Azelaic Acid Guide: How to Use, Strengths & Niacinamide Comparison

“What exactly is azelaic acid?” “Can I include it in my skincare routine if I'm concerned about visible pores or oily skin?” “And how does it compare with niacinamide?”

If you've been exploring skincare ingredients lately, you've probably come across the name azelaic acid. It's appearing more frequently in beauty discussions and product descriptions, yet some explanations can feel surprisingly technical.

Azelaic acid is a naturally occurring dicarboxylic acid that has been studied in dermatology for decades. Today, it is also used as a skin-conditioning ingredient in a variety of cosmetic serums, gels and creams.

The ingredient often comes up in conversations about visible pores, oily skin and uneven-looking skin texture. However, choosing an azelaic acid product involves more than simply looking at the ingredient name.

For example, products may contain concentrations such as 5%, 10%, 15% or 20%. A higher percentage does not automatically mean that a product is a better match for your skin. The formulation, texture and recommended application method also matter.

Another common question is how azelaic acid differs from niacinamide. Although both appear in modern skincare products, they belong to different chemical families and have different research backgrounds.

In this guide, we'll explore what azelaic acid is, why it attracts attention in skincare, how different strengths compare, and how to use azelaic acid products in a morning or evening routine.

We'll also look at niacinamide, other popular ingredients and moisturising skincare, with helpful beauty facts along the way. Whether you're just beginning to explore skincare ingredients or reviewing your routine in your 40s or 50s, there's plenty to discover.

Chapter 1 | What Is Azelaic Acid? Origins, Characteristics and Skincare History

Azelaic acid is an organic compound found in nature and associated with grains such as wheat, barley and rye.

Chemically, it belongs to a group of substances called dicarboxylic acids. Its molecular structure contains nine carbon atoms and two chemical groups known as carboxyl groups.

That might sound complicated, but the important point is simple: azelaic acid is a specific, well-defined chemical compound.

When you think of natural beauty ingredients, you might imagine rose extracts, lavender or oils obtained from plant seeds.

Unlike botanical extracts, which typically contain a mixture of different substances, azelaic acid has a clearly defined molecular structure.

The azelaic acid used in skincare products is manufactured and refined for its intended use as a cosmetic ingredient.

And here's something you may find surprising: azelaic acid is not a newly discovered ingredient.

It has a long history of research in dermatology, where scientists have investigated its relationship with skin cell development, microorganisms found on the skin and the processes involved in skin pigmentation.

This research history has also led to the development of medicinal azelaic acid creams and gels in certain countries.

At the same time, azelaic acid is used as a skin-conditioning ingredient in cosmetic products designed for everyday skincare.

It's useful to distinguish between medicinal formulations and ordinary cosmetics. Even when they contain an ingredient with the same name, the products may have different intended purposes, regulatory classifications and directions for use.

Interest in azelaic acid also reflects a broader trend in skincare: more people are learning to recognise ingredients rather than choosing products by brand name alone.

Niacinamide, retinol and ceramides are now familiar names in beauty conversations, even though they once sounded highly technical.

Azelaic acid belongs to that growing collection of ingredients worth understanding when exploring the world of skincare.

Chapter 2 | Azelaic Acid, Pores, Sebum and Acne: Understanding the Skin

Search for azelaic acid online and you'll soon encounter words such as pores, sebum, acne, redness and pigmentation.

Why does one ingredient appear in discussions about so many different skin concerns?

The answer lies partly in its history of dermatological research, which has explored several biological processes occurring within the skin.

To understand the connection, let's begin with the structure of a pore.

Hair follicles are associated with sebaceous glands, which produce sebum. Sebum is one of the substances that contributes to the natural oily film found on the skin's surface.

Although we often associate sebum with shine or an oily complexion, it is a normal part of the skin's biology.

The forehead and nose generally have relatively active sebaceous glands, which helps explain why these areas can feel oilier than the cheeks or around the mouth.

Inside the hair follicle, skin cells also undergo a natural process called keratinisation. This involves the development of keratinised cells as part of the skin's normal renewal processes.

