なぜスキンケアにおけるツボクサは、現代の化粧品処方においてゴールドスタンダードと見なされているのでしょうか？

You see the word “CICA” everywhere. It is in recovery creams, soothing serums, and barrier-repair masks. But is it just a marketing trend? Far from it. As a manufacturer of active ingredients, I see the raw clinical data behind this plant every day. Centella Asiatica (CICA) is not just a trend; it is a multi-pathway powerhouse that addresses inflammation, collagen loss, and barrier damage simultaneously.

If you are a formulator, you need to understand that not all CICA is the same. The magic lies in the four key triterpenes: Asiaticoside, Madecassoside, Asiatic Acid, and Madecassic Acid.

The Molecular Powerhouse

Why do dermatologists and chemists love CICA? It’s because these molecules don’t just “soothe”—they actually signal the skin to behave differently.

• アジアチコシドとマデカッソシド： These are glycosides that stimulate fibroblasts. They regulate signaling pathways like ERK, AMPK, and mTOR. Essentially, they tell your skin cells to produce more collagen and elastin.
• Asiatic & Madecassic Acid: These are the “genins” or active forms. They are the heavy hitters for matrix remodeling and re-epithelialization. When your skin barrier is compromised, these acids help rebuild it from the inside out.

Standardized Extracts vs. Crude Powders

You cannot formulate with just any “centella powder.” Crude extracts often contain sugars, starches, and proteins that make your emulsions prone to microbial growth and instability.

We push for Titrated Extract of Centella Asiatica (TECA), which is a standardized, high-purity fraction. It typically consists of about 60% genins and 40% asiaticoside. This allows you to dose your active ingredients with surgical precision rather than guessing based on raw leaf concentration.

Formulation Realities

CICA works best in water-based formats—think serums, essences, and gel-creams. Because the actives are potent even at low dosages, you don’t need to overload your formula.

Pro-Formulation Tips:

1. 相乗効果： Pair CICA with humectants like glycerin or panthenol (Vitamin B5) for immediate soothing.
2. 障壁の修復： Combine it with ceramides or squalane to lock in the repair process.
3. 温度制御： Add your CICA extract during the cool-down phase, ideally below 40°C, to ensure the molecules remain intact and active.

Real-World Data

The clinical evidence is hard to ignore. Studies show that CICA-based products significantly reduce transepidermal water loss (TEWL) and improve skin density. In one study, subjects using a CICA-based product for 8 weeks showed a significant improvement in skin hydration and a 32% reduction in scar depth for atrophic acne scars. For mature skin, regular use for 3 months has been linked to a 19% increase in skin elasticity.

Why Modern Brands Choose CICA

It is the ultimate “calm and firm” ingredient. It defends against oxidative stress, pollution, and the harsh effects of modern urban life. It fits perfectly into “minimalist” skincare routines because one ingredient handles multiple concerns—soothing redness, boosting firmness, and repairing the barrier.

Stop chasing the newest, unproven synthetic. Use a standardized, high-purity CICA extract to deliver clinical-grade repair that your customers can actually feel.

References Consulted:

1. Centella asiatica in cosmetology, PMC – NIH (2013).
2. TECA (Titrated Extract of Centella Asiatica): New microcirculatory, biomolecular, and vascular application, PubMed (2012).
3. Centella asiatica for Cosmetic Formulation, Chemist Guide – Grand Ingredients (2024).
4. Preliminary formulation and physical evaluation of Centella asiatica-based lotion, BIO Web of Conferences (2025).
5. An ultimate guide on Centella asiatica extract, Seppic (2023).