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What Is Skin pH? How to Tell if Yours Is Healthy, and Why It Matters
Beauty

What Is Skin pH? How to Tell if Yours Is Healthy, and Why It Matters

11 January 2025


What Is Skin pH? How to Tell if Yours Is Healthy, and Why It Matters




Many products claim to balance the pH of your skin. Here’s a primer on what they do and whether they’re worth the hype.



If you’ve spent any time browsing skin-care products in the past few years, whether online or in the store, you’ve likely seen a lot of claims about how a wide variety of these products can help your skin’s pH balance.




From dermatologists’ offices to the aisles of Sephora, the market is now filled with pH-focused products: cleansers, toners, moisturizers, pH strips, and even high-tech wearable pH sensors.



But what exactly is pH — and why does its “balance” matter to you and your skin?




While aestheticians, dermatologists, and wellness gurus often have divergent points of view on the skin pH buzz, all seem to agree that pH levels are important to overall skin health. But beyond that, it can be hard to navigate the many different claims about pH-based skin-care products and separate fact from fantasy.



Here’s a closer look at the science, the competing claims, and some guidance on if and when pH skin products might be right for you. Your skin will thank you.




What Is pH, Anyway? A Quick Science Lesson for Beginners



For some pH skin basics, let’s go back to high school science class for a moment. The pH is a numeric scale that indicates how acidic or alkaline something is. On the pH scale of 1 to 14, 7 is neutral, below 7 is acidic, and above 7 is alkaline. What does that have to do with your skin?




“The pH of your skin is normal at 4.7,” says Anthony Youn, MD, a plastic surgeon based in Troy, Michigan. “The thought is that if you alter that pH, you’re altering how healthy the skin is.”



Beauty insiders also talk about how pH can affect what’s called the “acid mantle,” a thin barrier on the surface of your skin that helps maintain a slight pH skin acidity. Dr. Youn explains that if you disturb your acid mantle by using overly harsh products, you’re going to suffer the consequences, and they won’t be pretty.




While it has recently re-entered the lexicon, the term “acid mantle” actually dates to 1928, when it was coined during one of the earliest studies on skin surface pH, according to a review article.



The Rise of pH in Skin-Care Products




“Your acid mantle is made up of amino and lactic acids, plus sebum, also known as fatty free acids,” says Tiffany Masterson, the founder of the Houston-based skin-care line Drunk Elephant, which ensures its products are pH balanced. Self-trained on the subject of skin pH, Masterson has become a leading voice on the topic largely through the success of her brand.



“The acid mantle just so happens to protect skin from environmental factors that lead to aging and all-around irritation,” she says. The brand’s Slaai Makeup-Melting Butter Cleanser has been popular with beauty insiders for its pH-balancing powers.




Other products, like TULA Life’s Pro-Glycolic 10% Resurfacing Toner, were so popular when they launched that they were frequently sold out.



The skin pH awareness has even gone high-tech: La Roche-Posay (part of the L’Oréal Groupe) launched My Skin Track, a wearable sensor that detects trace amounts of sweat from your pores and promises an accurate skin pH reading in just 15 minutes. (The product won an innovation award when it debuted at the 2019 Consumer Electronics Show.)




Some credit the rise of pH-focused skin care in the West to the success of South Korean skin-care worldwide. “Many people living in Korea identify with a sensitive skin type, and some of the redness and irritation is attributed to the high pollution levels in Korea,” says Charlotte Cho, a cofounder of the K-Beauty website Soko Glam. “As a result, Korean beauty brands often formulate products with low pH.”



Bestselling K-Beauty brands like Corsx and Acwell often list the pH of each product on the labels.




But some medical experts question the extent to which this focus on pH-balanced products matters to the average consumer. “The reason why we don’t put too much thought into it is because the skin-care scientists have already done that,” says New York City–based dermatologist Cheryl Karcher, MD. “They’re very smart people, these PhDs making these skin-care products. They know that you have to have something close to the pH of the skin or else it’s not going to be cosmetically appealing — it’s going to burn.”



