Vitamin C serums have a reputation problem — they sting, oxidise quickly, and often feel like you're applying something that hates your skin. The Jumiso All Day Vitamin Pure C 5.5 Glow Serum was formulated to fix all of that, and it largely succeeds.

The formula uses pure L-Ascorbic Acid at 5.5% — the most potent, research-backed form of Vitamin C — held at a mildly acidic pH of 3.95 that maximises effectiveness without triggering the stinging and heating sensations most people associate with Vitamin C serums. The stabilising secret is Aronia Melanocarpa (Black Chokeberry) Fruit Extract, which leads the ingredient list — it's one of the most antioxidant-rich berries in existence and has been shown to reduce the sensitivity and irritation typically associated with pure Ascorbic Acid, while also helping to maintain stability so the formula doesn't oxidise as quickly. Ascorbyl Glucoside provides a second, gentler form of Vitamin C to extend the brightening effect. Alpha-Arbutin works alongside to inhibit melanin production and fade existing dark spots, while Ferulic Acid — a well-established antioxidant booster — amplifies the Vitamin C's potency and provides additional free radical protection. Tocopherol (Vitamin E) rounds it out, strengthening the skin barrier and preventing moisture loss.

Clinically shown to fade dark spots by 30% in two weeks. Fragrance-free, essential oil-free, and paraben-free.

Sul Skin note: One of the most accessible Vitamin C serums on the market — the Aronia technology makes it genuinely tolerable for skin that's previously found Vitamin C too irritating. Store in the fridge and use within three months of opening.