Lactic Acid 10% + HA 2%
The Ordinary's Lactic Acid 10% + HA is an alpha hydroxy acid (AHA) solution that delivers effective, targeted exfoliation at the skin's surface. It's backed by purified Tasmanian peppercorn extract, which has been shown to reduce irritation and sensitivity that can be associated with acid use. It helps even out skin tone and improve texture and dullness.
This water-based lactic acid serum is ideal for dry skin . The pH of this formula is approximately 3.8. Lactic acid has a pKa of 3.8, and pKa is the most important aspect to consider when formulating with acids (pKa refers to the amount of acid).
When the pKa is close to pH, there is an ideal balance between salt and acidity, maximizing the effectiveness of the acid and reducing irritation.