Anua Azelaic Acid Serum

Description

At NovaMedSpa.com, our role as licensed aesthetic educators is not to chase trends, but to evaluate ingredient science, formulation quality, and real-world usability through a clinical-aesthetic lens. As interest in redness-prone skin, uneven tone, and barrier-compromised complexions continues to grow, azelaic acid has emerged as one of the most widely discussed cosmetic ingredients in professional skin health conversations. Among the formulations gaining attention is Anua Azelaic Acid 10% + Hyaluron Redness Soothing Serum, a product positioned to support visibly calmer, smoother, and more balanced-looking skin without aggressive actives or exfoliation overload.

This article serves as an educational, research-based overview of Anua Azelaic Acid Serum for individuals seeking aesthetic skincare options that align with professional routines. While azelaic acid is often discussed in dermatologic contexts, it is important to clarify upfront that this product is classified as a cosmetic serum, not a prescription or medical treatment. Any references to skin benefits throughout this article reflect appearance-related support, not the diagnosis, treatment, or prevention of medical skin conditions.

Anua’s formulation combines 10% azelaic acid with hydration-supporting ingredients such as sodium hyaluronate, panthenol, ceramides, and botanical extracts, creating a profile designed for individuals who want visible refinement without excessive irritation. The inclusion of barrier-supportive components and calming plant derivatives places this serum within a category increasingly favored by medspas and skin professionals: gentle, non-comedogenic, redness-conscious skincare.

Throughout this research guide, we will explore how Anua Azelaic Acid Serum fits into modern aesthetic routines, who it may be best suited for, how its ingredients function from a cosmetic science standpoint, and what consumers should realistically expect. Our goal is to help readers make informed, responsible decisions while supporting their skin’s appearance with evidence-aligned formulations.

Product Overview

Anua Azelaic Acid Serum is a lightweight, water-based cosmetic serum formulated to support the look of clearer, calmer, and more balanced skin. Designed with sensitive and redness-prone skin types in mind, the product emphasizes barrier-friendly hydration, non-comedogenic texture, and gentle daily usability.

Rather than relying on a single aggressive active, Anua’s approach blends azelaic acid with humectants, soothing agents, and lipid-supportive ingredients to help maintain skin comfort over time.

Formulation

The serum is formulated with 10% azelaic acid, a concentration commonly used in cosmetic skincare for appearance refinement, paired with hydrating and calming ingredients to reduce the likelihood of dryness or visible irritation. The formula avoids heavy occlusives, making it suitable for layering within multi-step routines.

Key Ingredients

Key components include azelaic acid, sodium hyaluronate, niacinamide, panthenol, centella asiatica derivatives, ceramide NP, and botanical extracts traditionally used in calming skincare formulations.

Bottle Contents

• Lightweight serum texture
• Designed for dropper-based dispensing
• Intended for gradual integration into a routine

Guarantee

Anua offers consumer-facing satisfaction assurances through its official website. Buyers are encouraged to review the brand’s return and refund policy directly before purchase, as terms may vary.

Cost

Pricing varies by quantity purchased and promotional availability. (Full pricing breakdown is covered later in this guide.)

What Is Anua Azelaic Acid Serum?

Anua Azelaic Acid Serum is a cosmetic skincare product developed to support the appearance of skin tone clarity, texture smoothness, and overall calmness. At its core, the formula leverages azelaic acid, a naturally occurring compound found in grains, which has become popular in aesthetic skincare for its multi-functional cosmetic properties.

From an educational standpoint, azelaic acid is valued in cosmetic formulations because it interacts with the skin in a non-exfoliating, non-abrasive manner. Unlike alpha hydroxy acids or retinoids, azelaic acid does not aggressively accelerate cell turnover. Instead, it is commonly used in products designed to support the look of even tone and reduced surface congestion while maintaining barrier integrity.

What differentiates Anua’s serum is its supportive formulation environment. The inclusion of humectants like glycerin and sodium hyaluronate helps attract and retain moisture, while ingredients such as ceramides and hydrogenated lecithin assist in reinforcing the skin’s moisture barrier. Botanical extracts—including centella asiatica and aloe—are frequently used in cosmetic science for their skin-comforting properties.

Importantly, Anua Azelaic Acid Serum is not positioned as a medical treatment, nor should it be interpreted as a substitute for prescription therapies. Instead, it fits within a category of aesthetic maintenance products designed to complement professional skincare routines and medspa-guided regimens.