When sebum and keratinised material accumulate around the follicular opening, the pore can become blocked. This process is relevant to the biological development of acne.

Azelaic acid has been studied in dermatology in connection with keratinisation and microorganisms found on the skin.

Researchers have also investigated its relationship with melanin production.

Melanin is the pigment that contributes to the colour of our skin and hair. It is also involved in the body's natural response to ultraviolet radiation.

An enzyme called tyrosinase plays a role in the process of melanin production, and azelaic acid has been investigated in relation to this area of skin science.

These findings provide scientific background about the ingredient. However, research involving skin biology or medicinal formulations should not automatically be interpreted as a claim about the performance of every cosmetic product containing azelaic acid.

So what should you consider when choosing a cosmetic product containing azelaic acid?

In everyday cosmetics, azelaic acid may be included as a skin-conditioning ingredient. The product's overall formulation, texture and other ingredients are important parts of the selection process.

For example, someone who prefers a lightweight finish around the forehead and nose may enjoy the feel of a serum or gel.

Someone who prefers a richer texture on the cheeks may be more interested in pairing their skincare routine with a moisturising cream.

Persistent acne or significant inflammation is best discussed with a qualified healthcare professional, as these concerns may require assessment beyond ordinary cosmetic skincare.

Understanding the basics of pores and sebum makes it easier to evaluate skincare products thoughtfully rather than relying solely on trends or ingredient names.

Chapter 3 | Azelaic Acid 5%, 10%, 15% and 20%: What's the Difference?

If you've started comparing azelaic acid skincare products, you've probably noticed percentages such as 5%, 10%, 15% and 20%.

It's natural to wonder whether a higher percentage is better, or which concentration makes the most sense for someone exploring azelaic acid for the first time.

The key point is that concentration is only one part of the picture. A product's formulation, intended use and directions are just as important when deciding whether it suits your skincare routine.

Azelaic acid has limited solubility in water, which makes formulation technology an interesting part of its development.

Some formulations contain finely dispersed particles of azelaic acid, while others use technologies designed to incorporate the ingredient in dissolved form.

This means that two products displaying different percentages cannot necessarily be compared on concentration alone.

The percentages may look straightforward, but they don't tell you everything about how a product is designed.

An interesting example comes from research announced by Rohto Pharmaceutical in September 2026.

The company reported a comparative study involving a serum containing 3% dissolved azelaic acid and a cream containing 20% dispersed azelaic acid.

The 12-week study involved 28 participants aged 18–39 and compared specific formulations under defined research conditions.

What makes this research interesting is the distinction between the ingredient being dissolved in the formulation and being dispersed as fine particles.

It illustrates an important concept in cosmetic development: how an ingredient is formulated can be an important research question, alongside how much of it is included.

The study does not mean that every 3% product is equivalent to every 20% product. Its findings relate to the formulations and conditions investigated.

For someone choosing an azelaic acid cosmetic for the first time, a helpful starting point is a product with clear directions, a suitable texture and a formulation that fits comfortably into their existing routine.

If you prefer a quick morning routine before applying makeup, you might be drawn to a lightweight serum. If you enjoy richer textures in the evening, a cream may feel more appealing.

Ultimately, the best choice is not simply the highest percentage on the label. It's a product whose design and recommended use fit your preferences and skincare needs.

Chapter 4 | Azelaic Acid vs Niacinamide: What Makes Them Different?

Azelaic acid and niacinamide are often mentioned together in skincare discussions, but they are not the same type of ingredient.

Azelaic acid belongs to the dicarboxylic acid family, while niacinamide is a form of vitamin B3.

Niacinamide is also known as nicotinamide. Within the human body, it is associated with coenzymes involved in normal energy metabolism.

In cosmetics, niacinamide appears in a wide variety of products, including toners, serums, lotions and creams.

Research involving niacinamide has explored subjects such as hydration within the outer layer of the skin and the skin barrier.

Azelaic acid, by comparison, has a different dermatological research history, including studies of keratinisation and pigmentation processes.

Let's compare the two ingredients from a practical skincare perspective.

