Glabridin Powerful Skin Brightening & Anti-Inflammatory Licorice Extract Active

1. Description

Glucyrrhizin is a natural skin-lightening agent isolated from licorice flavonoids, which are extracted from the rhizomes of specific licorice plant varieties (such as Ural licorice, swollen-fruit licorice, and smooth-fruit licorice). It is completely natural, pollution-free, and has no side effects on the human body. At room temperature, it appears as a reddish-brown powder that is insoluble in water but readily soluble in organic solvents such as ethanol, propylene glycol, and 1,3-butanediol. Glycyrrhiza glabra is a perennial herb native to southern Europe, Asia, and the Mediterranean region, and is widely cultivated in Russia, Spain, Iran, and India. Glycyrrhiza glabra (as listed on Chemicalbook) possesses expectorant, emollient, anti-inflammatory, anti-filtrating pathogen, anti-hepatotoxic, and antibacterial properties. Due to these therapeutic effects, licorice has been extensively studied in both medical and food applications. Licorice is used in cosmetics for its skin-brightening, anti-inflammatory, antibacterial, and antioxidant properties, making it a highly valuable cosmetic ingredient. Glycyrrhizin, due to its highly effective ability to inhibit reactive oxygen species and melanin production, is hailed as the “gold of skin brightening.” This title reflects both its efficacy in skin brightening and the fact that the price per gram of glycyrrhizin is comparable to that of gold, leading only a few brands to dare to use it as a skin-brightening ingredient.

2. Application

(1) Skin Whitening and Skincare: As a highly effective skin-whitening ingredient, it is added to skincare products such as serums, creams, lotions, and face masks to inhibit melanin production, brighten skin tone, and fade dark spots. Its skin-whitening efficacy surpasses that of the common whitening agent arbutin, earning it the reputation as the “gold standard of skin whitening.”

(2) Anti-inflammatory Research: Used in studies on inflammatory conditions such as ulcerative colitis and atopic dermatitis. Studies have shown that oral administration of glucyrrhizin inhibits the NF-κB signaling pathway and alleviates inflammatory responses in the colon.

(3) Research on Metabolic Disorders: It is being studied for conditions such as obesity and diabetes. By activating the PPARγ (EC50 = 6115 nM) and AMPK signaling pathways, it regulates glucose and lipid metabolism, exhibiting hypoglycemic and anti-obesity effects.

(4) Neuroprotective Research: Used in studies on neurological disorders such as Alzheimer’s disease and cognitive impairment. Glucyrrhizin improves learning and memory abilities and protects neurons.

(5) Cardiovascular Protective Research: Used in studies on cardiovascular diseases such as atherosclerosis. It exerts cardiovascular protective effects by inhibiting LDL oxidation and through anti-inflammatory actions.

(6) Antitumor Research: Used in studies on various tumor cell lines, including breast cancer and liver cancer. It induces tumor cell apoptosis by activating caspase-3/8/9, inducing PARP cleavage, and activating the MAPK signaling pathway.

(7) Antimicrobial Research: Used in antimicrobial studies targeting pathogens such as Helicobacter pylori and Staphylococcus aureus.

3. Main Efficacy

(1) Skin-lightening and melanin inhibition: By inhibiting tyrosinase activity, it blocks the melanin synthesis pathway. Studies have shown that glucyrrhizin binds to the active site of tyrosinase to inhibit melanin production; its mechanism of action involves the regulation of the PKA/MITF and MAPK/MITF signaling pathways.

(2) Antioxidant Effects: As a potent free radical scavenger, it protects low-density lipoprotein from oxidative damage while activating the endogenous antioxidant defense system.

(3) Anti-inflammatory Effects: By inhibiting the activation of the NF-κB signaling pathway, it reduces the production of pro-inflammatory cytokines such as tumor necrosis factor-α, interleukin-1β, and interleukin-6. In a mouse model of colitis, a dose of 50 mg/kg significantly alleviated the inflammatory response.

(4) Antitumor activity: Exerts antitumor effects in various tumor cell lines by inducing apoptosis (activation of caspase-3/8/9, PARP cleavage) and inhibiting cell proliferation (phosphorylation of ERK1/2, JNK1/2, and p38 MAPK).

(5) Neuroprotective Effects: Protects neurons through antioxidant and anti-inflammatory mechanisms, improving learning and memory abilities. Demonstrates cognitive improvement in animal models.

(6) Metabolic Regulation: Activates PPARγ and AMPK signaling pathways, improving glucose and lipid metabolism, and lowering blood glucose and lipid levels. Possesses anti-obesity and anti-diabetic potential.

(7) Cardiovascular protection: Exerts anti-atherosclerotic effects by inhibiting LDL oxidation and inflammatory responses.

(8) Antimicrobial activity: Inhibits pathogenic bacteria such as Helicobacter pylori and Staphylococcus aureus.

(9) Skin protection: Protects against UV-induced photoaging through antioxidant and anti-inflammatory mechanisms.