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Empfindliche Haut

Azelaic Acid for Rosacea and Redness: A Gentle Active Ingredient Under the Microscope

Yves Cannazza
Azelaic Acid Guide: SKINCYCLOPEDIA Ceramide Serum in a Soothing Evening Spa Atmosphere

Redness that just won’t go away, fine broken capillaries on the cheeks and nose, skin that reacts irritably to everything—those affected by these issues usually spend a long time searching for an active ingredient that helps without causing further irritation. One name comes up time and again: azelaic acid. It’s considered one of the gentlest active ingredients based on acids and is frequently recommended, especially for rosacea and skin prone to redness. In this review, we take an honest look at what azelaic acid can do, where the line between cosmetics and medicine lies—and how you can further strengthen sensitive, redness-prone skin in your daily routine.

What is azelaic acid and how does it work?

Azelaic acid is a dicarboxylic acid that occurs naturally in grains such as wheat, rye, and barley—and is even produced by yeasts on our own skin. Unlike traditional exfoliating acids (AHAs, BHAs), it barely exfoliates the skin but works more subtly:

  • Soothing: Azelaic acid can soothe irritated-looking skin and help reduce visible redness.
  • Clarifying: It combats the bacteria associated with blemishes and can help reduce clogged pores.
  • Balancing: It can help even out skin tone in cases of pigmentation spots and post-acne marks.
  • Well-tolerated: Compared to retinol or high-dose fruit acids, it causes irritation significantly less often—hence its reputation as the gentlest of the acids.

It is precisely this combination—soothing and clarifying at the same time—that makes azelaic acid appealing for skin prone to both redness and blemishes.

Azelaic Acid for Rosacea: Where Cosmetics End and Medicine Begins

Honesty is key here: Rosacea is a chronic skin condition—and therefore a matter for the dermatologist’s office, not the cosmetics shelf. The good news: Azelaic acid is indeed one of the active ingredients used in rosacea treatment. As a prescription medication, in concentrations of 15 to 20 percent, and under medical supervision.

Cosmetic products use lower concentrations, usually around 10 percent. They can help improve the skin’s appearance and visually reduce redness—but they are no substitute for medically prescribed therapy. If you suspect you have rosacea (persistent redness, visible broken capillaries, inflammatory papules, burning sensation), have it evaluated by a dermatologist before investing a lot of money in cosmetics. This isn’t just a cliché—it’s the fastest way to skin you’ll feel comfortable with again.

Using azelaic acid: start slowly, be consistent

If you’re trying azelaic acid—whether as a cosmetic serum or a prescription—there are a few basic rules to follow:

  1. Start slowly: Use it every other or every third evening at first, then gradually increase the frequency. A slight tingling sensation during the first few applications is normal and usually goes away.
  2. Apply in the evening: Apply to dry skin after cleansing, followed by a soothing moisturizer. Our guide to the skincare routine explains the correct order.
  3. Use sunscreen during the day: Skin prone to redness is sensitive to UV light—sunscreen is the most important daily step for rosacea anyway. The SKINCYCLOPEDIA SPF 50 Hydrating Fluid provides lightweight protection without a greasy shine.
  4. Avoid combining irritating products: Harsh exfoliants, high-concentration retinol, or alcohol-heavy toners have no place alongside azelaic acid—or on redness-prone skin in general.

Strengthen skin prone to redness: focus on the barrier first

Full disclosure: We currently do not carry a pure azelaic acid serum in the BONSANA lineup. But what we can say from experience is this: When it comes to redness, it’s rarely a single active ingredient that makes the difference—it’s the condition of the skin barrier. If it’s intact, the skin reacts much more calmly to irritants; if it’s compromised, any redness is exacerbated.

Two active ingredients have proven effective here: Ceramides replenish the lipids that a stressed barrier lacks—that’s what the SKINCYCLOPEDIA Ceramide Serum 3% is designed to do. And niacinamide supports the skin’s barrier function while evening out the skin’s appearance—as found in the SKINCYCLOPEDIA Niacinamide 10% Serum with Zinc, which should be introduced gradually to sensitive skin. Especially after summer, when sun and chlorinated water have taken a toll on your skin, focusing on the skin barrier is doubly worthwhile—read more about this in the guide “Skin After Summer Vacation.” And if you’d also like to use soothing masks, you’ll find an overview of which mask types are suitable for sensitive skin in the Face Mask Guide.

SKINCYCLOPEDIA Ceramide Serum 3% – Barriere-Serum für empfindliche, rötungsanfällige Haut

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Gentle Serums for Sensitive Skin

Ceramides, niacinamide, and more for irritated, redness-prone skin—in stock in Switzerland with 24-hour shipping.

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Frequently Asked Questions About Azelaic Acid

Does azelaic acid really help with rosacea?