The skin’s barrier is slightly acidic for a reason: to keep moisture in and bacteria out, Dr. Karcher says. “If your pH balance is off and it’s too alkaline, your skin is going to look flaky and red. If it’s too acidic, you’ll increase your chances of inflammatory skin conditions like eczema and acne.”




Masterson believes that common ingredients in products cause many of our skin troubles. Those ingredients include fragrances, essential oils, drying alcohols, and harsh cleansing agents such as sodium lauryl sulfate, which can cause inflammation and disrupt the acid mantle.



“No product can make a difference in the health of your skin barrier if you’re using another product that is actively causing it harm,” says Masterson. “Your body doesn’t work that way. You can’t smoke a cigarette and then eat some broccoli and hope they cancel each other out. So why would your skin be any different? This is why we are adamant about both the importance of pH balanced formulas as well as avoiding the categories of ingredients that can cause the acid mantle harm.”




Why pH-Balancing Products Might Matter Less if You Have Healthy Skin



As much as the skin’s pH balance and acid mantle matter, there is no one-size-fits-all solution. Much depends on the natural state of your skin. Karcher explains that healthy skin is about more than pH alone. “pH is the flavor of the month, but it has to be part of a bigger picture,” she says. “Yes, you need to have an acidic pH to have healthy skin, but if your skin is healthy and you use an alkaline cleanser, your skin is going to revert back in just a few minutes.”




Karcher believes that pH is one of many components that keep skin healthy, but it’s not the only one, nor is it necessarily the primary one. “There are so many factors that contribute to overall healthy skin that if you focus just on pH you’re going to miss so many others that are just as important, or, in fact, more important than pH,” she says.



Cho agrees, but notes that by keeping your skin pH at an ideal level with the right products, you may get ahead of some common complaints. “The pH of your cleansers matters because something that is high pH, 9 and above, can be too drying and stripping for your skin,” says Cho. “When your acid mantle and skin barrier are compromised, it can lead to bacteria, which causes acne and dehydration, which leads to wrinkles. And when the pH of your skin is normal, it should look smooth and hydrated.”




How a Growing Understanding of Gut Bacteria Has Fueled Interest in Skin pH Imbalance



A plastic surgeon specializing in holistic beauty, Youn believes that one reason pH balance has become so trendy in skin care may be the growing research about the microbiome, which protects us against germs, breaks down food to release energy, and may affect the skin.




“There’s something now called the gut-skin axis, where we’re finding that the health of the gut also impacts the trillions of bacteria that live on our skin, and when your pH is imbalanced, it may affect that,” says Youn, citing a research review.



Youn says that while many in the holistic beauty world have become obsessed with pH, the acid mantle, and the microbiome, it’s not the case in the medical world just yet. “The real question is just how much impact does the pH of a skin-care product have on the skin, and for how long? I don’t think we know,” he says. “If you ask 10 plastic surgeons who are recommending skin-care products about the pH of the skin and the acid mantle, they probably would have no idea what you’re talking about.”




Sometimes research follows marketing, Youn adds. “It remains to be seen what role pH balance plays in disturbing the microbiome, but if it affects bacteria on the skin, that might explain the origins of inflammatory disease skin problems like eczema, rosacea, and acne — which have no known cause in science as of now.”

Trevor Cates, ND, a Park City, Utah–based naturopath who has addressed the American Academy of Antiaging Medicine about the skin’s barrier function, says the foods we eat can play a part. “Eating a lot of sugar or dairy products can increase sebum production,” says Cates. “Those things can impact the acid mantle from the inside-out. But also, what we put on the skin can impact that. And the first thing that people do is use a cleanser, so it’s important that it has a mild acidity.”

The Best Way to Find Out if Your Skin-Care Products Have a Low pH

It may be that you don’t need to worry too much about the pH of your products if you have healthy skin. But if you already suffer from inflammatory skin conditions, such as acne or eczema, you’ll want to stick to cleansers, serums, and moisturizers that range from 4.6 to 5.5 to avoid stripping the skin, says Cates.

