Quick Comparison
| Niacinamide | Propolis | |
|---|---|---|
| Typical Concentration | 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. | Concentrations vary widely (10-80% extract). Products like COSRX Propolis line use high concentrations. Apply after cleansing. Can be used morning and night. Patch test first — bee product allergies are possible. |
| Application | Topical (serum, moisturizer, toner). Water-soluble. Stable in formulation. Compatible with most actives. | Topical (serum, essence, ampoule, cream). Available in many K-beauty products. |
| Research Papers | 10 papers | 10 papers |
| Categories |
Mechanism of Action
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.
Propolis
CAPE (caffeic acid phenethyl ester) inhibits NF-kappa B nuclear translocation by preventing I-kappa B alpha degradation and blocking p65/p50 nuclear import — suppresses TNF-alpha, IL-1beta, IL-6, COX-2 transcription. Flavonoids (chrysin, pinocembrin, galangin) provide antioxidant protection through free radical scavenging and metal chelation. Bacteriostatic and bactericidal against Cutibacterium acnes and Staphylococcus aureus via cell wall disruption and protein synthesis inhibition. Promotes wound healing: stimulates fibroblast collagen I/III synthesis, keratinocyte migration (integrins, matrix metalloproteinases), angiogenesis. Inhibits hyaluronidase, preserving skin hyaluronic acid. Effective for acne (reduces inflammation, bacterial load) and sensitive skin (calming barrier disruption).
Risks & Safety
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.
Propolis
Common
Sticky texture.
Serious
Allergic reaction in people with bee/honey allergies (important to patch test).
Rare
Contact dermatitis.
Full Profiles
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.
Propolis →
A resinous substance produced by honeybees from tree buds, used to seal and protect the hive. Propolis contains over 300 bioactive compounds including flavonoids, phenolic acids, and caffeic acid phenethyl ester (CAPE). In skincare, it provides potent anti-inflammatory, antimicrobial, and wound-healing effects. Popular in Korean skincare for acne-prone and sensitive skin.