Licorice Root vs. Kojic Acid: Which One Fades Dark Spots Better?

Brightening ingredients tend to get lumped together as if they all work the same way. These two actually take pretty different approaches, and knowing the difference changes which one makes sense for you.

Licorice root does two jobs at once

Licorice root contains a compound called glabridin, which blocks the enzyme responsible for making new pigment. It also contains liquiritin, which helps break apart pigment that’s already sitting in your skin and move it along faster.

That combination, blocking new pigment while nudging along the old, is part of why licorice root has a reputation as one of the gentler, more well-rounded brightening ingredients.

Kojic acid focuses on one mechanism, hard

Kojic acid works by binding to copper, which the pigment-making enzyme in your skin needs to function. No copper available, less pigment produced. It’s a narrower approach than licorice root’s two-pronged action, but it can be more intense in effect.

That intensity cuts both ways. It’s part of why kojic acid tends to work a little faster on stubborn spots, and also why it has a real reputation for causing irritation, especially at higher concentrations.

The gentleness gap matters here

If you’ve had a reaction to a brightening product before, licorice root is the safer place to start. It’s genuinely one of the calmer options in this category, which is also why it shows up in products aimed at reactive or rosacea-prone skin.

Kojic acid asks more of your skin in exchange for potentially faster results.

Speed versus comfort, basically

People often notice kojic acid working on a specific spot within a month. Licorice root tends to take longer, usually eight to twelve weeks, since it’s working more gradually and through two separate pathways rather than one aggressive one.

If you need results fast and your skin tolerates actives well, kojic acid gets there quicker. If you’d rather not deal with irritation, licorice root is worth the wait.

Splitting the workload between them

Yes, and it’s a reasonable pairing since they’re not really competing for the same job. Licorice root as your daily, gentle option, kojic acid layered in a few times a week for a stronger push on a specific spot you’re targeting.

Just watch how your skin responds. Two brightening actives at once can add up to more irritation than either alone, even if neither is individually harsh.

Neither one carries a sun sensitivity risk

That’s a real practical plus for both, unlike retinol or exfoliating acids, which need extra caution around sunscreen and daytime use. You can use either licorice root or kojic acid morning or night without worrying about increased UV sensitivity, though sunscreen still matters for protecting whatever progress you’re making.

Watch for a plateau, not just a lack of results

Both ingredients tend to show their biggest visible change in the first couple of months, then slow down noticeably. That’s normal, not a sign either one has stopped working. If a spot has faded partway and stalled, that’s often just the ingredient reaching the edge of what it can do on its own, and it might be worth adding a second approach rather than assuming the first one failed.

Which one to trust more if you’ve been burned before

If a previous brightening product left your skin irritated or blotchy, licorice root is the safer restart. It rarely triggers the kind of reaction that makes things worse before they get better, which matters more than speed when your skin’s already had a rough time.

Frequently asked questions

Is licorice root safe during pregnancy? Topical use is generally considered lower risk than eating large amounts of licorice, which does have real systemic effects. Still, mentioning any active ingredient to your doctor during pregnancy is a reasonable habit.

Does kojic acid bleach skin the way hydroquinone does? No, it works more gradually and doesn’t carry the same bleaching effect, though overuse can still cause irritation that paradoxically leads to new dark marks.

How do I know if a licorice root product actually has enough active ingredient? Look for products listing glabridin or liquiritin specifically, rather than just “licorice extract” generically, since concentration and quality vary a lot between brands.

Can kojic acid be used long term? Some guidance suggests cycling it rather than using it indefinitely every day, especially at higher percentages, to reduce the cumulative irritation risk.

Where to actually find these

Formulations and concentrations vary widely for both. If you want to compare current licorice root and kojic acid brightening products side by side, browse licorice root and kojic acid serums on Amazon before choosing.

As an Amazon Associate, this site may earn from qualifying purchases made through links like the one above, at no extra cost to you.

Where this actually leaves you

Licorice root is the gentler, two-pronged option that takes its time. Kojic acid is the more intense specialist that can move faster but asks more of your skin along the way. Match the ingredient to how much irritation you’re willing to trade for speed.