So which should you choose?

If you're looking for a toner, lotion or cream as part of a moisturising-focused routine, you may come across plenty of products formulated with niacinamide.

If you're specifically interested in exploring azelaic acid, you can compare products by their concentration, serum or cream format, and the other ingredients included in the formula.

Niacinamide is also used as an active ingredient in certain regulated skincare products in Japan. Product classifications and permitted descriptions depend on the relevant market and regulatory framework.

Some cosmetics contain both azelaic acid and niacinamide. These products are developed with consideration for the overall formulation, ingredient compatibility and product stability.

If you want to layer separate products containing the two ingredients, follow the directions for each product. We'll explore layering with other popular ingredients in Chapter 7.

Neither azelaic acid nor niacinamide is automatically the better choice for everyone.

Understanding their differences simply gives you another useful way to compare products and choose what fits your own skincare routine.

Chapter 5 | How to Use Azelaic Acid: Morning and Night Skincare Routines

If you're thinking about adding an azelaic acid product to your skincare routine, one of the first questions is likely to be, “When should I use it?”

Should it go before or after toner? Can it be used in the morning? And what about using it every day?

Azelaic acid itself is not limited to nighttime use. Some products are designed for morning and evening application, but the correct order and frequency depend on the individual formulation.

Because azelaic acid is available in different product formats, including serums, gels and creams, the manufacturer's directions should always be your starting point.

For example, if you have a serum that is intended to be applied after toner, a skincare routine might look like this:

When applying a serum, use the amount recommended on the packaging and spread it gently without rubbing the skin aggressively.

Whether a product is intended for the entire face or selected areas will also depend on its directions. Pay particular attention to instructions about avoiding the eyes, lips and other sensitive areas.

For a morning routine, it's worth considering how your serum feels beneath sunscreen and makeup.

A lightweight formula may appeal to someone who prefers a quick morning routine, while a creamier texture may feel more enjoyable during a relaxed evening skincare ritual.

What about daily use?

Some azelaic acid cosmetics are designed for everyday application. However, when introducing a new product, it's important to follow the recommended amount and frequency while paying attention to how your skin responds.

Rather than introducing several unfamiliar serums at once, consider adding one new product at a time. This makes it easier to understand how each item fits into your existing routine.

Some azelaic acid products can cause sensations such as tingling, dryness or irritation. If significant redness, itching or persistent discomfort occurs, discontinue use and seek advice from a qualified healthcare professional when appropriate.

Whether you prefer a simple morning routine or enjoy spending more time on your skincare in the evening, understanding how your products are intended to be used makes the experience easier.

The goal is a routine that feels comfortable and fits naturally into your day.

Chapter 6 | Azelaic Acid for Sensitive or Dry Skin: Skincare in Your 40s and 50s

If you have sensitive or dry skin, you might wonder whether an azelaic acid product belongs in your skincare collection.

When choosing an azelaic acid cosmetic for sensitive or dry skin, consider the complete formulation, recommended use and current condition of your skin rather than focusing only on the percentage displayed on the label.

First, it helps to understand that sensitive skin and dry skin are not exactly the same thing.

The term “sensitive skin” is often used to describe skin that reacts easily to cosmetics, friction, changes in temperature or other environmental factors.

Dry skin, meanwhile, is associated with the skin's moisture and oil balance. The two descriptions may overlap, but they refer to different characteristics.

Skincare preferences can also change over time.

Perhaps you once preferred lightweight products because your forehead and nose felt oily, but now find yourself reaching for a richer moisturiser around your cheeks and mouth.

For some women, the hormonal changes associated with perimenopause and menopause can influence how the skin feels. Climate, indoor heating, air conditioning and everyday lifestyle factors also play a part.

Rather than assuming your entire face needs the same texture, you may prefer different products for different areas.

For instance, a lightweight product may feel pleasant on the T-zone, while a richer moisturiser may suit your preferences around the cheeks.

If moisturising is a priority, you may also wish to explore skincare products containing ingredients such as glycerin, hyaluronic acid or ceramides.

