The Ordinary Glycolic Acid 7% Exfoliating Toner
240 mL
$15.28
This pH of this formula is approximately 3.6. Glycolic Acid has a pKa of 3.6 and pKa is the most important aspect to consider in formulating with acids. pKa implies acid availability. When pKa is close to pH, there is an ideal balance between salt and acidity, maximizing effectiveness of the acid and reducing irritation. Higher pH numbers in such a case would increase salt which counter-intuitively would make the formula even more irritating than if the formula was more acidic.
Directions of Use: Use ideally in the PM, no more frequently than once per day. After cleaning, saturate a cotton pad with the formula and sweep across face and neck. Avoid the eye contour and contact with eyes. Do not rinse off. Continue with additional skin treatments as needed. If persistent irritation occurs, discontinue use and consult a physician.
- Copper Peptides
- Peptides
- Other direct acids
- EUK 134
- 100% Niacinamide Powder
Highlights
- We are only able to ship this item to Canadian customers.