Ferulic Acid Is a Great Tool in the Fight Against Free-Radical Damage

You might have heard of ferulic acid and have maybe even tried a certain cult-favorite product that contains it, but how much do you truly know about the skincare ingredient? There's a reason (actually, many different reasons) why Byrdie editors wax lyrical about ferulic acid, including its anti-aging properties so we turned to the experts to find out just what makes it so beloved by the masses and if it actually lives up to the hype.

Keep reading to find out everything you've ever wanted to know about ferulic acid and more.

What Is Ferulic Acid?

Ferulic acid, aka hydroxycinnamic acid, is a powerful antioxidant that neutralizes free-radical damage from pollution, ultraviolet light, or infrared radiation, all of which accelerate skin aging. It's found in the cell wall of plants like oats, brown rice, peanuts, and oranges, but Levin says you typically hear of it associated with apples. Naturally, ferulic acid is botanically derived, but it can be created in a lab for quality control, consistency, and consumer safety. It mostly comes in a liquid form and can be found in serums, but can also be in the form of cream when packaged in a pump.

Levin says ferulic acid, an antioxidant, doesn't repair the damage that's already been done, but it acts as a shield to protect against free-radical formation. As Nazarian explains it, "When something tries to damage your skin, it creates a certain molecule that in its active state will continue to damage and traumatize the skin around it. This will come in and shut it off. It neutralizes the molecules that are formed that if left alone will continue to damage tissue."

For optimal effectiveness, ferulic acid should come packaged in a dark or opaque bottle to protect it from light and should be stored in a cool area (i.e. not a steamy bathroom). Levin adds that ferulic acid serums tend to turn from their original golden orange color to a muddy brown over time, which signals that the serum has oxidized and is thus, not as effective. Though they're hard to find, she recommends shopping products that have vacuumed packaging (which dispense with a pump) when possible to prevent air from entering or escaping.

Benefits of Ferulic Acid for Skin

Ferulic acid works to stop all the damage that comes from extrinsic aging. It also does the following:

• Reduces the formation of fine lines and wrinkles: Ferulic acid protects the skin from pollution and radiation, which can lead to wrinkles.
• Reduces the potential for sagging skin: Free radicals can also cause a loss of firmness in the skin, and ferulic acid acts as a shield to protect the skin from that damage.
• Reduces inflammation: Oxidative damage can cause inflammation in the skin, which blocks pores and can lead to breakouts. Antioxidants like ferulic acid have anti-inflammatory properties.
• Reduces the formation of brown spots: Pollution and radiation cause an increase in pigmentary alteration—like sunspots—and ferulic acid works to shield the skin from that effect.
• Decreases uneven skin tone by redness: Pollution and radiation cause an increase in blood vessel formation in the skin (which leads to redness) and ferulic acid works to shield the skin.
• Minimize the dark spots from pimples: Nazarian says if you're using an antioxidant consistently, the anti-inflammatory properties can minimize the damage or aftereffects from a pimple, such as lingering dark spots.
• Reduce pigmentation related to melasma: Melasma is a complex chronic pigmentary condition where your melanocytes are reactive to sunlight and infrared radiation (heat). Levin says the only thing we have currently to protect against infrared radiation are antioxidants (such as ferulic acid).
• Boost the effects of vitamin C and vitamin E: When used in conjunction with other antioxidants, ferulic acid can potentiate them and make them more stable.

Side Effects of Ferulic Acid

Ferulic acid has no known side effects. However, Levin says sometimes antioxidant serums can be a little bit too activating for certain skin types. "Any antioxidant can cause possible irritation, so not all antioxidants are the right concoction for each skin type," says Levin, who has seen patients experience irritation and acne breakouts from using products that contain ferulic acid. But because ferulic acid is usually combined with other antioxidants and ingredients, it's difficult to determine the cause of a reaction. In other words, it could be due to a particular product rather than ferulic acid specifically. "Oftentimes you’re not getting ferulic acid by itself," Levin says. "Serums combine preservatives or fragrance, a known irritant for certain people."

If you have sensitive skin, rosacea, eczema, or are someone who always tends to have irritation, Nazarian suggests applying a little bit of the product on the side of your face behind your ear, and seeing how your skin reacts after a day. If you're noticing any irritation or other reaction, that product isn't for you.

How to Use It

For best results, apply two to three drops of a ferulic acid serum or cream to clean, dry skin every morning and use your fingers to lightly spread the product evenly over your face. Follow with your moisturizer and sunscreen.

While ferulic acid can be used twice a day, Nazarian recommends sticking with a once-a-day routine in the morning. "Sometimes you’ll see them as twice-a-day dosing because they feel like some of these things will help the repair mechanisms that happen while we sleep at night, but I shy away from that," she says. "Most of our damage is typically in the morning, and there are other things that work better in the evening while you’re repairing."

If you use exfoliating acids, do so at night and not at the same time as products meant to neutralize free-radical damage and are very delicate. "When you use certain acids like glycolic acid or salicylic acid, that can change the pH of your skin," Levin says. "So you don’t want to combine layers and layers of acids on your skin because they can alter the pH, which then changes the effectiveness of the antioxidant."