Because many skin-care products in the United States don’t list the formula’s pH on the label, you can find out what the pH of a product is by checking the brand’s website, or call the company and ask. If you want to be sure, you can also purchase pH strips and test a product yourself. “If you live in a location where the tap water is hard, that can cause your skin’s pH balance to become more alkaline,” Cates says. (If you see white spots on your glassware, or calcification on your showerheads, you likely have hard tap water, according to Sciencing.) One solution is to try cleansing with micellar water, which French women have been hailing as the secret to great skin for decades, per an article in Vogue.

On the nutrition front, one review cited research that suggested diet may have a bigger connection to skin health than many dermatologists have believed to date. On the basis of existing data, a plant-based diet that’s low in refined carbohydrates is a good idea for overall skin health, the review’s authors concluded.

And when all else fails, sometimes it’s best to remember that less is more.

“There’s something I call the ‘hospital phenomenon,’” says Masterson. “When I was delivering my babies, I was in the hospital for several days each time and then at home in bed recovering. I really didn’t pay much attention to my skin then, and guess what? My skin was never happier. It’s because I allowed it to function on its own and left the acid mantle alone to do its job, which it did very well. If you struggle with skin issues and you don’t know what else to do, the answer is almost always: ‘Do less.’”

DQH Knowledge drop: In your 20s, your skin cell turnover decreases. (Cell turnover is a key component in keeping your skin youthful.) You know what else slows down? Your collagen production. Starting in your 20s, collagen decreases by about 1 percent per year. Should you want to prevent fine lines and wrinkles, start by eliminating behaviors that contribute to premature aging. “If it’s bad for you, it’s bad for your skin,” says dermatologist Michel Somenek. “Cigarette smoking reduces blood flow to the skin and causes premature wrinkling and a dull skin texture. Making the repeated pursed motion to inhale can also cause smoker’s lines. Alcohol and recreational drugs are toxins for the skin that damage its cellular structure and DNA,” Somenek tells us. “The faster you eliminate vices while you are young, the better chance your skin and body have to recuperate.” Also, adopting an anti-aging routine in your 20s is key. After all, the best offense is a good defense. We spoke to Somenek and experts Joshua Ross and Audrey Kunin to find out more. Keep reading for the best anti-aging products for your 20s, according to skincare professionals. Sunscreen “We all know that the sun is the number one cause of skin aging and starting the prevention in your 20s is very important,” Ross says. “The majority of your sun damage won’t start to appear until you’re in your 30s, so don’t wait until you see it surface or you’ll be behind the curve. Stay ahead of it with a good-quality zinc-based sunscreen worn daily.” Farmacy Green Defense Daily Mineral Sunscreen An invisible sunscreen with SPF 30, plus botanical extracts meant to protect skin with tons of antioxidants. Bonus: It’s clean and fine to use under makeup. Bareminerals Complexion Rescue™ Tinted Moisturizer Broad Spectrum SPF 30 Although we recommend you use your SPF and moisturizer separately, we also understand moments when you don’t have time or energy for that extra step. For those times, this bareMinerals moisturizer is a great thing to have on hand. Vitamin C Serum “A great introduction to anti-aging is to start with a vitamin C serum in your morning skincare routine,” Ross says. “It’s a powerful antioxidant that will neutralize free radicals and brighten the skin.” He adds that it’s a great way to counteract the effects of the sun’s harmful rays, which, as previously mentioned, are among the biggest causes of premature aging. Drunk Elephant C-Firma™ Vitamin C Day Serum The Drunk Elephant C-Firma is a lightweight serum that promises to give skin a glow by combining the brightening powers of vitamin C with ferulic acid, l-ascorbic acid, and vitamin E. The included sodium hyaluronate is meant to replace hydration loss, so