Description

Based on the search results, here are options for a Vitamin C serum for dull skin that comes in larger or combo packs (approx. 90 ml total) along with their descriptions:

1. Foxtale Vitamin C Serum 15% L-Ascorbic Acid (90 ml – 30ml x 3 Pack) 
Description: A potent brightening serum designed to reveal brighter skin in just 5 days, specifically targeting dullness and uneven skin tone.
Key Ingredients: 15% Pure Vitamin C (L-Ascorbic Acid) for brightness, 1% Vitamin E for antioxidant protection and deep moisture.
Benefits: Reduces dark spots and pigmentation, boosts collagen production, and helps improve skin texture.
Best For: All skin types, including sensitive and acne-prone skin.
Texture: Lightweight, non-oily, and non-sticky. 
2. Nature Republic Vitapair C Dark Spot Serum (90ml – 45ml x 2 Pack)
Description: A high-concentration Korean serum containing 79.9% Jeju Green Lemon extract and Vitamin C, designed to target dark spots, freckles, and dullness.
Key Ingredients: 79.9% Green Lemon Extract, Niacinamide, Centella Asiatica, and Vitamin C.
Benefits: Brightens dull skin, provides intensive antioxidant care, and calms irritation.
Best For: All skin types, especially those looking to treat pigmentation and uneven skin tone.
Texture: Gel-type serum that absorbs quickly without stickiness. 

3. ELIBLISS Brightening Face Serum with Vitamin C (90 ml) 
Description: A repairing and skin tone-correcting serum intended for daily use to enhance radiance and combat dullness.
Key Ingredients: High concentration of Vitamin C and antioxidants.
Benefits: Targets pigmentation, reduces dark spots, boosts collagen for firmness, and hydrates.
Best For: All skin types seeking a brighter, more youthful complexion. 

Key Benefits of Using Vitamin C Serum for Dull Skin
Instant Radiance: Fades dullness, revealing a radiant, “lit-from-within” glow.
Fades Dark Spots: Inhibits melanin production, reducing hyperpigmentation and acne marks.
Collagen Boost: Stimulates collagen production for firmer, smoother skin.
Environmental Protection: Acts as an antioxidant, protecting against free radicals caused by sun exposure and
How to Use for Best Results
Cleanse: Start with a brightening face wash.
Apply: Take a few drops of the serum and apply it gently to your face and neck.
Sunscreen: Always follow up with a broad-spectrum SPF 30+ during the day, as Vitamin C works best when paired with sun protection.
Consistency: Use daily (AM & PM) to see visible improvement in dullness over time.