1. Identity Profile
- Common Name: Vitamin C
- INCI Name: Ascorbic Acid
- Source: Nature-identical (lab-refined, originally derived from citrus fruits or corn)
- Botanical Origin: Various (e.g., Citrus sinensis, Zea mays)
- Family: Rutaceae / Poaceae
- Extracted From: Synthesised from glucose via fermentation or chemical conversion
- Required Dosage: Typically 5–20% in skincare formulas
2. Properties
- Function: Antioxidant, skin-brightening, collagen support
- Specificities: Neutralises free radicals, fades pigmentation, promotes firmness
Key Specificities:
Ascorbic acid helps visibly brighten skin and fade hyperpigmentation by interfering with melanin production. It also supports collagen synthesis, making skin feel firmer and more resilient. A powerful antioxidant, it protects the skin from environmental damage but requires stable formulation to remain effective.
3. Safety Issues
- Method of Preservation: Sensitive to light, air, and heat — often paired with stabilisers or used in airless packaging
- Contraindications: May cause mild tingling or irritation, especially in high concentrations or sensitive skin
- Usage Precautions: Best used in the morning with SPF to enhance photoprotection and reduce oxidation risk
