One of skincare's most established antioxidants — but the formulation matters as much as the name of the ingredient.
What is it?
Vitamin C is an antioxidant found naturally in the skin. Skincare mainly uses L-ascorbic acid and various vitamin C derivatives.
What can it help with?
Topical vitamin C can contribute to a more even skin tone, reduce visible hyperpigmentation and support collagen synthesis. It is mainly used as part of skincare against photoaging and oxidative stress.
What does the research say?
Clinical studies and systematic reviews show improvements in pigmentation and some signs of photoaging. At the same time, results depend on formulation, concentration, stability and how well vitamin C actually penetrates the skin.
How to use it
Vitamin C is often used in the morning after cleansing and before moisturiser and sunscreen. L-ascorbic acid can be irritating for sensitive skin, so start gradually if your skin reacts easily.
What can it be combined with?
Vitamin C works well with sunscreen and can be combined with vitamin E and ferulic acid in stable formulations. It can also be used together with niacinamide and other common skincare ingredients.
Who should be cautious?
Sensitive skin may react to acidic L-ascorbic acid formulations. Discolouration or clear oxidation of the product may indicate that the formulation has become less stable.
GlowOver40 Take
Vitamin C is not hype — but not all vitamin C products are equal. Formulation, stability and packaging play a big role in how useful the product actually is.
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