Azelaic acid is indeed used in the treatment of rosacea—but as a prescription medication in concentrations of 15 to 20 percent, under a doctor’s supervision. Cosmetic products with lower concentrations can help improve the appearance of the skin but are not a substitute for medical treatment.

What percentage of azelaic acid do cosmetic products contain?

Usually around 10 percent. Prescription formulations with 15 to 20 percent are considered medications and should be used under a doctor’s supervision. For the cosmetic care of skin prone to redness, lower concentrations are a sensible, gentle starting point.

Can I combine azelaic acid with niacinamide?

Yes, the two complement each other well: azelaic acid soothes and clarifies, while niacinamide supports the skin barrier. It’s important to introduce both active ingredients one after the other and give the skin time to adjust.

How long does it take for azelaic acid to work?

Patience is key: Expect it to take four to eight weeks of regular use before you see a visible change in your skin’s appearance. For prescription-only products, your dermatologist will specify the timeframe.

What provides immediate relief for acute redness?

In the short term: apply a cool (not icy) compress, use low-irritant, fragrance-free skincare, apply sunscreen—and avoid triggers such as hot beverages, alcohol, or saunas. If the redness persists, a dermatological evaluation is the right step.

For retailers: Do you run a pharmacy, drugstore, perfume shop, or online beauty store in Switzerland? As an official distributor, BONSANA supplies you with SKINCYCLOPEDIA and other curated beauty brands—become a retailer now.

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Polyglutamic Acid: The Moisturizing Ingredient That Beats Hyaluronic Acid?