For individuals navigating redness-prone skin, uneven texture, or visible sensitivity, this type of formulation offers a way to support skin appearance gradually without overwhelming the skin with harsh actives. As with all cosmetic products, results vary based on skin type, consistency of use, and overall routine structure.

Who Is Anua Azelaic Acid Serum Specifically For?

Based on ingredient composition, texture, and formulation intent, Anua Azelaic Acid Serum is best suited for individuals seeking cosmetic support for visible skin concerns, rather than corrective medical intervention.

This serum may appeal to:

• Individuals with redness-prone or reactive-looking skin who want a calming, lightweight serum
• Those with combination or oily skin types looking for non-comedogenic hydration
• Users interested in tone-refining skincare without strong exfoliants
• Skincare enthusiasts transitioning toward barrier-supportive routines
• Individuals layering actives who need a gentler daily serum option

From an aesthetic educator’s perspective, this product is particularly relevant for people who experience visible sensitivity from over-exfoliation, environmental stressors, or inconsistent routines. The serum’s structure allows it to be used as part of a morning or evening regimen, provided sunscreen is applied during daytime use.

It is also suitable for individuals who prefer fragrance-light or calming-focused formulations, as the ingredient list prioritizes skin comfort rather than sensory intensity. That said, individuals with highly reactive or compromised skin should always perform a patch test and consult a qualified skincare professional before introducing new products.

This serum is not intended for:

• Treating medical skin conditions
• Replacing dermatologist-prescribed therapies
• Delivering immediate or dramatic results

Instead, it is designed for those who value consistent, incremental improvement in skin appearance through well-balanced cosmetic formulations.

Does Anua Azelaic Acid Serum Work?

When evaluating whether a cosmetic serum “works,” it’s critical to define success through an aesthetic lens, not a medical one. At NovaMedSpa.com, effectiveness is assessed by how well a product supports visible improvements in skin appearance, comfort, and overall balance—without overstimulation or barrier disruption.

Anua Azelaic Acid Serum is designed to work gradually by supporting multiple cosmetic pathways associated with calmer-looking, smoother skin. Rather than delivering immediate, aggressive exfoliation or rapid resurfacing, this formulation focuses on consistency, tolerance, and barrier compatibility. This approach aligns with current medspa trends that prioritize long-term skin health over short-term intensity.

Azelaic acid, when used at cosmetic concentrations such as 10%, is widely incorporated into skincare routines aimed at supporting the appearance of uneven tone, surface congestion, and redness-prone skin. Unlike stronger actives that rely on forced cell turnover, azelaic acid interacts with the skin in a more measured manner, making it suitable for users who may not tolerate retinoids or acids well.

What enhances the functionality of Anua’s serum is its supporting ingredient environment. Hydrators like glycerin and sodium hyaluronate help counterbalance potential dryness, while calming agents such as panthenol, allantoin, centella asiatica derivatives, and aloe vera contribute to skin comfort. Barrier-supportive components like ceramide NP and hydrogenated lecithin help reinforce the skin’s protective layer, which is essential for maintaining a smooth, even-looking complexion.

From an aesthetic research perspective, this serum “works” best when:

• Used consistently over several weeks
• Layered appropriately within a balanced routine
• Paired with daily sun protection

It is not designed to create overnight transformation. Instead, its strength lies in supporting visible skin clarity and calmness over time, particularly for individuals managing sensitivity, visible redness, or texture irregularities caused by environmental or routine-related stressors.

Disclaimer: Individual cosmetic results vary. This product is not intended to diagnose, treat, cure, or prevent any medical skin condition.

What Are the Ingredients in Anua Azelaic Acid Serum?

Anua Azelaic Acid Serum features a comprehensive ingredient list designed to balance performance with skin comfort. Below is an educational breakdown of the primary ingredients and their cosmetic roles.

Water
Serves as the base solvent, allowing uniform dispersion of active and supportive ingredients while maintaining a lightweight texture suitable for daily use.

Azelaic Acid
A multifunctional cosmetic ingredient commonly used to support the appearance of even skin tone and smoother texture. It is favored for its compatibility with sensitive-looking skin and non-exfoliating nature.

