Anua PDRN Hyaluronic Acid Capsule 100 Serum

"Six Hours in a Dry Classroom Teaches You Exactly What Your Skin Is Missing. This Serum Is a Very Good Answer to That Question."

I'm Lily, an English teacher in Gangnam, and my skin runs dry in a very particular way: not dramatically, not in flakes or visible patches, just a steady tightening through the day that starts quietly and becomes impossible to ignore by mid-afternoon. Heated air indoors in Seoul does something specific to moisture. The classroom compounds it. By the time I get home in the evening, my skin is asking, politely but insistently, for something.

The ANUA PDRN Hyaluronic Acid Capsule 100 Serum was something I came across because of the ingredient, honestly. Salmon DNA. I had to read it twice. It sounded stranger than it turned out to be, and the formula behind it is more considered than the name might suggest.

This is a hydration serum built around a Triple Revitalizing Complex: PDRN (derived from salmon DNA), a 3% Hyaluronic Acid Complex using eleven forms of the ingredient, and Hydrolyzed Collagen. It comes out naturally tinted in a soft emerald green — no artificial colour — which is, I'll admit, one of the more beautiful things I've seen in a skincare bottle. The texture is watery and fast-absorbing. You can layer it two to three times at night, or blend a drop or two into your base makeup if you want that lit-from-within finish without a separate step.

For dry skin that simply needs sustained moisture and a little luminosity, the ingredient logic here is worth understanding properly.

What is PDRN, and why is salmon DNA in a face serum?

The ANUA PDRN Hyaluronic Acid Capsule 100 Serum contains PDRN, listed as Sodium DNA, derived from salmon DNA. PDRN (polydeoxyribonucleotide) is a polynucleotide compound with an established history in aesthetic medicine, and its application in topical skincare is a growing area of Korean cosmetic formulation. In this serum, it is included as part of the Triple Revitalizing Complex, designed to support skin repair and regeneration alongside the hyaluronic acid and collagen components. The natural emerald tint of the formula comes from the ingredients themselves, including the PDRN; no artificial colour is added.

🌿 Lily's Note: PDRN (Polydeoxyribonucleotide) - a polynucleotide ingredient derived from salmon sperm DNA. It has a well-documented history in injectable aesthetic treatments for skin repair and wound healing. In topical serums, it is used to support skin regeneration and barrier maintenance, though topical delivery works differently from injectable application. It is the same class of ingredient, at a different delivery depth. Polynucleotide - a chain of nucleotides, the building blocks of DNA and RNA. In skincare, polynucleotide compounds are studied for their role in supporting cellular repair processes and skin resilience.

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What does "11x Hyaluronic Acid Complex at 3%" actually mean for the skin?

The ANUA serum uses eleven forms of hyaluronic acid together at a combined 3% concentration. Different molecular weights of hyaluronic acid work at different depths — larger molecules sit at the surface and create an immediate plumping effect, while smaller molecules are designed to penetrate more deeply for sustained hydration. Using multiple forms simultaneously means the hydration is not just surface-level. For dry skin that tightens through the day regardless of morning moisturiser, a serum delivering moisture at several depths rather than one is the more useful construction. The 3% total concentration is a named, measurable quantity — not a trace amount.

🌿 Lily's Note: Hyaluronic Acid - a humectant that attracts and holds water in the skin. It occurs naturally in the body, particularly in connective tissue. In skincare, it is used in various molecular weights: higher-weight molecules stay at the surface for immediate smoothness, lower-weight molecules penetrate further for deeper hydration. An 11-form complex addresses the full depth range in a single application. Humectant - an ingredient that draws moisture from the environment or from deeper skin layers toward the surface. It works most effectively when sealed with a moisturiser, which prevents the drawn moisture from simply evaporating into dry air.

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Can the ANUA PDRN serum be used under makeup or blended into foundation?

Yes. The application directions specifically suggest blending one to two drops of the serum into foundation or base makeup to create a natural, lit-from-within finish. The lightweight, watery texture absorbs quickly without residue or stickiness, which means it layers cleanly under moisturiser and sunscreen in the morning without interfering with anything that goes over it. For days when you want your skin to look a little more luminous under makeup, the foundation-blending method is a simple way to use the serum's dewy finish without an additional step.

