What is it for:

Glycolic Acid is an AHA (Alpha Hydroxy Acid) that provides chemical exfoliation to help improve radiance and encourage smoother, softer skin. It can penetrate deeper into the skin than the other AHA to stimulate collagen production.

When to use:

PM - Best used 2-3 times per week.

Active ingredient benefits:

Radiance-boosting

Exfoliation helps to remove dead skin cells on the top layers of the skin to prevent dullness.

Chemical Exfoliator

Glycolic Acid exfoliates the skin to tackle a build-up of dead skin cells in pores which can lead to blemishes.

Collagen-boosting 

It has the smallest molecular size of all the AHAs, meaning it can penetrate deeper into the skin to stimulate collagen production.

Ingredient origin:

Synthetic, but naturally occurs in sugar cane.

Works well with:        

Niacinamide/ Hyaluronic Acid

DOESN'T WORK WELL WITH:

Retinol.

Time to see results:

It can take between 3-4 weeks to see results from Glycolic Acid, but this can vary from person to person.

Impact on sun sensitivity:

AHAs, like Glycolic Acid, can increase the skin's sensitivity to UV rays, therefore it's important to apply SPF daily and limit sun exposure when using this ingredient.