Ceramides are naturally present in the lipid structures between cells in the stratum corneum, the outermost layer of the skin.

Although this layer is remarkably thin, it plays an important role in the skin's natural moisture balance and its relationship with the surrounding environment.

Understanding the difference between a skin-conditioning serum and a moisturising cream can help you decide how to organise your daily routine.

If your skin tends to feel sensitive, introduce unfamiliar cosmetic products carefully and follow the manufacturer's guidance.

Testing a small area first can be useful, although it cannot predict every possible skin reaction. If you currently have a skin condition or use prescribed topical medication, consult a qualified healthcare professional before changing your routine.

Skincare in your 40s and 50s doesn't have to follow a rigid set of rules. The more useful approach is to pay attention to your skin's present condition and choose products that suit your everyday preferences.

Chapter 7 | Can You Use Azelaic Acid with Retinol or Vitamin C? Layering and Derivatives Explained

If you're interested in adding azelaic acid to your routine, you may already own products containing niacinamide, retinol, vitamin C or exfoliating acids.

Can these ingredients be used together?

Some products containing azelaic acid can be incorporated into routines that include other skincare ingredients. However, whether a particular combination is suitable depends on the complete products, their directions and your skin's response.

Let's begin with niacinamide, which we compared with azelaic acid in Chapter 4.

Some cosmetic formulas contain both ingredients. When manufacturers develop these products, they consider how the ingredients fit together within the formulation, including aspects such as texture and stability.

Layering two separate products is a different situation, particularly when they come from different brands and contain other ingredients.

Retinol is another popular ingredient. It belongs to the vitamin A family and appears in a variety of cosmetic serums and creams.

Some retinol products are specifically intended for evening use or recommend a particular application schedule. If you want to use retinol and azelaic acid products in the same routine, check the directions for both and be mindful of potential irritation.

Vitamin C is also widely discussed in skincare, but it isn't always present in cosmetics in the same chemical form.

Products may contain ascorbic acid or one of several vitamin C derivatives. These substances can differ in their chemical properties and formulation requirements.

It's therefore useful to consider the actual products rather than assuming all vitamin C formulas behave alike.

What about AHA and BHA exfoliating products?

These products can vary widely in formulation and recommended use. Layering multiple products that may feel irritating on the skin can require particular care, especially if your skin is already sensitive.

Depending on the individual product instructions, some people may prefer using different products at different times of the day rather than applying everything together.

If you are using prescription topical medication, discuss product combinations with your prescribing clinician or pharmacist.

There's another ingredient-related detail that often causes confusion: the difference between azelaic acid and azelaic acid derivatives.

You might come across an ingredient called Potassium Azeloyl Diglycinate, sometimes referred to as an azelaic acid derivative.

In Japanese ingredient listings, it is commonly written as アゼロイルジグリシンK.

Although its chemical structure is related to azelaic acid, Potassium Azeloyl Diglycinate is a different ingredient with its own chemical properties.

Derivatives may be developed to have different formulation characteristics, including solubility. They should not automatically be treated as identical to the original substance.

So if a product mentions an “azelaic acid-derived ingredient”, it's worth checking the complete ingredient list to see what is actually included.

Azelaic acid, niacinamide, retinol and vitamin C each have their own properties and research backgrounds.

Learning about these differences is a useful way to make more informed choices without feeling that you need to include every trending ingredient in your skincare collection.

Chapter 8 | Moisturising Skincare and New Zealand Beauty Brands Worth Exploring

Once you begin learning about ingredients such as azelaic acid and niacinamide, it's natural to become more curious about the other products you use every day.

Alongside ingredient-focused serums, moisturising skincare remains an enjoyable part of a well-rounded beauty routine.

At Brilliant Life Products NZ, we introduce skincare products from brands with New Zealand connections, including LANOCREME and Ninety Nature.

If you enjoy exploring beauty ingredients associated with natural materials, LANOCREME is an interesting brand to discover.

LANOCREME is known for skincare products that include lanolin, an ingredient obtained from wool.

