Does vitamin C help with hyperpigmentation and dark spots?

Shown to impede the production of melanin — the pigment that gives colour to the skin — vitamin C can also really help fade dark spots, and leave your skin looking considerably brighter and smoother. “Essentially, it’s a potent ingredient for pigmentation,” Dr Granite adds.

When should I use a vitamin C moisturiser?

“Think lightest to thickest when it comes to layering your skincare products,” Dr Nasir explains. So, in the mornings, begin by applying your usual morning cleanser and — if desired — a toner. Then follow up with your serum, followed by your vitamin C moisturiser, and finally your SPF.

Although they can definitely be applied at night, vitamin C moisturisers are typically designed for daytime use — as this is when you’re more likely to benefit from the antioxidant ingredient’s ability to protect against sun damage, and fend off free radicals. Vitamin C also shouldn’t be mixed with retinol, AHAs, and BHAs if you want to avoid sensitivity, irritation, and even peeling.

What should I look for when choosing a moisturiser with vitamin C?

“L-ascorbic acid is the most stable form of vitamin C, so look for L-ascorbic acid in concentrations varying between 10-20%. Start with a lower concentration initially and gradually build up a tolerance to avoid potential irritation,” says Dr Granite.

“Vitamin C is very sensitive to exposure to light and air, so is best packaged in dark bottles to maintain stability. Vitamin C also pairs well with other antioxidants such as vitamin E and niacinamide.”

Some moisturisers with vitamin C also include other high-grade skincare ingredients such as squalane, ferulic acid, aloe vera, hyaluronic acid, and others.

Who should avoid using a moisturiser with vitamin C?

While the topical application of vitamin C is recommended for most adults, people with sensitive skin are more at risk of common side effects like irritation and redness. To avoid this, be sure to start out with a lower concentration, and only use it only twice a week — before slowly building yourself up to daily application.