Ingredient Spotlight: What Is Allantoin + Skin Benefits & Best Products

Like snail mucin and lotus extract, allantoin is a popular ingredient in the world of Korean Beauty, though it may not be discussed as often. This star ingredient is so notable because of its ability to soothe the skin of just about anyone, regardless of skin type or sensitivity. 

Over the years allantoin has made its way into skin care ingredient lists everywhere, beyond its original popularity in K-beauty. Here, your full guide to allantoin including benefits, cautions, and the best products. Let's dive in. 

We know allantoin is a popular ingredient, but what exactly is allantoin? Board-certified dermatologist and YouTube creator Andrea Suarez, M.D., explains: "Allantoin is an extract that comes from the comfrey plant but also can be found in a variety of other plants," which includes beets and chamomile.

The ingredient is similar in functionality to panthenol (vitamin B5), as it can soothe redness and irritation. For this reason, Suarez explains, allantoin is frequently found in cosmetics marketed for irritated skin and after-sun products. 

However, allantoin is a multifunctional ingredient with a hefty list of benefits. Here, a list of some of the most notable uses of allantoin for the skin. 

Allantoin has several key benefits in skin care:

Whether irritation has come from over-exfoliation that led to a compromised skin barrier or an allergic reaction, allantoin is a great ingredient to soothe red, reactive skin. Clean cosmetic chemist Krupa Koestline tells mbg that allantoin is an effective anti-irritant that works by, "protecting the skin and alleviating the irritation potential of harsh surfactants, oils, and acidic or alkaline materials." 

One particular case that may call for topical allantoin: dermatitis. Suarez explains, "There are some studies showing some improvement in dermatitis that is caused by radiation treatment when using an emulsion of natural oils and allantoin." However, research on the topic is still limited. 

What we do know is that, in general, allantoin doesn't further irritate the skin and can have soothing effects. So next time your skin is feeling reactive and angry, this is one ingredient you can deem safe to use until your barrier is repaired. 

Allantoin is often found as an ingredient mixed into products of all kinds, from hydrating face creams to chemical exfoliant treatments. Koestline explains that "[Allantoin] enhances the efficacy and appeal of formulas by acting as a skin protectant and providing necessary moisture." 

So if you see allantoin listed on your exfoliating products, it's likely to balance out the drying effects of the other ingredients (which is a good thing). 

Board-certified dermatologist Christina Lee Chung, M.D., FAAD, tells mbg that "allantoin is thought to have keratolytic properties and...it is derived from urea, which, like the ubiquitous alpha-hydroxy acids, can help smooth and soften skin by getting rid of excess dead skin." 

While retinoic acid (found in retinol and retinoids) and chemical exfoliants speed up cell turnover, they can be irritating for those with sensitive, reactive, irritated, or injured skin. Allantoin serves as a safe, gentler way to accelerate natural cell turnover. 

The Journal of the American Academy of Dermatology1 (JAAD)1 investigated the efficacy of using allantoin to aid in wound healing. In this study2, allantoin proved effective at aiding wound healing and reducing the formation of scars. 

This is why allantoin has been marketed as a scar treatment in many formulas. 

Allantoin can be found in products commonly labeled "eczema safe" because of its ability to soothe the skin, combat itch, and reduce inflammation. For those with psoriasis, allantoin may be a safe option as well. 

In this study, allantoin shampoo was shown to reduce inflammation and aid in wound healing for those struggling with psoriasis on the scalp. However, it's important for those with severe eczema and psoriasis to consult their dermatologist before using topical products. 

Allantoin is a generally safe and effective ingredient, which is why it's so popular in products formulated specifically for sensitive skin. Koestline notes that up to 2% allantoin is safe, even for those with sensitive skin. 

Chung notes that allantoin is a safe ingredient for those prone to breakouts as well. "Because it is thought to have keratolytic properties, allantoin can be used safely and may improve acne-prone skin." 

Allergy can still occur regardless, so it's best to spot-test any product before adding it to your routine if this is a concern. 

Allantoin is found in skin care products of all kinds, including those formulated for sensitive and irritated skin. This ingredient has countless benefits including soothing skin, aiding in wound healing, preventing the formation of scars, reducing inflammation, and even increasing cell turnover. There are few cautions to using allantoin in skin care. If you're looking to get a handle on reactive, irritated skin, check out this guide to determine if you have hypersensitive skin and how to tend to it.