Everyone knows about hyaluronic acid these days—but the beauty world has long since introduced a second star ingredient for hydration: polyglutamic acid. This fermented active ingredient, often simply called PGA, gained international recognition through the K-Beauty trend and is said to bind water even better than the famous hyaluronic acid—at least that’s the promise. But is that true, and what does it mean for your skincare routine? In this guide, you’ll learn, based on facts, what polyglutamic acid is, how it works on the skin, how it really differs from hyaluronic acid, and how to use it effectively—presented honestly, without any miracle claims. What Is Polyglutamic Acid? A Fermented Moisture-Binding Agent Polyglutamic acid is a biopolymer—a long chain made up of many units of the amino acid glutamic acid. The substance was discovered in nattō, a traditional Japanese dish made from fermented soybeans: the stringy, gel-like substance that forms during fermentation consists largely of PGA. For cosmetic use, polyglutamic acid is now produced biotechnologically through fermentation with microorganisms—a comparatively resource-efficient, vegan manufacturing process. In skincare, PGA is classified as a humectant: an active ingredient that attracts and binds water. Glycerin and hyaluronic acid also belong to this family. This is precisely where polyglutamic acid’s strength lies—and the reason why it is so often compared to hyaluronic acid. This active ingredient has long been established in Korean skincare routines; in Europe, it has only been appearing in serums, essences, and masks for the past few years. Polyglutamic Acid vs. Hyaluronic Acid: An Honest Comparison You often see headlines claiming that polyglutamic acid can bind many times more moisture than hyaluronic acid—frequently citing four to five times the amount. Such figures come from laboratory measurements of water-binding capacity and are plausible as a rough estimate. Nevertheless, the “PGA beats hyaluronic acid” narrative oversimplifies things, as the two active ingredients work differently: Water-binding capacity: Polyglutamic acid can hold more water per gram than hyaluronic acid. In this regard, PGA does indeed come out on top. Site of action: PGA molecules are very large. They do not penetrate the skin but remain on the surface. Hyaluronic acid, on the other hand, comes in various molecular sizes—short-chain variants can penetrate the upper layers of the skin and bind moisture there. Mode of action: Polyglutamic acid forms a film: It creates an ultra-thin, smoothing moisturizing film over the skin that stores water and slows evaporation. Hyaluronic acid, on the other hand, plumps up the upper layers of the skin from the inside out. The honest answer to the question in the title is therefore: Polyglutamic acid outperforms hyaluronic acid in terms of pure water-binding on the surface—but it does not replace it. The two are not an either/or choice, but rather a powerful team: Hyaluronic acid nourishes the upper layers of the skin, while PGA locks in the moisture on top. Many modern formulations therefore deliberately combine both active ingredients. How PGA Works on Your Skin Its film-forming properties are the key to its effectiveness: After application, polyglutamic acid forms an invisible, breathable film on the skin. This film locks in water exactly where dry skin lacks it most—on the surface—while simultaneously reducing moisture loss through the skin, known as transepidermal water loss. Many people notice the results immediately: The skin feels smoother and plumper, looks fresher, and fine dryness lines appear visually reduced. It’s important to be clear: Polyglutamic acid is a cosmetic active ingredient, not a medication. It does not permanently alter the skin’s structure and cannot “iron out” wrinkles or treat skin conditions. Its effect is a skincare benefit—noticeable as long as you use it regularly. That’s exactly what you should expect from a good moisturizer, but nothing more. For skin problems such as eczema or severe, persistent dryness, you should consult a dermatologist. Who Will Benefit Most from This Ingredient In general, every skin type benefits from a well-formed moisture barrier. However, this active ingredient is particularly effective in the following situations: Dehydrated skin: When the skin feels tight, looks dull, and makeup applies unevenly, it’s usually lacking water—not oil. This is exactly where a humectant like PGA comes in. Heated air and winter: Dry indoor air constantly strips moisture from the skin—a recurring issue during the Swiss heating season. The PGA film noticeably slows this loss. Mature skin: Over the years, the skin’s ability to retain moisture decreases. An active ingredient that locks in water on the skin’s surface and visibly reduces fine lines caused by dryness is a valuable addition here. Oily and combination skin: Even shiny skin can be dehydrated. The light, non-greasy texture of a PGA serum hydrates without weighing the skin down. How to Use It: Incorporating PGA into Your Routine PGA is easy to use and is considered very well-tolerated—even for sensitive skin. Here’s how to get the most out of it: Cleanse your face and leave the skin slightly damp—humectants work best when there’s water for them to bind to. Gently massage the PGA serum into your skin before applying richer textures. Finish with a cream that further seals in the bound moisture. The most common mistake: applying the serum to completely dry skin and then not applying anything else. A humectant can only bind what’s already there—and without a finishing cream, some of the moisture will evaporate again. The three steps above are therefore not just a bonus, but the real secret. To find out exactly where a serum fits into the sequence, check out our guide to the correct order of a skincare routine. Polyglutamic acid can be easily combined with most active ingredients: niacinamide is an ideal complement if you also want to refine your skin texture, and it also pairs well with a vitamin C serum in the morning—simply apply the PGA product afterward to lock in moisture. You can use polyglutamic acid daily, both in the morning and at night. Serum and Sheet Mask: PGA by SKINCYCLOPEDIA If you’d like to try this active ingredient, we offer two simple options. The SKINCYCLOPEDIA Polyglutamic Acid Serum 3% features a high concentration of PGA in a lightweight, fast-absorbing formula—ideal as a daily hydrating base under your moisturizer, on its own, or as a complement to your hyaluronic acid serum. For a quick hydration boost in between—such as before an event, after a workout, or after a long day in dry office air—the SKINCYCLOPEDIA Polyglutamic Acid Sheet Mask is designed to do the trick: leave it on for 15 to 20 minutes, gently pat in the remaining essence, and you’re done. Realistic Expectations: What PGA Can—and Can’t—Do To avoid disappointment, here’s the honest assessment: What you can expect: intense hydration on the skin’s surface, a smooth, plump feeling immediately after application, visibly reduced dryness lines, and excellent tolerability—even when combined with other active ingredients. Here’s what you shouldn’t expect: permanently “filled-in” wrinkles, an effect in the deeper layers of the skin, or the treatment of skin conditions. Such promises don’t hold up to honest scrutiny—just as little with PGA as with any other cosmetic active ingredient. Those who understand this can appreciate polyglutamic acid for what it is: one of the most powerful moisture-binding agents modern cosmetics has to offer—and a sensible complement to hyaluronic acid rather than a replacement for it. Shop Now Polyglutamic Acid & Co.: Discover Active Ingredient Serums Tested serums with polyglutamic acid, niacinamide, and vitamin C—shipped from our Swiss warehouse within 24 hours. View active ingredient serums → Frequently Asked Questions About Polyglutamic Acid Is polyglutamic acid better than hyaluronic acid? In terms of pure water-binding capacity on the skin’s surface, yes—PGA can hold more moisture per gram than hyaluronic acid. However, it does not penetrate the skin, whereas hyaluronic acid also works in the upper layers of the skin. So neither active ingredient is “better” across the board; the combination yields the best results. What does polyglutamic acid do for the skin? It forms a fine, invisible moisture film that locks in water and reduces evaporation through the skin. This makes the skin feel smoother and plumper, and fine lines caused by dryness appear visibly reduced—a cosmetic benefit that is maintained with regular use. Can I use polyglutamic acid and hyaluronic acid together? Yes, the two actually complement each other perfectly: hyaluronic acid hydrates the upper layers of the skin, while polyglutamic acid seals in moisture at the surface like a lid. Apply the hyaluronic acid serum first, followed by the PGA product—or use a formulation that contains both. What skin types is polyglutamic acid suitable for? Basically, all skin types: PGA is considered low-irritating and very well-tolerated—even sensitive, dry, or mature skin benefits from it. Even oily skin needs moisture; the light, non-greasy texture of a PGA serum is often more comfortable for this than a rich cream. How often should I use polyglutamic acid? Daily, in the morning and evening, on slightly damp, cleansed skin. Follow up with a cream to prevent the locked-in moisture from evaporating. For an extra boost, use a sheet mask containing polyglutamic acid once or twice a week. 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