ANUA Azelaic Acid 10 Hyaluron Redness Soothing Serum - Fragrance-Free Blemish Serum

"Skin That Gets Oily and Reactive at the Same Time Needs a Serum That Doesn't Treat Those as Separate Problems"

I'm Linh. Dance instructor, backup dancer, Hongdae. My skin type is oily on the T-zone and sensitive in the places that count, which means most actives designed for blemish-prone skin are too blunt for what I'm working with.

I don't pick products for their aesthetics. I pick them because my schedule has no room for a flare-up the day before a showcase. The ANUA Azelaic Acid 10 Hyaluron Redness Soothing Serum is built for a specific combination problem: active blemishes, leftover marks, and redness, without the irritation trade-off that usually comes with a 10% active. The formula is fragrance-free. The texture is watery. And the introduction protocol tells you exactly how to use it without breaking your skin in the process.

That last part matters more than people realise.

What does 10% Azelaic Acid do for blemish-prone skin?

It works on two things at once. For active blemishes, Azelaic Acid targets the bacteria and inflammation driving the breakout. For what's left behind, it's formulated to fade the look of post-blemish dark spots and refine uneven texture over time. At 10%, the concentration is high enough to be effective. The graded introduction protocol exists for exactly that reason.

💪 Linh's Note: Azelaic Acid - a dicarboxylic acid found naturally in grains like wheat and barley, used in cosmetics for its antibacterial, anti-inflammatory, and melanin-inhibiting properties. At 10% concentration, it's considered an active ingredient rather than a supporting one.

Why does this serum leave white powder on my skin or the bottle?

That's the Azelaic Acid ingredient itself. It's a naturally crystalline compound, and at higher concentrations, some residue on the bottle or the skin surface is normal. The product specifically states this is safe and expected with regular use. It is not a product defect. If you're seeing it on your skin, it means the active is present and concentrated.

Does this serum work for sensitive skin, or will it cause irritation?

The formula is designed to manage the tension between effective and gentle. On one side: Cica (Centella Asiatica), Blue Tansy Oil, and Panthenol work specifically to calm redness and support the barrier while the Azelaic Acid does its job. On the other side: the introduction protocol (starting at 1-2 drops, 1-2 times per week, building gradually) exists precisely because 10% is a meaningful concentration. The clinical testing confirmed non-comedogenic status and immediate temporary calming after application. Sensitive skin can use this, but the graded schedule is not optional.

💪 Linh's Note: Panthenol - the stable form of vitamin B5. Attracts and retains moisture, supports skin barrier repair, and reduces sensitivity at the surface level. Standard in formulas pairing actives with calming agents. Centella Asiatica (Cica) - a botanical extract with documented anti-inflammatory properties. The ingredient list specifies four Centella-derived components: Centella Asiatica Extract, Centella Asiatica Leaf Extract, Centella Asiatica Root Extract, and Madecassoside, which is one of the active compounds isolated from the plant.

Also Worth Considering: De:maf Panthenol 30% Wonder Drops Ampoule

What is the green colour in this serum?

It comes from the botanical actives in the formula, specifically Blue Tansy Oil and the Cica complex. These plant-derived ingredients carry a natural green pigment. The colour is not artificial dye added for aesthetics. It's a visual indicator that the calming complex is present. Blue Tansy Oil has natural anti-inflammatory properties and is responsible for the characteristic green-to-teal tone in formulas that include it.

💪 Linh's Note: Blue Tansy Oil - extracted from Tanacetum annuum, a plant native to Morocco. Its vivid blue-green colour comes from chamazulene, a compound formed during the steam distillation process. Used in cosmetics for its soothing and anti-inflammatory effect on reactive skin.

How do I start using this without overdoing it?

The protocol is specific and worth following. Start with 1-2 drops, 1-2 times per week. Increase frequency and drop count gradually as your skin adjusts, up to twice daily with a maximum of 5 drops. Apply between toner and moisturiser. Sunscreen is required if using in the morning. Skin pilling or dryness can occur with too much product too fast - the moisturiser step after this is functional, not optional. Build slowly. The serum works at the pace your skin allows.

Can this replace a niacinamide serum, or do I need both?

The ingredient list does include niacinamide, so there is some tone-evening function built into this formula. Whether it replaces a standalone niacinamide serum depends on what you're asking niacinamide to do. For pore appearance and sebum regulation, a dedicated higher-concentration niacinamide serum will deliver more of that specific effect. For post-blemish marks on oily and sensitive skin, this formula addresses the same concern from a different and more targeted mechanism - the Azelaic Acid handles the pigmentation pathway directly. Different jobs. Potentially both worth keeping.

What Works

If Your Skin Breaks Out and Then Holds Onto the Mark: This is designed for both problems in sequence. The Azelaic Acid targets the bacteria driving breakouts and then works on fading the post-blemish discolouration that follows, using a single product across both stages.

Fragrance Is Off the Table: No artificial fragrance in the formulation. For oily or sensitive skin types where fragrance is a common irritation trigger, this is a real functional advantage, not just a marketing label. Clean formulas for reactive skin should not require compromise on efficacy.

The Green Is the Formula Working: The natural tint is not a colour additive. It comes from the Blue Tansy Oil and Cica complex, the same ingredients responsible for the calming function. If you're looking for visual confirmation that the soothing ingredients are present and concentrated, this is it.

Wondering Whether the Dose Protocol Is Just Caution Language? It isn't. At 10%, Azelaic Acid is a working concentration. The skin pilling, dryness, and sensitivity some users experience with too much product too fast are documented. Starting at 1-2 drops twice a week is the correct first step, not a conservative suggestion.

💪 Linh's Note: Non-comedogenic - means the formula has been tested and shown not to block pores or contribute to comedone (blackhead/whitehead) formation. For oily and acne-prone skin, this is a relevant tested claim rather than a general assurance.

Also Worth Considering: Obagi Hydrate Facial Moisturizer

For Skin That Deals With Both Oiliness and Sensitivity: Most high-efficacy blemish serums are formulated for resistant skin that can tolerate actives without support. This one is designed for the opposite combination: effective active at 10%, supported by a calming complex, in a watery texture that sits lightly. The two concerns are addressed in one formula rather than requiring two separate steps.

Oily and sensitive at the same time. Most formulas pick one to address. This one is built for the combination. Start slow, follow the protocol, don't skip the moisturiser after. That's the whole thing. 💪