you shouldn’t have to deal with any irritation. Sunday Riley C.E.O. Rapid Flash Brightening Serum This potent serum is jam-packed with vitamin C (15 percent, to be exact), which means it’s a potential superstar at both brightening skin and dousing it in antioxidants. Peptides Using peptides on your skin has many benefits, says Somenek. “The skin barrier is what defends the body against pollution, UV rays, bacteria, and toxins. It can be damaged by several everyday factors. Using topical peptides aids in building a stronger barrier,” he says. “Peptides comprise elastic fibers, which are a type of protein. These fibers help to make skin appear taut and firm. Peptides can also help repair damaged skin, relieve inflammation, and even out skin tone. Some peptides can kill acne-causing bacteria that is common in 20-somethings.” Kunin agrees, saying, “Peptides are an excellent entry point for supporting collagen.” She recommends looking for face and eye treatments that contain these collagen-boosting powerhouses. Charlotte Tilbury Magic Eye Rescue Cream This Charlotte Tilbury super-emollient eye cream has a base of coconut oil and shea butter (read: it’s incredibly hydrating). Botanicals plus peptides are meant to help reduce dark circles and boost collagen, respectively. This creamy moisturizer serves up potent collagen-boosting peptides and pycnogenol, and antioxidant-rich vitamin C. “Instead of sitting on top of the skin, peptides penetrate the outer layer so they go deep. The ‘signals’ they send tell the cells to produce elastin and collagen, which are needed for youthful-looking skin,” explains Somenek. At-Home Peel Pads Remember that skin cell turnover fiasco we talked about earlier? One way to help support it is by exfoliating. “Exfoliation is important to help keep skin fresh and luminous,” Kunin says. She recommends using at-home peel pads as an easy and effective way to exfoliate. “The goal in your 20s is to fight the slowing pace of cell turnover. It is wise to use products that gently exfoliate, yet still remove oil and other impurities. Products that have Alpha Hydroxy Acids (AHA) or Beta Hydroxy Acids (BHA) are a good choice.” According to Somenek, you should only exfoliate two to three times a week. “People of all ages are guilty of over-exfoliating and that can be too much of a good thing,” he says. Dermadoctor Kakadu C Intensive Vitamin C Peel Pad A few swipes of this Derma Doctor powerful peel pad promise to leave your skin glowing and smooth, thanks to the seven (yes, seven) types of chemical exfoliants, including AHA and BHA. It also contains vitamin C via Kakadu plum extract for added brightening and antioxidant protection. KEY INGREDIENTS Kakadu plum extract is sourced from the Kakadu plum, a fruit grown in northern Australia. It contains vitamin C, which restores the skin’s natural barrier, increases collagen production, and soothes irritation. Dr. Dennis Gross Skincare Alpha Beta® Universal Daily Peel Pads These are the gold standard of peel pads, with a cult following and over 900 five-star reviews on Sephora. They’re easy to use and contain a blend of anti-aging exfoliating acids. Emollient Night Cream “In your 20s, you need to start upping the hydration in your skincare routine. You may have been cautious of over-moisturizing because of acne in your teens, but as you enter your 20s, your skin transitions and becomes drier,” Ross says. “I recommend an emollient night cream added into your evening skincare regimen.” “Twenty-somethings need to make sure that they are not using creams that will clog their pores and cause excess oil production,” says Somenek. Opt for non-comedogenic products. Cerave Skin Renewing Night Cream One great choice is the CeraVe Skin Renewing Night Cream, which is a non-comedogenic night cream that leaves skin soft and glowy. It combines the moisturizing powers of ceramides and hyaluronic acid. RoC Retinol Correxion Max Hydration Creme “The best night cream ingredients contain retinol, benzoyl peroxide, and/or salicylic acid or hyaluronic acid. The goal is to moisturize, yet remove excess oil,” says Somenek. This Roc Retinol Correxion cream fits the bill as it contains both hyaluronic acid and retinol so it promises to moisturize while also being non-comedogenic.
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