Is this serum suitable for sensitive skin?

The ANUA PDRN Hyaluronic Acid Capsule 100 Serum is fragrance-free, with no artificial fragrance or colour, and has passed a Primary Skin Irritation Test. The formula is lightweight, watery, and does not contain AHAs, retinol, or other exfoliating actives that would increase reactivity. Hyaluronic acid and Hydrolyzed Collagen are both well-tolerated ingredients with a strong safety profile across skin types. The presence of Adenosine and PDRN means this formula is more active than a basic hydration serum, and as with any new product, a patch test before full use is sensible — particularly for skin that reacts to new ingredients generally.

Does this help with fine lines, or is it primarily a hydration product?

It is primarily a hydration product that also includes anti-ageing-supportive ingredients. Adenosine is included specifically for wrinkle improvement, and PDRN and Hydrolyzed Collagen are both formulated to support skin repair and plumpness over time. The immediate perceivable effect is dewy, plumped hydration, and fine line appearance can improve as a secondary result of sustained moisture and the formula's collagen and PDRN activity. For targeted anti-ageing treatment, this serum is a supportive foundation — it addresses the hydration component that often underlies the appearance of fine lines, particularly on dry skin, while the longer-term repair support works gradually over weeks of consistent use.

How do you layer this serum — can it actually be used multiple times in one application?

Yes. The product guidance specifically suggests layering two to three times at night for a smoother, more refreshed skin feel. In the morning routine, it goes after toner and before moisturiser and sunscreen. In the evening, it can be layered on its own two to three times as an intensive moisture step before a heavier night cream. The watery texture absorbs quickly enough that successive layers do not feel heavy or sticky. It layers cleanly with other serums — applied before thicker formulas, as the thinnest step in a sequence.

Worth Knowing

Triple Revitalizing Complex: PDRN, 11x Hyaluronic Acid at 3%, and Hydrolyzed Collagen work together as the formula's core. Three different mechanisms — polynucleotide repair support, multilevel moisture delivery, and collagen-supportive plumping. The combination is designed for hydration that reads as more than just surface moisture.

Microcapsule Delivery Technology: The formula uses microcapsule technology to help active ingredients penetrate and deliver effectively. This is the design basis for the "Capsule 100" name — it is not just a textural claim but a stated delivery mechanism for the active ingredient stack.

Natural Emerald Tint: The serum's colour comes from the formula's own ingredients, with no artificial colour added. It applies clearly and does not tint the skin. For anyone who notices this in the bottle and wonders whether it will affect their routine — it will not. It is one of those small formulation decisions that signals careful ingredient sourcing.

Adenosine for Fine Lines: Adenosine is included as a named wrinkle-improvement ingredient alongside the hydration actives. This serum is not marketed primarily as an anti-ageing product, but the presence of Adenosine means skin repair support is built into the formula, not added as a footnote. Results from Adenosine are gradual and build with consistent use over several weeks.

🌿 Lily's Note: Adenosine - a naturally occurring compound in the body that plays a role in cellular energy and repair processes. In cosmetic formulations, it is used for its wrinkle-smoothing and firming properties. It is one of the few anti-ageing ingredients that has a reasonably well-established evidence base in topical skincare, without the irritation profile of retinol.

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Layering This Many Actives: The ingredient list in this serum is longer than a single-active formula. Niacinamide, Glutathione, Adenosine, PDRN, and 11 forms of hyaluronic acid are all present. The formula is designed to deliver this complexity in a single lightweight step, and the fragrance-free, irritation-tested formulation reduces the risk of the multiple actives compounding each other's reactivity. That said, if you are already using a dense active routine, introducing this serum alongside everything else at once is less sensible than adding it as a single new step and observing how the skin responds.

Small Bottle, Deliberate Format: At 1.01 fl.oz / 30ml, this is a concentrated serum in a small bottle. The 2-3 nightly layering guideline means it is used with some generosity, and the bottle will not last as long as a larger format. That is worth knowing before purchase if you are committing to nightly layering as your primary use pattern.

There is something quietly satisfying about a serum that does exactly what dry skin needs at the end of a long day, without announcing itself.

The 3% hyaluronic acid, the natural green in the bottle, the skin that feels like itself again by morning. That is enough. 🌿