Propylene Glycol & Dipropylene Glycol
Humectant solvents that help improve ingredient delivery and maintain hydration by attracting moisture to the skin’s surface.

Sodium Hydroxide
Used in small amounts to stabilize and balance the formula’s pH, ensuring ingredient compatibility and skin tolerance.

1,2-Hexanediol & Ethylhexylglycerin
Preservative-support ingredients that help maintain product freshness while also offering mild humectant properties.

Panthenol (Provitamin B5)
A widely used cosmetic ingredient known for supporting skin softness and comfort. Often included in calming formulations.

Hydroxyethylcellulose
A thickening agent that provides the serum’s smooth, gel-like texture without heaviness.

Betaine Salicylate
A gentle salicylate derivative used cosmetically to support skin clarity and texture refinement without harsh exfoliation.

Glycerin
A cornerstone humectant that draws moisture into the skin, supporting plumpness and hydration.

Biosaccharide Gum-1
Known for its soothing and skin-conditioning properties, often used to enhance surface smoothness.

Allantoin
A calming agent frequently included in sensitive-skin products to support comfort and softness.

Dipotassium Glycyrrhizate
Derived from licorice root, this ingredient is commonly used in cosmetic formulations to support the appearance of calm, even-looking skin.

Melia Azadirachta (Neem) Leaf & Flower Extracts
Botanical extracts traditionally used in skincare for their purifying and balancing properties.

Camellia Sinensis (Green Tea) Leaf Water
Rich in naturally occurring antioxidants, often used to support skin resilience against environmental stressors.

Sodium Hyaluronate
A low-molecular form of hyaluronic acid that supports hydration and a smoother skin appearance.

Niacinamide
A versatile cosmetic ingredient known for supporting barrier function, refined texture, and overall skin balance.

Aloe Barbadensis Leaf Juice
Widely used for its soothing and hydrating properties, particularly in redness-conscious formulations.

Beta-Glucan
A polysaccharide used to support skin comfort and hydration.

Centella Asiatica Extracts (Leaf, Root, Madecassoside, Asiaticoside, Asiatic Acid, Madecassic Acid)
A complex of centella derivatives often referred to as “Cica,” commonly used to support calmness and barrier integrity.

Squalane
A lightweight emollient that mimics natural skin lipids, supporting softness without clogging pores.

Zinc PCA
Used cosmetically to support oil balance and skin clarity.

Butylene Glycol & Pentylene Glycol
Humectants that improve texture and moisture retention.

Caprylyl/Capryl Glucoside
A gentle surfactant and emulsifier that helps stabilize the formula.

Hydrogenated Lecithin & Ceramide NP
Barrier-support ingredients that help reinforce the skin’s natural lipid matrix.

Anua Azelaic Acid Serum Science

While Anua Azelaic Acid Serum itself is not backed by proprietary clinical trials, its formulation draws upon well-established cosmetic ingredient research. Azelaic acid has been extensively studied within dermatologic and cosmetic contexts, particularly for its compatibility with sensitive-looking skin and its ability to support visible clarity without aggressive exfoliation.

Supporting ingredients such as niacinamide, ceramides, panthenol, and centella asiatica derivatives are widely documented in cosmetic science literature for their roles in barrier support, hydration, and skin comfort. When combined thoughtfully, these ingredients help create a formulation that prioritizes tolerance and long-term usability, which is increasingly valued in professional skincare environments.

From a medspa education standpoint, this type of formulation reflects a shift away from overloading routines with multiple harsh actives, and toward balanced, barrier-conscious skincare that supports visible results over time.

Disclaimer: Ingredient research does not guarantee individual results. Cosmetic outcomes vary based on skin type and routine.

Anua Azelaic Acid Serum Benefits

When evaluating the benefits of a cosmetic serum like Anua Azelaic Acid Serum, it’s essential to frame results in terms of visible skin support, not medical outcomes. From an aesthetic research perspective, this formulation is designed to enhance how the skin looks, feels, and responds to daily stressors when used consistently as part of a well-structured routine.

Soothes & Calms the Skin With Natural Green Complexes

One of the most notable aesthetic benefits of Anua Azelaic Acid Serum is its focus on skin-soothing support. The formula incorporates aloe vera alongside multiple centella asiatica derivatives—often collectively referred to as “Cica”—which are widely used in cosmetic science for their calming and conditioning properties.

