Quick Comparison
| Green Tea Extract (EGCG) | Madecassoside | |
|---|---|---|
| Typical Concentration | Topical: 1-5% green tea extract in formulations. Look for products with EGCG specifically listed. Oral: 400-800 mg green tea extract (standardized to EGCG) daily. Apply topical products before sunscreen for additional photoprotection. | Concentrations: 0.01-1% as an isolated compound. Products with pure madecassoside are common in K-beauty and French pharmacy brands (La Roche-Posay Cicaplast). Apply morning and night. Excellent as a recovery treatment post-retinoid or post-procedure. |
| Application | Topical (serum, cream, toner) or oral (supplement, tea). Topical is effective for localized skin benefits. | Topical (serum, cream, balm). Apply to clean skin. Compatible with all active ingredients. |
| Research Papers | 9 papers | 10 papers |
| Categories |
Mechanism of Action
Green Tea Extract (EGCG)
EGCG scavenges ROS (superoxide, hydroxyl radical, peroxynitrite) and chelates iron/copper that catalyze Fenton reactions. Inhibits MMP-2 (gelatinase A) and MMP-9 (gelatinase B) that degrade collagen types I, III, IV and elastin in photoaged skin — these enzymes are UV-upregulated via AP-1 and NF-kappa B. Reduces sebum by inhibiting 5-alpha reductase type 1 (testosterone to DHT conversion in sebaceous glands). Anti-inflammatory: NF-kappa B inhibition (I-kappa B degradation prevention), COX-2 suppression, TNF-alpha/IL-1beta reduction. Promotes keratinocyte differentiation via involucrin and filaggrin upregulation. Catechol structure enables dual antioxidant and metal-chelating activity. Topical EGCG reduces UV-induced erythema and prevents collagen degradation when used before sun exposure.
Madecassoside
Madecassoside (triterpene glycoside from Centella asiatica) inhibits NF-kappa B nuclear translocation by preventing I-kappa B alpha degradation, suppressing transcription of pro-inflammatory cytokines (TNF-alpha, IL-1beta, IL-6) and COX-2. Activates Nrf2, upregulating antioxidant enzymes (heme oxygenase-1, NQO1, glutathione peroxidase). Stimulates collagen type I synthesis through TGF-beta/Smad3 signaling in fibroblasts, upregulating COL1A1. Promotes keratinocyte migration (wound closure) by enhancing integrin expression and matrix metalloproteinase activity. Inhibits hyaluronidase, preserving skin hyaluronic acid. Reduces VEGF expression, inhibits MMP-1. Comprehensive: anti-inflammatory, antioxidant, pro-collagen, wound-healing. Used in pharmaceutical wound care (Madecassol) and K-beauty. Ideal for post-procedure recovery, retinoid irritation, sensitive skin.
Risks & Safety
Green Tea Extract (EGCG)
Serious
None topically. Oral high-dose EGCG supplements have rare liver toxicity reports.
Rare
Contact dermatitis.
Madecassoside
Common
Essentially none — extremely well-tolerated.
Serious
None documented.
Rare
Very rare allergic reaction.
Full Profiles
Green Tea Extract (EGCG) →
Epigallocatechin gallate (EGCG) is the primary polyphenol in green tea and one of the most potent topical antioxidants. It has been shown to reduce UV damage, decrease sebum production, reduce inflammation, and inhibit the enzymes that break down collagen and elastin. Green tea extract is one of the few antioxidants with evidence for both topical and oral skin benefits.
Madecassoside →
A purified triterpene glycoside from Centella asiatica that is the primary anti-inflammatory and wound-healing compound in the 'cica' family. While Centella asiatica extracts contain a mix of four triterpenes, isolated madecassoside provides the most potent soothing and barrier-repair effects. It is particularly effective for post-procedure recovery, sensitive skin, and skin exposed to environmental stressors like pollution and UV.