack. It is provitamin B5. Skin converts it to pantothenic acid, which cells use when they make the fats that hold the barrier together.
What it does
It holds water. Panthenol is a humectant, and a small enough molecule to get into the upper layers of skin and work there.
It calms. In studies where skin was deliberately irritated with a harsh detergent, panthenol reduced the redness and roughness that followed.
It helps the barrier recover. Research on dexpanthenol, the active form, shows damaged skin losing less water and repairing sooner with it than without. This is why it has been used in wound-care ointments for decades. Those ointments use it at a higher strength than a face cream does, so the cosmetic effect is a milder version of the same thing.
The names on a label
Panthenol, D-panthenol and dexpanthenol are the common ones. DL-panthenol is a mixture in which only half converts to the vitamin, though all of it holds water. Provitamin B5 is the same ingredient described for the front of the box. Pantothenic acid is the vitamin itself, and it turns up occasionally.
Leave-on and rinse-off
Panthenol does most of its work in products that stay on the skin: serums, creams and lotions. That is where it has time to be absorbed and converted.
In a cleanser it is on the face for under a minute and most of it goes down the drain. It still makes the wash itself less drying, which is a fair reason to include it. It should not be counted as a dose of the vitamin.
Who gets the most from it
Dry and irritated skin benefits first. So does skin recovering from too much exfoliation, as described in over-exfoliated skin, and skin that reacts easily, which the sensitive skin post covers.
It is also useful next to a retinoid or an exfoliating acid, where it offsets some of the dryness those cause.
Oily skin can use it freely. It adds water and no oil.
What it does not do
It has no effect on pigment or on oil production, and it is not an anti-ageing active. Its job is to keep skin comfortable enough to tolerate the ingredients that do those things.
What it pairs with
Everything. Panthenol is stable, has no pH requirement and reacts with nothing else in a routine. It sits alongside niacinamide, vitamin C, acids, retinoids and ceramides without any change to the order.
Side effects
It is one of the best-tolerated ingredients in use. Allergic reactions to panthenol have been reported and are rare. A patch test is still sensible with any new product, since the reaction may be to something else in it.
Panthenol, glycerin and hyaluronic acid
All three are humectants, and they overlap more than brands admit. Glycerin is the strongest water binder of the three and the cheapest. Hyaluronic acid forms a light film at the surface. Panthenol is the mildest humectant of the three and adds the soothing effect the other two lack.
A formula that uses two or three of them together is normal practice. Layering a separate serum for each one adds steps without adding much.
Where it sits in the Cham range
Panthenol is on the ingredient list of four of the five Cham products: the Brightening Face Wash, the Brightening Face and Body Serum, the Brightening Body Lotion and the Brightening Face Mask. The face cream does not list it.
In each it plays a supporting part beside glycerin, and by the reasoning above the serum, lotion and mask are where it counts most. Cham makes no standalone panthenol product, and the skin barrier repair guide explains where humectants like this one fit among the other barrier ingredients.