This “natural green” complex is especially relevant for individuals who experience visible redness or sensitivity triggered by environmental exposure, dehydration, or overuse of strong actives. Rather than masking redness, the formulation is designed to support a more balanced-looking complexion over time, helping skin appear calmer and more even-toned with consistent use.

Disclaimer: This product supports the appearance of calm skin and is not intended to treat medical skin conditions.

Non-Comedogenic Soothing Serum for Daily Use

Another key benefit of Anua Azelaic Acid Serum is its non-comedogenic design, meaning it is formulated to avoid ingredients commonly associated with pore congestion. This makes it suitable for individuals with combination or oily skin who still require hydration and barrier support.

The lightweight, serum-based texture absorbs efficiently without leaving a heavy or greasy residue, allowing it to layer well under moisturizers and sunscreen. This is particularly important in medspa-guided routines where multiple products are used in sequence.

For clients who have previously experienced breakouts or texture irregularities from richer formulations, a non-comedogenic soothing serum can be an essential component of maintaining a clearer-looking skin surface.

Gentle Yet Effective Ingredient Balance

Perhaps the most compelling benefit from an aesthetic standpoint is the serum’s gentle-yet-effective balance. While azelaic acid is the featured ingredient, it is supported—not overwhelmed—by hydrators, calming agents, and barrier lipids.

This balanced approach allows users to experience gradual visible refinement without the discomfort often associated with stronger exfoliating acids or retinoids. For individuals prioritizing long-term skin health, tolerance, and consistency, this benefit cannot be overstated.

Anua Azelaic Acid Serum: Pros and Cons

Pros

• Lightweight, non-comedogenic serum suitable for daily use
• Contains 10% azelaic acid within a barrier-supportive formulation
• Includes hydrating and calming ingredients like sodium hyaluronate, panthenol, and centella asiatica
• Suitable for sensitive-looking and redness-prone skin types
• Layers well with other skincare products

Cons

• Results are gradual and require consistent use
• Not intended to deliver dramatic or immediate changes
• May not be sufficient as a standalone solution for advanced aesthetic concerns
• Not a replacement for prescription-strength treatments

From a consumer and professional perspective, the pros outweigh the cons for individuals seeking cosmetic maintenance and appearance support, rather than aggressive correction.

What Is the Price of Anua Azelaic Acid Serum?

Anua Azelaic Acid Serum is priced competitively within the premium cosmetic skincare category. Pricing incentives are available for multi-unit purchases, which may appeal to individuals committed to long-term routine consistency.

Current pricing options include:

• Buy 1: $24
• Buy 2: $46
• Buy 3: $66

Multi-unit pricing may offer cost savings for users planning extended use, which aligns with the gradual nature of cosmetic skincare results.

Pricing Disclaimer: Prices are subject to change at any time. Always refer to the official Anua website for the most current pricing, promotions, and availability.

How to Apply Anua Azelaic Acid Serum

Proper application is essential for maximizing the cosmetic benefits of any serum while minimizing irritation.

1. Start with 1–2 drops per use, gradually increasing to up to 5 drops as tolerated.
2. Begin using 1–2 times per week, slowly increasing frequency over time.
3. May be used morning and evening as part of a consistent routine.
4. Apply between toner and moisturizer on clean, dry skin.
5. Use sunscreen in the morning routine, as with all active-containing products.

This gradual approach supports skin tolerance and aligns with professional aesthetic recommendations.

Are There Side Effects to Anua Azelaic Acid Serum?

Although Anua Azelaic Acid Serum is formulated for cosmetic use and designed with skin comfort in mind, it is still important to acknowledge that any active-containing skincare product may cause temporary reactions, particularly during the initial adjustment phase. From an aesthetic education standpoint, understanding potential side effects allows users to integrate products more safely and confidently.

Common, non-medical cosmetic reactions may include:

• Mild tingling or warming sensation upon application
• Temporary redness, especially during early use
• Slight dryness or tightness as the skin adapts
• Increased sensitivity when layered with other actives

These responses are often associated with the skin acclimating to azelaic acid and are typically minimized by gradual introduction, reduced frequency, and proper hydration. Anua’s formulation attempts to counterbalance these effects through humectants, soothing botanicals, and barrier-supportive lipids.

