PCA Skin Hyaluronic Acid Boosting Serum hydrates on three levels and amplifies the skin's own hyaluronic acid by 50% within 24 hours. Beyond surface moisture, the serum stimulates the skin to produce more of its own HA, which is why its results build over weeks rather than fading by afternoon.
What Is the Hyaluronic Acid Boosting Serum?
The Hyaluronic Acid Boosting Serum is PCA's flagship hydration treatment, PCA's best-selling product worldwide. Most HA serums sit on the skin's surface and hydrate until they evaporate. This one works differently: it hydrates at the surface, penetrates deeper with a smaller HA molecule, and stimulates the skin's own long-term HA production. As natural HA declines from the mid-twenties onward, a serum that rebuilds it addresses the cause of dehydration, not just the symptom.
How Three Levels of Hyaluronic Acid Work
The serum treats hydration at three depths at once. At the surface, high molecular weight hyaluronic acid and sodium hyaluronate hold water and reduce moisture loss. Deeper, hydrolyzed hyaluronic acid, a smaller molecule, penetrates into the epidermis and dermis to plump from below. Underlying both, the proprietary HA-Pro Complex stimulates the skin to produce its own hyaluronic acid, ceramides, and glycosaminoglycans. Surface serums deliver one level of action; this delivers three.
Clinical Results
PCA tested the serum on 40 women aged 35 to 65 across Fitzpatrick types I to VI, applied twice daily for six weeks. The study found a 134% increase in immediate hydration after a single use, a 55% increase in overall hydration, a 60% improvement in skin plumping, and a 31% improvement in fine lines over the six weeks. Separately, the serum amplified the skin's own HA levels by 50% within 24 hours. Every patient showed visible hydration improvement after one use.
What Is in the Serum?
The formula pairs multiple forms of HA with barrier-supporting actives.
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Sodium hyaluronate and high molecular weight HA hydrate the surface and hold water
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Hydrolyzed hyaluronic acid penetrates deeper to plump fine lines from below
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HA-Pro Complex stimulates the skin's own HA, ceramide, and glycosaminoglycan production
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Niacinamide strengthens the barrier and supports even tone
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Ceramides (NP, AP, EOP) and phytosphingosine reinforce the moisture barrier
The serum contains trace aromatic components and is not fragrance-free.
Who It Is For
Choose the Hyaluronic Acid Boosting Serum if your skin is dry or dehydrated, if fine lines have started to show, or if you want hydration that builds over time rather than fading through the day. It suits all skin types and all Fitzpatrick tones, and works from preventative use in younger skin to corrective use in mature skin.
Look at a richer cream alongside it if your skin is very dry, since this is a treatment serum that layers under moisturiser. The Serums range covers complementary treatments.
How to Use the HA Boosting Serum
Apply to cleansed skin across the face and neck, morning and evening. Follow with a moisturiser to seal it, and SPF in the morning. For deeper penetration, PCA's study paired it with a vitamin C antioxidant treatment underneath. Twice-daily use is what produced the six-week results.
Where It Sits in the Routine
Cleanse, tone, treat with the HA Boosting Serum, then moisturise and protect. As a hydrating treatment, it goes on after any corrective serums and before heavier creams. Pair it with a moisturizer from the Moisturizers range to lock in the hydration it delivers.
FAQs
How does the PCA Hyaluronic Acid Boosting Serum work?
The serum hydrates on three levels. Surface HA holds water, hydrolyzed HA penetrates deeper to plump fine lines, and the HA-Pro Complex stimulates the skin's own HA production. In a 6-week clinical study of 40 patients, it increased overall hydration by 55% and improved fine lines by 31%, with results building over time.
How long does the HA Boosting Serum take to work?
The serum hydrates immediately, with a 134% increase in hydration measured after a single use in PCA's study. Longer-term results build over six weeks of twice-daily use: a 55% hydration increase, 60% better plumping, and 31% improvement in fine lines. Consistent morning and evening application produces the fuller effect.
Is the HA Boosting Serum suitable for all skin types?
The serum suits all skin types and all Fitzpatrick tones, tested across types I to VI. It works for dehydrated skin needing moisture, mature skin showing fine lines, and younger skin as prevention. It contains trace aromatics, so patch test first if your skin reacts to fragrance.
