March 22, 2023
What makes glycolic acid such a popular skincare ingredient?
Did you know that glycolic acid has several skin renewing benefits and can work in conjuction with your other skin care products?
We'll explain the skin benefits of glycolic acid, and why it's a great ingredient for reducing acne scars, and acne.
Glycolic acid is a well-known AHA and chemical exfoliant. Glycolic acid can combat active acne breakouts and reduce acne scarring - mainly when it is in the form of hyperpigmentation or discoloration.
Professional treatments with high concentration glycolic acid may reduce atrophic acne scars too which are the indented acne scars.
Glycolic acid is known for its exfoliating ability to loosen the 'glue' that holds the skin’s cells together. This allows for the uppermost layer of skin to shed faster, leading to a brighter, more even toned skin underneath.
According to Loretta Ciraldo, a board certified dermatologist, glycolic acid has been known to be the most popular and widely studied type of alpha hydroxy acid. It is derived from sugar cane and belongs to the alpha hydroxy acid family, along with lactic and malic acids. This type of acid can easily penetrate into the skin due to the very small sized molecule.
Because glycolic acid molecules are so small, it makes it an ideal ingredient to penetrate deep inside the pores of skin to break down excess sebum.
Glycolic acid works by exfoliating skin, by shedding the uppermost layer of skin, fresh new skin can be pushed to the skin surface faster. This reduces the appearance of hyperpigmentation, and fine lines.
Glycolic acid also has anti inflammatory properties due to its ability to inhibit p. acnes bacteria on the skin. This makes glycolic acid ideal for acne prone skin.
Glycolic acid has also been shown to be able to stimulate collagen production in skin when adjusted to a pH of 4. This leads to smoother appearing skin that can help with acne scars.
Glycolic acid can usually be found in products formulated for weekly use, but more gentle daily use concentrations can be found too.
Glycolic acid can also be supportive of the skin barrier too! It causes the skin to create more glycosaminoglycans which bind water to the skin. A healthy skin barrier can help reduce acne breakouts.
High strength glycolic acid peels can also reduce atrophic acne scarring.
Here’s how you can use glycolic acid in your skincare routine!
Glycolic acid can be used as long as the skin can tolerate it, and most people are able to tolerate glycolic acid, but be careful of some side effects and limitation.
The higher the concentration of glycolic acid, the more irritation it can potentially cause.
Main side effects can include: redness, burning, itching and irritation.
When using glycolic acid, make sure to use sunscreen daily during the day since it can cause sun sensitivity.
Those with pigmented skin could have a reaction where there is an increase in hyperpigmentation when using high strength peels, so it's best to consult with a dermatologist who understands and treats pigmented skin.
Those with very sensitive skin or with rosacea may find glycolic acid to be too irritating, however they may tolerate a low concentration of it.
Overall, glycolic acid is a safe and super star ingredient when used in OTC ( Over the counter ) skincare!
Chemical Peels for Acne and Acne Scars In Asians: Evidence Based Review: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3560163/
2. International Journal Of Dermatology: Biweekly serial glycolic acid peels vs. long-term daily use of topical low-strength glycolic acid in the treatment of atrophic acne scars
3. Glycolic acid adjusted to pH 4 stimulates collagen production and epidermal renewal without affecting levels of proinflammatory TNF‐alpha in human skin explants. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7891644/
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