Yes, you can use ferulic acid with glycolic acid. Both of these ingredients have their own unique benefits for the skin and can be used together in a skincare routine.

Ferulic acid is a powerful antioxidant that helps to neutralize free radicals, protect the skin from environmental damage, and improve the stability and efficacy of other antioxidants. It also has anti-inflammatory properties and can help to brighten the skin and reduce the appearance of dark spots.

Glycolic acid, on the other hand, is an alpha hydroxy acid (AHA) that exfoliates the skin by breaking down the bonds between dead skin cells. It helps to improve skin texture, reduce the appearance of fine lines and wrinkles, and promote a more even skin tone.

When using these two ingredients together, it's important to consider their concentrations and formulations. Start by using products with lower concentrations of both ferulic acid and glycolic acid to minimize the risk of irritation. You can also consider using them on alternate days to allow your skin to adjust.

As always, it's a good idea to patch test new products and consult with a dermatologist or skincare professional if you have any concerns or specific skin conditions.