# TIRTIR PHA 15% Serum 30ml

Exfoliation, without the sting of a smaller-molecule acid.

- Brand: TIRTIR
- Product: PHA 15% Serum 30ml
- Price: $50.00
- Availability: In stock
- Size: 30 ml
- Market: Korean market, the version sold in Korea
- Made in: Republic of Korea
- EAN (barcode): 8809928135373
- Category: Serums & Ampoules

## Key benefits

- Gluconolactone (PHA), rather than a smaller-molecule AHA, for gentler exfoliation
- Squalane and Adenosine to offset stripping
- Bilberry, sugarcane and citrus fruit extracts in the base
- Built for exfoliation-sensitive skin starting out with acids
- Sold as TIRTIR's authentic Korean-market formula, the same version sold through Korean retail rather than a US-reformulated substitute

## How it works

Gluconolactone is a polyhydroxy acid, a gentler cousin of the AHA family that exfoliates with a larger molecule size than the smaller-molecule AHAs it does not contain, which is why PHA formulas are the usual starting point for exfoliation-sensitive skin. Squalane and Adenosine sit in the base to keep the exfoliating serum from feeling stripping, and a run of fruit and root extracts, including Vaccinium Myrtillus (bilberry), sugarcane and lemon, rounds out a formula built around gentle acid exfoliation rather than one active alone. It is meant to follow toner and precede a moisturizer, applied to skin that is still slightly damp so the actives have a receptive surface to absorb into. This particular listing is the 30ml size TIRTIR sells for the line, packaged and formulated for the Korean market rather than a separate US release.

## How to use

1. Apply to clean, dry skin at night, starting two to three times a week rather than daily until skin has adjusted. Follow with a moisturizer, and always use daytime sun protection separately since any acid exfoliant increases sun sensitivity.

## Ingredients

Water, Gluconolactone, C9-12 Alkane, Propanediol, Butylene Glycol, 1,2-Hexanediol, Tromethamine, Sodium Hydroxide, Sodium Citrate, Citric Acid, Ethylhexylglycerin, Vaccinium Myrtillus Fruit Extract, Adenosine, Disodium Edta, Saccharum Officinarum (Sugarcane) Extract, Squalane, Citrus Aurantium Dulcis (Orange) Fruit Extract, Citrus Limon (Lemon) Fruit Extract, Acer Saccharum (Sugar Maple) Extract, Dioscorea Japonica Root Extract, Tocopherol, Corchorus Olitorius Leaf Extract, Nelumbo Nucifera Root Extract, Hibiscus Esculentus Fruit Extract, Angelica Keiskei Extract, Capryloyl Salicylic Acid, Hippophae Rhamnoides Fruit Oil

## FAQ

### Is PHA gentler than a standard AHA exfoliant?

Yes. Rather than a smaller-molecule AHA, Gluconolactone's larger molecule size means it exfoliates the skin's surface more gradually, which is why PHA formulas are typically recommended for sensitive or acid-new skin.

### How often should I use this?

Start two to three nights a week and increase only if skin tolerates it well, the same introduction pace recommended for any new exfoliating acid. This is general guidance rather than a fixed rule, so adjust it based on how your own skin or the product itself responds.

### Do I need sunscreen when using this?

Yes, every day this is in the routine. Any exfoliating acid increases how easily skin sunburns, so daytime sun protection is a separate, necessary step. This is general guidance rather than a fixed rule, so adjust it based on how your own skin or the product itself responds.

### Is this the same formula sold in Korea, or a version made for the US market?

This is TIRTIR's Korean-market formula, sourced and shipped with its original Korean-market packaging and batch coding rather than a separate US-reformulated version. Korean Pharmacy stocks the exact SKU sold through Korean retail rather than a substitute built for US shelves, which is the point of buying from a specialist rather than a general beauty retailer.

### How should I store this to keep it in good condition?

Keep the cap or compact closed between uses and store it away from direct sunlight and heat, the same way you would any cosmetic. A cool, dry spot such as a drawer or cabinet keeps the texture and finish consistent for longer than leaving it exposed on a warm windowsill or in a hot car.

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Page: https://korean-pharmacy.com/products/tirtir-pha-15-serum-30ml