VITAMIN C
BENEFITS
Antioxidant Protection – Neutralizes free radicals caused by UV rays and pollution.
Brightening – Reduces dullness and gives skin a natural glow.
Fades Hyperpigmentation – Helps lighten dark spots, acne marks, melasma, and sun spots.
Collagen Boost – Stimulates collagen production (reduces fine lines & wrinkles).
UV Damage Repair – Does not replace sunscreen, but reduces oxidative stress after sun exposure.
Even Skin Tone – Minimizes redness and blotchiness.
Wound Healing Support – Enhances skin repair.
SIDE EFFECTS
Mild Irritation: Stinging, redness, or dryness (especially at higher concentrations).
Purging or Breakouts: Sometimes occurs in sensitive or acne-prone skin.
Oxidation Issues: Vitamin C is unstable; oxidized product can irritate and lose effectiveness.
Incompatibility: May cause irritation when layered incorrectly (e.g., with AHAs/BHAs, retinoids in beginners).
CONCENTRATION
Low (5–10%) → Gentle, good for sensitive skin, provides antioxidant.
Medium (10–20%) → Best balance between results & tolerance; effective for pigmentation and collagen boost.
High (>20%) → Not always more effective; often causes more irritation without added benefit.
👉 Sweet spot: 10–20% L-Ascorbic Acid (most studied form).
EFFECTIVENESS
Best for prevention + correction of skin concerns.
Works well with most ingredients (unlike actives that can be unstable).
Especially effective when paired with hyaluronic acid, ceramides, and SPF.
HOW TO USE
Cleanse → Use a gentle face wash.
Tone (optional) → If using toner, apply before Vitamin C.
Apply Vitamin C → 2–3 drops, gently pat into skin.
Moisturize → Locks in hydration.
SPF in Morning → Always protect skin to maximize results.
Frequency:
AM or PM (or both)
Daily use is safe for most skin types.
JUSTIFICATION
Multi-functional: Targets multiple concerns in one product.
Gentle: Less irritation risk compared to acids or retinoids.
Compatible: Works with most skincare ingredients.
Suitable year-round: No photosensitivity like some actives
QUALITY
Form:
L-Ascorbic Acid (LAA) → most effective, but unstable.
Derivatives (MAP, SAP, EAA, THD, etc.) → more stable, gentler, but slightly less potent.
Packaging: Dark glass bottle / airless pump.
pH: For LAA → works best at pH 2.5–3.5.
Freshness: Should be clear to slightly pale yellow. If dark orange/brown → oxidized → discard.
SKIN TYPES
✅ Normal to Oily Skin → Best with L-Ascorbic Acid (10–20%).
✅ Sensitive Skin → Better with derivatives (Magnesium Ascorbyl Phosphate, Sodium Ascorbyl Phosphate, or THD Ascorbate) at lower strengths.
✅ Dry Skin → Use a serum with hydrating base (with hyaluronic acid, glycerin).
✅ Pigmented Skin → Higher strength LAA (15–20%) or derivative blends.