Quick Comparison
| Centella Asiatica | Niacinamide | |
|---|---|---|
| Typical Concentration | Used in various forms: full extract, TECA (Titrated Extract of Centella Asiatica — a standardized blend of the four key actives), or individual compounds. Concentrations vary widely (0.1-5% of active compounds). Apply morning and/or night. Safe for daily use on all skin types. | Concentrations: 2-10%. 5% is the most studied concentration and provides the best balance of efficacy and tolerability. Higher concentrations (10%) are available but may cause irritation in sensitive skin without proportional benefit. Apply morning and/or night. |
| Application | Topical (serum, cream, toner, mask). TECA or pure centella extract preferred over whole plant extract for consistency. | Topical (serum, moisturizer, toner). Water-soluble. Stable in formulation. Compatible with most actives. |
| Research Papers | 10 papers | 10 papers |
| Categories |
Mechanism of Action
Centella Asiatica
The four key triterpenoid saponins—madecassoside, asiaticoside, madecassic acid, and asiatic acid—exert distinct but complementary mechanisms. Madecassoside and asiaticoside are anti-inflammatory: they inhibit NF-κB nuclear translocation and IκB kinase activity, reducing TNF-α, IL-6, and IL-1β production in keratinocytes and dermal cells. Madecassic acid and asiatic acid (the aglycone forms) stimulate type I and III collagen synthesis in fibroblasts by upregulating collagen gene expression and procollagen production. All four compounds promote wound healing by stimulating angiogenesis via VEGF (vascular endothelial growth factor) upregulation, fibroblast proliferation and migration, and extracellular matrix remodeling. Centella extracts also increase superoxide dismutase (SOD) and catalase activity in skin cells, enhancing endogenous antioxidant defense. The triterpenes may modulate TGF-β and Smad signaling. TECA (Titrated Extract of Centella Asiatica) standardizes these actives for consistent clinical efficacy.
Niacinamide
Niacinamide is converted to NAD+ via the Preiss-Handler pathway—essential for cellular respiration, DNA repair (PARP), and sirtuin regulation. In keratinocytes, it upregulates serine palmitoyltransferase and fatty acid elongases, increasing ceramide synthesis and strengthening the barrier. It inhibits melanosome transfer by downregulating protease-activated receptor-2 (PAR-2) on keratinocytes—brightening without tyrosinase inhibition. In sebocytes, it normalizes lipid synthesis and reduces sebum (possibly via AMPK). Niacinamide inhibits NF-kB translocation, suppressing IL-1beta, TNF-alpha, and IL-8. It inhibits phosphodiesterase, increasing cAMP and modulating keratinocyte differentiation. These multi-pathway effects explain broad efficacy across barrier repair, brightening, acne, and anti-aging.
Risks & Safety
Centella Asiatica
Common
Very well-tolerated. Occasionally mild tingling.
Serious
None documented.
Rare
Allergic contact dermatitis (uncommon). Purified extracts are less likely to cause reactions than crude extracts.
Niacinamide
Common
Very well-tolerated at 2-5%. Flushing/redness at concentrations above 5% in some individuals.
Serious
None documented.
Rare
Contact dermatitis (uncommon). Old advice to avoid combining with vitamin C is largely debunked at product pH levels.
Full Profiles
Centella Asiatica →
Also known as Cica, Gotu Kola, or Tiger Grass, Centella Asiatica is an herb used in traditional medicine for wound healing that has become one of the most popular soothing ingredients in Korean and global skincare. Its active compounds (madecassoside, asiaticoside, madecassic acid, asiatic acid) reduce inflammation, stimulate collagen production, and accelerate wound healing. Essential for sensitive and compromised skin.
Niacinamide →
A true multitasker — niacinamide (vitamin B3) addresses almost every skin concern simultaneously. It strengthens the skin barrier by boosting ceramide production, reduces hyperpigmentation by inhibiting melanosome transfer, controls sebum production, minimizes pore appearance, reduces redness, and has anti-aging benefits. One of the most versatile and well-tolerated actives in skincare.