Licorice Root for Skin: The Ayurvedic Brightener Backed by Science
Licorice Root — known in Ayurveda as Yashtimadhu (Glycyrrhiza glabra) — is one of classical Ayurveda's most versatile botanicals and one of the most evidence-backed natural brightening ingredients in modern dermatology. Its primary brightening compound, Glabridin, inhibits tyrosinase through a unique mechanism that makes it particularly valuable for Indian skin.
Licorice Root in Classical Ayurveda
Yashtimadhu is classified in Ayurveda as:
- Varnya — complexion-brightening; one of the ten classical Varnya Gana herbs used for skin tone restoration
- Pittashamaka — Pitta-cooling; reduces heat-driven inflammation that causes pigmentation
- Rasayana — rejuvenating; supports tissue quality and longevity
- Madhura (sweet taste) and Sheetala (cooling potency) — the Ayurvedic explanation for its soothing, anti-inflammatory character
Classical Ayurvedic texts describe Yashtimadhu as appropriate for all skin types, with particular value for Pitta-dominant skin prone to redness, pigmentation, and UV sensitivity — a description that fits Indian skin's Fitzpatrick IV-V profile precisely.
How Licorice Root Brightens Skin: The Glabridin Mechanism
Licorice root's primary brightening compound is Glabridin — an isoflavane that inhibits tyrosinase through a mechanism distinct from both Vitamin C and Kojic Acid:
- Glabridin inhibits tyrosinase at a different site from Vitamin C (which inhibits the DOPA oxidase activity of tyrosinase)
- Glabridin also has documented anti-inflammatory action that reduces UV-induced pigmentation by suppressing the inflammatory signalling that triggers melanin production
- These dual mechanisms — direct tyrosinase inhibition + anti-inflammatory — make Glabridin particularly effective for PIH (post-inflammatory hyperpigmentation), where inflammation is the primary driver
Additional Licorice Root Bioactives
- Liquiritin — causes melanin dispersal in existing pigmented areas, accelerating the fading of established dark spots
- Glycyrrhizin — powerful anti-inflammatory with documented COX-2 inhibition; reduces redness and inflammatory skin conditions
- Isoliquiritigenin — antioxidant chalcone with UV-protective properties
The Evidence for Licorice Root
- A 2002 study confirmed topical Glabridin (0.5%) significantly reduced UV-induced hyperpigmentation in human skin over 4 weeks
- Multiple studies confirm Liquiritin's melanin-dispersing action reduces existing pigmentation in 4-8 weeks
- Licorice root extract is one of the best-tolerated brightening ingredients available — significantly less irritating than Kojic Acid with comparable brightening efficacy
- Combination studies show Licorice + Niacinamide produces synergistic brightening by addressing production, dispersal, and transfer of melanin simultaneously
Why Licorice Root Suits Indian Skin Particularly Well
- PIH-specific mechanism — Glabridin's anti-inflammatory + tyrosinase inhibition targets the inflammation-melanin pathway most relevant to Indian skin's PIH tendency
- Very low irritation — significantly lower sensitisation risk than Kojic Acid; appropriate for daily use and sensitive skin types
- Pitta-cooling Ayurvedic character — the anti-inflammatory dimension addresses the Pitta aggravation that drives pigmentation in Indian skin's climatic context
- Soothing on reactive skin — Glycyrrhizin's anti-inflammatory properties reduce redness alongside brightening
Licorice Root in Your Routine
Licorice root extract is compatible with most other brightening actives and can be used morning and/or evening. It is found in Velleja's formulations as a supporting Varnya botanical alongside proven modern actives.
Routine for PIH and Pigmentation:
- Morning: Vitamin C → SPF
- Evening: TXA + Niacinamide serum — TXA Peptides Serum (contains Licorice extract in the Varnya base)
- Face oil: Kumkumadi Face Oil (Yashtimadhu is one of the 16 classical Varnya herbs in the Kumkumadi formula)
Frequently Asked Questions
Is Licorice Root the same as Licorice candy?
Same plant source, different compound. Licorice candy uses Glycyrrhizin for sweetness. Skincare licorice root extracts contain Glabridin and Liquiritin for their brightening and anti-inflammatory properties. The flavour compound and the skincare-active compounds are different.
Can Licorice Root cause sensitivity?
Very rarely. Licorice root is one of the most well-tolerated botanical brightening ingredients available — significantly safer in this regard than Kojic Acid. Patch test if you have a known sensitivity to Glycyrrhiza species.
What is the difference between Licorice Root and Alpha Arbutin for brightening?
Different mechanisms. Alpha Arbutin inhibits tyrosinase and melanosome maturation (two steps in melanin production). Licorice root (Glabridin) inhibits tyrosinase through a different binding site AND disperses existing melanin via Liquiritin. Combining them addresses complementary brightening pathways.
Explore Velleja's Brightening Range →
Note: This article is for skincare education only.