A high-concentration PHA exfoliating serum formulated to gently yet effectively resurface the skin, refine texture, minimize pores, and enhance luminosity — without the irritation associated with AHA or BHA exfoliants. TIRTIR's PHA 15% Serum harnesses polyhydroxy acid's unique moisture-binding properties alongside its exfoliating action, delivering a resurfacing treatment that is especially well-suited for sensitive, reactive, or compromised skin that struggles to tolerate conventional chemical exfoliants.

Key Benefits

• 15% PHA Gentle Exfoliation — Polyhydroxy acid (PHA) is a next-generation chemical exfoliant with a larger molecular size than AHA or BHA, meaning it penetrates the skin more slowly and superficially for a gentler, less irritating resurfacing effect — making 15% a high-efficacy concentration that remains well-tolerated by most skin types.
• Refines Texture & Minimizes Pores — By dissolving the bonds between dead skin cells and accelerating cell turnover, PHA visibly smooths rough, uneven skin texture and reduces the appearance of enlarged pores, revealing a refined and polished skin surface.
• Brightens & Evens Skin Tone — Regular exfoliation removes the accumulation of dull, dead surface cells that cause skin to look lackluster and uneven, restoring clarity, radiance, and a more uniform complexion over time.
• Hydrating Exfoliant — Unlike AHAs and BHAs, PHA is also a humectant that attracts and retains moisture in the skin during exfoliation, preventing the dryness and sensitivity that can accompany conventional exfoliating treatments.
• Suitable for Sensitive Skin — PHA's gentle, surface-level action makes this serum suitable for skin types that react to AHA or BHA, including sensitive, rosacea-prone, and post-procedure skin seeking resurfacing benefits without irritation risk.

How to Use

Apply to cleansed skin in the evening after toner, before moisturizer. Use 2–3 times per week initially and increase frequency as tolerated. Avoid using simultaneously with other exfoliants (AHA, BHA, retinol) on the same evening. Always apply SPF the following morning. Introduce gradually if new to chemical exfoliants.

Key Ingredients

• PHA (Polyhydroxy Acid) 15% — gentle exfoliation, cell turnover, and humectant hydration
• Gluconolactone — antioxidant and skin-conditioning PHA compound
• Hyaluronic Acid — deep hydration and moisture retention
• Niacinamide — brightening and barrier-strengthening

Product Details

• Volume: 30ml
• Skin Type: All skin types, especially sensitive and AHA/BHA-intolerant skin
• Brand: TIRTIR
• Origin: Korea