Individuals with highly reactive or compromised skin barriers should take additional precautions, including patch testing and avoiding simultaneous use with strong exfoliants or retinoids during the adjustment period.

It is also important to clarify what does not constitute a normal cosmetic reaction. Persistent burning, significant swelling, or prolonged irritation are not expected outcomes and should prompt discontinuation and consultation with a licensed skincare professional.

Disclaimer: This product is a cosmetic serum and is not intended to diagnose, treat, cure, or prevent any medical skin condition. Individual tolerance varies.

Who Makes Anua Azelaic Acid Serum?

Anua is a skincare brand recognized for its minimalist, ingredient-conscious approach to cosmetic formulation. The brand emphasizes balance, simplicity, and barrier awareness, aligning with trends in professional skincare that prioritize long-term skin resilience over aggressive correction.

From a formulation standpoint, Anua focuses on:

• Skin-compatible active concentrations
• Multi-functional supporting ingredients
• Lightweight textures suitable for layering
• Avoidance of unnecessary fragrance overload

While Anua is not a medical provider or pharmaceutical manufacturer, its products are developed within the cosmetic skincare category and distributed globally through official brand channels. Importantly, product formulation, manufacturing, and quality control remain the responsibility of the brand itself, not individual practitioners or third-party sellers.

For consumers, this distinction matters. Cosmetic skincare brands are held to ingredient safety and labeling standards, but they do not undergo the same approval process as prescription medications. Understanding this separation helps set realistic expectations and supports informed purchasing decisions.

Does Anua Azelaic Acid Serum Really Work?

From an aesthetic research perspective, the effectiveness of any cosmetic serum—including Anua Azelaic Acid Serum—depends heavily on context. No topical product operates in isolation. Skin appearance is influenced by daily habits, environmental exposure, routine consistency, and overall skin barrier health.

Cosmetic serums tend to perform best when:

• Applied consistently over several weeks
• Integrated into a routine that includes cleansing, hydration, and sun protection
• Supported by lifestyle habits that minimize excessive irritation

Azelaic acid-based products are often favored in professional routines because they offer visible refinement without aggressive resurfacing. When combined with hydration-supporting ingredients, the result is typically gradual improvement in the appearance of skin tone balance, smoothness, and surface clarity.

However, it is essential to be transparent: cosmetic skincare does not override foundational skin health factors. Excessive sun exposure, inconsistent routines, and overuse of harsh actives can undermine even the best-formulated products.

This serum is best viewed as a supportive tool, not a corrective intervention. Individuals who approach skincare with patience and routine discipline are more likely to experience favorable cosmetic outcomes.

Is Anua Azelaic Acid Serum a Scam?

Anua Azelaic Acid Serum does not exhibit characteristics commonly associated with deceptive or misleading cosmetic products. The brand provides transparent ingredient disclosure, realistic cosmetic positioning, and does not promote exaggerated or instant-result claims.

From a professional evaluation standpoint, signs that a skincare product is not a scam include:

• Clear cosmetic classification
• Absence of disease-treatment claims
• Realistic usage instructions
• Ingredient lists aligned with formulation intent

That said, unrealistic consumer expectations can sometimes lead to disappointment. This typically occurs when cosmetic products are mistakenly expected to deliver medical-grade outcomes. Understanding the distinction between aesthetic support and medical treatment is key to evaluating value accurately.

When used for its intended purpose—supporting the appearance of calmer, more balanced skin—Anua Azelaic Acid Serum aligns with legitimate cosmetic skincare standards.

Is Anua Azelaic Acid Serum FDA Approved?

This is a critical clarification.

Cosmetic skincare products, including Anua Azelaic Acid Serum, are not FDA approved. The U.S. Food and Drug Administration does not approve cosmetic products before they are sold. Instead, cosmetic brands are responsible for ensuring ingredient safety, accurate labeling, and compliance with applicable regulations.

Azelaic acid itself exists in both cosmetic and prescription contexts. Prescription formulations are regulated as drugs, while cosmetic concentrations—such as those found in this serum—are regulated under cosmetic guidelines.

This distinction does not indicate inferiority; it simply reflects regulatory categorization. Consumers should be cautious of any cosmetic product claiming FDA approval, as such claims are misleading.

Where to Buy Anua Azelaic Acid Serum

To ensure product authenticity, formulation integrity, and proper storage conditions, Anua Azelaic Acid Serum is best purchased directly through the official Anua website. Buying from authorized sources reduces the risk of expired, improperly stored, or altered products, which can compromise cosmetic performance and skin tolerance.

