Is Your Skin Quietly Intolerant to Vitamin C? Here’s How to Tell
Main image – Leandrocrespistudio/Stocksy
About five years ago, vitamin C was the star ingredient on pretty much everyone’s bathroom shelf. Proven to brighten dark spots, add a glow, reduce redness, firm up the skin and keep it hydrated (among other benefits) if you didn’t apply vitamin C, did you even have a skincare regime?
Recently though, my TikTok feeds seems to be full of users complaining that vitamin C and their skin just aren’t getting along, mainly due to irritation and breakouts. (And actually, when you think about it, is it really that surprising that an ingredient with radiance benefits can risk causing a breakout?)
“I’ve actually seen more patients coming in confused or frustrated after reacting to vitamin C serums,” says chief medical officer at DermOnDemand, Dr Hannah Kopelman. So what does an intolerance to vitamin C look like? How do you handle it? And what can you use instead?
Here, we ask the experts to break down the signs to look out for that prove it’s not you, it’s your vitamin C. And, most importantly, how to avoid an intolerance in the first place.
What is a vitamin C intolerance?
“It usually means your skin is reacting negatively to topical forms of vitamin C,” explains Dr Kopelman. “This doesn’t mean your body can’t tolerate dietary vitamin C—this is purely a skin sensitivity. It can show up as stinging, burning, redness, flaking, or even breakouts after using vitamin C-containing products.”
So who is likely to get an intolerance? Well, Vitamin C doesn’t often discriminate and everyone’s at risk, but more so if you already have a skin condition.
Image – Annatabakova/Stocksy
“Anyone can develop a sensitivity to vitamin C, but I most often see it in people with compromised skin barriers—think sensitive, rosacea-prone, or acne-inflamed skin,” explains Dr Kopelman.
She also says to look out for what you’re using it with. “People using strong actives like retinoids or exfoliating acids are also more likely to become reactive when layering vitamin C,” she explains.
“The most common culprit is L-ascorbic acid, which is the purest and most potent form of vitamin C—but also the most acidic and unstable. Products with a high percentage (10–20%) of L-ascorbic acid or those combined with other low-pH ingredients (like AHAs) can be too much for reactive skin types.”
Board certified dermatologist Dr David Johnson adds, “numerous patients of mine have reacted to “brightening” serums with high levels of actives. Too much of a good thing is sometimes just that.”
How common is a vitamin C intolerance?
“Quite typical,” says Dr Johnson. “You can see it in my workplace all the time. Not because vitamin C is unhealthy, but because it’s potent stuff, and some skin cannot tolerate it.”
More specifically, “around 10 to 15 for every 100 individuals,” he explains. “I notice it quite commonly in those that use numerous products simultaneously or do not allow the skin to acclimatize.”
So some users find vitamin C ok, others have come across problems with it, and here at Live That Glow we’ve written about this kind of split of opinion before. Take the Ole Henriksen Banana Bright Eye Cream, for example, which contains vitamin C.
It had a reformulation in 2022, after which many users worryingly complained of burning, puffiness, irritation and inflammation. While others – including myself – experienced no such thing, perhaps proving that a reaction to vitamin C depends on your skin’s type and general resilience.
“People generally have a good tolerance to vitamin C, but once again it all comes down to individuals’ genetic make-up,” says royal facialist, Deborah Mitchell.
How do you know if you have an intolerance to vitamin C?
Dr Johnson says it’ll be obvious straight away. “Your skin will burn or sting shortly after you use it,” he warns. “You’ll experience redness, bumps, or peeling. It tends to appear on the nose, chin, or the cheeks. If it burns when it’s not supposed to, it’s an indicator.”
Mitchell adds, “harsher signs include skin peeling off, violent reactions and pigmentation appearing.”
Image – Artempodrez/Stocksy
And Dr Kopelman warns, “for some people, it can also trigger acne-like bumps or worsen existing inflammation. If your skin feels uncomfortable within minutes of application and this persists with repeated use, you might be intolerant.”
How do you handle it?
The key is to never ignore it. “Your skin is trying to tell you something”, Dr Kopelman says. “I always recommend doing a patch test with any new product, especially if it contains actives like vitamin C. If you’ve already reacted, take a break and let your skin recover. You might be able to reintroduce it later at a lower concentration or in a gentler form.”
Dr Johnson adds, “try a small bit on your arm or jaw first. Wait a day. If your skin stays calm, you’re good to go.”
However, if your skin doesn’t react well to vitamin C, you’ll want to be cautious as it can be disguised in other names. Dr Johnson says to be aware of the following:
- L-ascorbic acid
- Ascorbyl palmitate
- Magnesium ascorbyl phosphate
- Sodium ascorbyl phosphate
- Ascorbyl glucoside
- Tetrahexyldecyl ascorbate
“The derivatives like sodium ascorbyl phosphate or tetrahexyldecyl ascorbate tend to be more stable and gentler, so some people who can’t tolerate L-ascorbic acid can still use those,” adds Dr Kopelman.
And if you’re wondering if an intolerance to vitamin C can ever go away, Dr Kopelman has good news. “Yes, especially if the issue was due to a damaged skin barrier,” she explains.
“Once the skin is repaired—by simplifying your routine, avoiding over-exfoliation, and moisturizing properly—you might be able to tolerate a gentler form of vitamin C or a lower percentage. It’s all about slowly reintroducing and not overwhelming the skin.”
What can you use instead?
So, you’re intolerant to vitamin C but the problems you used it for in the first place are still there. Here are the best substitute ingredients for:
- For tackling hyperpigmentation: “Niacinamide, azelaic acid, kojic acid, tranexamic acid—these are all great options that can brighten skin without the irritation that some vitamin C products cause,” says Dr Kopelman. Or, “red light therapy,” adds Dr Johnson. “At RedliteX, it’s what we use to calm pigment cells without risk.”
- For adding radiance: “Polyhydroxy acids (PHAs), lactic acid, or fermented ingredients can gently exfoliate and enhance radiance without over-stripping the skin,” explains Dr Kopelman. And, “red light therapy increases the energy of your skin cells and blood flow, giving you that glow without burning you,” Dr Johnson says.
- For antioxidant protection: “Ferulic acid, resveratrol, green tea extract, and CoQ10 are all powerful antioxidants that can neutralize free radicals and calm inflammation,” Dr Kopelman says.
- For anti-ageing: “Bakuchiol (a soothing retinol), peptides, and retinaldehyde,” says Dr Johnson. “All red light therapy is my preferred method, it induces skin to produce collagen naturally.”
The takeaway
There seems to be a divide between those whose skin reacts negatively to vitamin C and whose doesn’t. But whatever your skin type, you should always start using an ingredient cautiously by first doing a patch test and/or gradually introducing it into your skincare regime.
According to the experts, you’ll know immediately whether you have an intolerance to vitamin C or not – it will start to burn and sting so you should stop using it. Look for those sneaky key words on the label of your products that are vitamin C in disguise and avoid using them if your skin doesn’t agree with it.
The good news is that a vitamin C intolerance doesn’t have to last forever (unless you have an allergy to it) and to treat things like dull skin or hyperpigmentation, there are plenty of alternative ingredients on the market that will do just as good a job. Just make sure you take your time and don’t overload your skin with too many new ingredients all at the same time.
Meet the experts
Dr Hannah Kopelman is Chief Medical Officer at DermOnDemand.
Dr. David Johnson is board-certified dermatologist and Co-Founder of RedliteX.
Deborah Mitchell is an A-list and Royal beautician. Founder of Heaven Skincare and famed for her bee venom products, Deborah has been trailblazing the beauty industry for over 30 years.
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