Vitamin C is one of the most talked-about ingredients in skincare — but for all the noise around it, very few brands explain what it actually does, or why the form it comes in matters as much as the ingredient itself.
At Halo Skin, we believe you deserve to understand what you're putting on your skin. So here's a straightforward breakdown.
The Role of Vitamin C in Skin Health
Vitamin C — or ascorbic acid in its purest form — is a potent antioxidant. Its primary function is to neutralise free radicals: unstable molecules caused by UV exposure, pollution, and everyday environmental stress that break down collagen and accelerate visible ageing.
Beyond its antioxidant role, Vitamin C is directly involved in the skin's natural collagen synthesis process. It supports the enzymes responsible for producing and stabilising collagen fibres — meaning with consistent use, it helps maintain skin's structural integrity over time.
It also works to inhibit melanin production, which is why it's widely used to address uneven skin tone, dark spots, and post-blemish marks.
Not All Vitamin C Is Created Equal
Here's where most brands gloss over the detail. Pure ascorbic acid (L-Ascorbic Acid) is highly effective, but it's notoriously unstable — it oxidises quickly on exposure to light and air, turning your serum orange and rendering it far less potent before it even reaches your skin.
We chose 3-O-Ethyl Ascorbic Acid for The Glow Serum for exactly this reason. It's a stabilised Vitamin C derivative that delivers the same brightening and antioxidant benefits as pure ascorbic acid — without the instability issues. It also penetrates the skin barrier more effectively, converting to active Vitamin C once absorbed.
The result is a formula that remains potent from the first drop to the last.
What to Expect With Consistent Use
Vitamin C isn't an overnight fix — but it is one of the most well-evidenced ingredients in skincare when used consistently. Over several weeks of daily use, most people notice:
- A more even, luminous complexion
- Reduced appearance of dark spots and post-blemish marks
- Skin that looks firmer and more radiant over time
- A natural-looking glow that doesn't require a filter
In The Glow Serum, we've paired 3-O-Ethyl Ascorbic Acid with Bakuchiol — a plant-derived ingredient that complements Vitamin C beautifully, supporting skin renewal without the irritation associated with retinol. Together, they form a brightening duo that works with your skin, not against it.
How to Use It
Apply The Glow Serum to clean, dry skin each morning before your moisturiser and SPF. A few drops is all you need. Consistency is what delivers results — treat it as a non-negotiable part of your routine rather than an occasional add-on.
If you're new to Vitamin C, there's no need to build up gradually with a stabilised derivative like ours. It's formulated to be gentle enough for daily use from day one.
The Bottom Line
Vitamin C is one of the few skincare ingredients with decades of research behind it. When you choose the right form — stable, bioavailable, and properly formulated — it earns its place as the cornerstone of any brightening routine.
That's the thinking behind The Glow Serum. Nothing overpromised. Just the right ingredients, done properly.
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