Lanolin is refined from wool grease and is used in cosmetics as an emollient ingredient that helps maintain the skin's moisture.

New Zealand is famous for its sweeping green pastures and sheep farming. Ingredients associated with wool have a long history, and lanolin is one example of how materials connected with sheep farming also find a place in skincare.

LANOCREME offers a selection of skincare products, including day creams and night creams, allowing you to explore different textures for different moments in your routine.

Perhaps you prefer a comfortable cream as you prepare for the day, or enjoy taking a little extra time to apply your evening moisturiser.

If you're drawn to botanical-inspired skincare, you may also enjoy discovering the LAVENDER RADIANCE range from Ninety Nature.

Inspired by lavender, this collection includes lotions, toners, serums, eye creams and face creams.

It's an appealing collection to explore if you enjoy building a routine around different skincare textures, from lightweight liquids to richer creams.

LANOCREME also offers additional beauty products such as facial masks, hand care and lip care, making it possible to enjoy a wider range of everyday skincare rituals.

These brands are introduced here as complementary moisturising skincare options, not as products specifically containing azelaic acid.

Brilliant Life Products NZ has been bringing beauty and wellness products from New Zealand to customers for more than 15 years.

Whether you're interested in the latest ingredient discussions or prefer skincare inspired by traditional natural materials, there are many enjoyable ways to explore your beauty routine.

Daily skincare is also about simple habits, including sun protection when appropriate. Sunscreen, hats, clothing and shade can all form part of a thoughtful daytime routine.

From a carefully formulated modern cosmetic ingredient to lanolin derived from wool, the world of skincare offers an extraordinary range of materials to discover.

If researching azelaic acid has inspired you to explore your beauty routine more closely, why not take the opportunity to discover a moisturiser, lotion or cream that you genuinely enjoy using?

Q1. Should I keep azelaic acid skincare products in the refrigerator?

Follow the storage instructions provided by the manufacturer. Unless refrigeration is specifically recommended, cosmetics are generally best stored away from direct sunlight and extreme temperatures in a location with relatively stable conditions.

Q2. What should I do if an azelaic acid product gets into my eyes?

Rinse the affected eye promptly with plenty of clean water without rubbing it. If pain or discomfort continues, seek advice from an eye care professional.

Q3. Can I use azelaic acid skincare products during pregnancy or breastfeeding?

Products can differ in their formulations and intended purposes. If you are pregnant or breastfeeding and considering a new azelaic acid product, check the complete product information and consult your doctor or pharmacist for individual guidance.

Q4. How long can I use an azelaic acid product after opening it?

Follow any expiry date or period-after-opening guidance shown on the packaging. Keep the product clean during use, and if you notice an unusual change in its colour, smell or consistency, stop using it and contact the manufacturer for advice.

Azelaic acid is a naturally occurring dicarboxylic acid with a long history of dermatological research.

Cosmetic products containing azelaic acid come in different strengths and textures, so understanding the formulation and recommended use is more helpful than choosing a product based on the percentage alone.

Learning how azelaic acid compares with niacinamide, retinol and vitamin C can also make it easier to understand the ingredients found in modern skincare products.

Alongside your interest in skin-conditioning ingredients, a moisturising routine can be another enjoyable way to care for your skin every day.

At Brilliant Life Products NZ, you can explore brands such as LANOCREME and Ninety Nature, each offering its own approach to everyday skincare. We hope you'll enjoy discovering products that suit your preferences and make your beauty routine a little more special.

This article draws on specialist dermatology information and primary research relating to azelaic acid and cosmetic formulation. Findings from dermatological research are discussed separately from claims about ordinary cosmetic products.

1. DermNet New Zealand | Azelaic Acid
A specialist dermatology resource covering the characteristics, research background and precautions associated with azelaic acid.
Read the DermNet reference

2. Rohto Pharmaceutical Co., Ltd. | Azelaic Acid Formulation Research (8 September 2026)
An official research announcement discussing a comparison between a formulation containing 3% dissolved azelaic acid and a cream containing 20% dispersed azelaic acid.
Read the official Rohto research announcement (Japanese)