Best Azelaic Acid Serums in the UK: 2026 Buying Guide

What Is Azelaic Acid

Azelaic acid is a naturally occurring dicarboxylic acid found in barley, wheat, and rye. It was first developed as a pharmaceutical ingredient in the 1980s for the treatment of acne and hyperpigmentation, and has since accumulated a substantial body of clinical evidence supporting its use for multiple skin concerns.

In the UK, azelaic acid at concentrations up to 10 percent is classified as a cosmetic product and is available without prescription from Amazon UK, Boots, and Superdrug. At prescription strength (15 to 20 percent, sold as Finacea or Skinoren), it is a licensed medicine requiring a prescription from a GP or a prescriber service such as Dermatica or Skin+Me.

What makes azelaic acid stand out is its breadth of action. Unlike many skincare ingredients that address one concern well, azelaic acid works across acne, rosacea, and pigmentation simultaneously. This makes it a useful single ingredient for people who have multiple concerns and want to simplify their routine.

How Azelaic Acid Works

Azelaic acid operates through several distinct mechanisms, which explains why it is effective for such a wide range of skin concerns.

Antibacterial action

Azelaic acid inhibits the growth of Cutibacterium acnes (formerly Propionibacterium acnes), the bacteria that contributes to acne. Crucially, it does this without inducing bacterial resistance, which is a genuine advantage over some antibiotics used in acne treatment. Studies published in the British Journal of Dermatology have confirmed this bactericidal effect at concentrations as low as five percent.

Anti-inflammatory

Azelaic acid reduces the production of inflammatory cytokines in the skin. This is why it is particularly effective for inflammatory skin conditions such as papulopustular rosacea, where redness and pustules are driven by inflammation rather than bacterial overgrowth. A 2003 study published in the Journal of the American Academy of Dermatology found that 15 percent azelaic acid gel significantly reduced the inflammatory lesions associated with rosacea.

Tyrosinase inhibition

Azelaic acid inhibits tyrosinase, the enzyme responsible for melanin production. This makes it effective for treating post-inflammatory hyperpigmentation (the dark marks left behind after acne clears), melasma, and general uneven skin tone. Research published in the journal Dermatologic Surgery demonstrated that 20 percent azelaic acid cream produced significant improvements in hyperpigmentation in darker-skinned patients after 24 weeks of treatment.

Keratinocyte normalisation

Azelaic acid helps normalise the shedding of skin cells (keratinocytes). When this process goes wrong, pores become clogged and acne develops. By keeping the skin turning over at a healthy rate, azelaic acid reduces the formation of comedones (blackheads and whiteheads).

Which Concentration to Use

Over-the-counter azelaic acid products in the UK typically contain 10 percent azelaic acid. Prescription products, available through services such as Dermatica, Skin+Me, or your GP, contain 15 to 20 percent.

If you are new to azelaic acid, start with a 10 percent product. The Ordinary Azelaic Acid Suspension 10 percent is a good entry point, though its silicone-heavy formula has a distinct texture that some people find unfamiliar. The Inkey List Azelaic Acid Serum 10 percent has a more conventional serum texture and may be easier to introduce into an existing routine.

If you have used 10 percent consistently for eight to twelve weeks and are not seeing the results you want, consider moving to a prescription-strength product through a UK prescriber service. Dermatica and Skin+Me both offer azelaic acid as part of subscription plans that include a clinician consultation.

Products Reviewed

The nine products below are ranked by price, from most affordable to most premium. All are available in the UK in 2026. Prices are approximate and reflect current Amazon UK listings at time of publication.

How to Use Azelaic Acid in Your Routine

Azelaic acid fits into most skincare routines without much difficulty, but there are a few principles worth following to get the best results.

When in your routine

Apply azelaic acid after cleansing and any water-based serums (such as niacinamide or vitamin C) but before heavier products such as moisturiser or facial oil. In the morning it should go on before SPF. In the evening it can be used after cleansing and any actives you choose to use alongside it.

How often

Start with once daily, every other day, for the first two weeks. If your skin tolerates it well, move to once daily. Some people use azelaic acid twice daily (morning and evening) with no issues. Others find that twice daily causes dryness or sensitivity. Listen to your skin and adjust accordingly.

Layering with other actives

Azelaic acid pairs well with most skincare ingredients. It is particularly complementary with niacinamide, hyaluronic acid, and moisturisers. Use caution when combining it with other actives in the same session, particularly high-concentration AHAs, BHAs, or retinoids. If you are using a prescription retinoid or a strong exfoliant, introduce azelaic acid gradually and monitor for signs of over-sensitivity.

Do not use on broken skin

As with any active ingredient, do not apply azelaic acid to broken, bleeding, or significantly compromised skin. It can sting on broken skin and may delay healing. Wait until the skin barrier has recovered.

Frequently Asked Questions

Is azelaic acid safe to use during pregnancy?

Topical azelaic acid at cosmetic concentrations (10 percent) is generally considered safe during pregnancy, but you should confirm with your GP or midwife before using any new active ingredient while pregnant or breastfeeding. Prescription-strength azelaic acid products should only be used during pregnancy on the advice of a medical professional.

How long does azelaic acid take to work?

Most people start to see improvements in skin texture and reduction in active blemishes within four to six weeks of consistent use. For hyperpigmentation and post-inflammatory marks, expect to wait eight to twelve weeks for visible fading. Azelaic acid requires patience, but the results compound with continued use.

Can I use azelaic acid and vitamin C together?

Yes. Vitamin C (ascorbic acid) and azelaic acid work through different mechanisms and are compatible in the same routine. Apply vitamin C in the morning and azelaic acid in the evening, or use both in the morning if your skin tolerates it. Some formulations combine both ingredients in a single product.

What is the difference between The Ordinary and The Inkey List azelaic acid?

The Ordinary Azelaic Acid Suspension 10 percent has a silicone-heavy, cream-gel texture that some people find heavy or pill-prone under other products. The Inkey List SuperSolutions 10 percent Azelaic Acid Serum has a lighter, more conventional serum texture that absorbs quickly and does not interfere with SPF or makeup. Both contain the same 10 percent concentration. The Inkey List version is generally easier to use daily, particularly in the morning.

What is the difference between OTC and prescription azelaic acid?

Prescription-strength azelaic acid (15 to 20 percent, sold as Finacea or Skinoren) is more potent and more effective for moderate to severe rosacea and stubborn hyperpigmentation. It requires a prescription in the UK and is available through your GP or prescriber services such as Dermatica or Skin+Me. OTC products are 10 percent and available without prescription. For mild to moderate concerns, 10 percent OTC azelaic acid is usually sufficient.

Does azelaic acid help with rosacea?

Yes. Azelaic acid is one of the few topical ingredients with clinical evidence supporting its use for rosacea. The anti-inflammatory action reduces the redness, flushing, and pustules associated with papulopustular rosacea. Clinical studies have demonstrated significant improvements with 15 percent azelaic acid gel. The OTC 10 percent version is a good starting point for people with mild rosacea symptoms.