For individuals incorporating this serum into a professional or medspa-guided skincare routine, purchasing directly from the brand also provides access to official customer support, satisfaction policies, and current promotional pricing. Third-party resale platforms often lack these safeguards.

From an aesthetic education standpoint, sourcing skincare from official channels is a best practice—particularly for active-containing products intended for gradual, consistent use.

Is Anua Azelaic Acid Serum Really on Amazon, eBay, and Walmart?

Anua Azelaic Acid Serum on Amazon

Anua Azelaic Acid Serum is not currently offered through Amazon or Amazon-affiliated sellers. This decision allows the brand to maintain quality control, ensure proper handling, and prevent unauthorized resale. Consumers seeking guaranteed authenticity should purchase only from the official Anua website.

Anua Azelaic Acid Serum on eBay

The product is not sold on eBay or through any eBay partner stores. Avoiding third-party marketplaces helps reduce the risk of compromised or improperly stored skincare products. For safety and quality assurance, Anua recommends purchasing directly from its official distribution channel.

Anua Azelaic Acid Serum on Walmart

Anua Azelaic Acid Serum is not available in Walmart retail locations or on Walmart’s online marketplace. By limiting distribution, the brand maintains oversight of storage conditions and product integrity. The official website remains the only authorized source.

Anua Azelaic Acid Serum Real Customer Reviews and Testimonials

Consumer feedback surrounding Anua Azelaic Acid Serum often highlights its lightweight texture, calming feel, and ease of integration into existing skincare routines. Many users report that the serum absorbs quickly and layers well under moisturizers and sunscreen without pilling.

Some individuals note gradual improvements in how their skin looks over several weeks of consistent use, particularly in terms of overall smoothness and visible balance. Others appreciate that the formula does not feel overly harsh, making it easier to maintain long-term routine consistency.

As with all cosmetic products, experiences vary. Not every user reports noticeable changes, especially within short timeframes. These testimonials should be viewed as individual experiences, not guaranteed outcomes.

Disclaimer: Testimonials reflect personal opinions and cosmetic experiences. Results are not typical or guaranteed.

More Anua Azelaic Acid Serum User Experiences

Additional feedback suggests that the serum appeals to users seeking low-irritation alternatives to stronger actives. Individuals transitioning away from aggressive exfoliants often describe this product as supportive rather than disruptive.

Users with combination skin frequently mention that the serum provides hydration without heaviness, while those with sensitivity concerns value its calming-focused ingredient profile. These experiences reinforce the importance of matching cosmetic products to individual skin needs and expectations.

Conclusion: Should You Consider Anua Azelaic Acid Serum?

From a licensed aesthetic educator’s perspective, Anua Azelaic Acid Serum represents a well-balanced cosmetic option for individuals seeking to support the appearance of calmer, smoother, and more even-looking skin. Its formulation prioritizes tolerance, hydration, and barrier awareness—qualities increasingly valued in modern skincare routines.

This product is not designed to replace medical treatments or deliver instant transformation. Instead, it fits best within a long-term, consistency-driven skincare strategy, particularly for users navigating visible redness, sensitivity, or texture irregularities.

For those who value minimalist formulations, non-comedogenic textures, and gradual results, Anua Azelaic Acid Serum may serve as a supportive addition to a well-structured routine.

Anua Azelaic Acid Serum FAQs

1. Is Anua Azelaic Acid Serum a medical treatment?
No. It is a cosmetic skincare product designed to support skin appearance.

2. Can it be used daily?
Yes, once skin tolerance is established.

3. Is it suitable for sensitive skin?
Many users find it suitable, but patch testing is recommended.

4. Does it replace prescription azelaic acid?
No. Cosmetic and prescription products serve different purposes.

5. Can it be used with other actives?
Yes, but gradual layering is advised.

6. Is sunscreen necessary when using this serum?
Yes. Daily sun protection is recommended.

7. How long before results are visible?
Cosmetic results typically develop over several weeks.

8. Is it fragrance-free?
The formulation focuses on low-irritation ingredients.

9. Can it be used morning and night?
Yes, depending on skin tolerance.

10. Where should it be applied in a routine?
Between toner and moisturizer.