Vitamin C is a star ingredient in many skin care products, known for its antioxidant, lightening and anti-ageing properties. However, not all combinations of ingredients are suitable when using vitamin C. To get the best results without compromising the health of your skin, it's important to know which ingredients not to mix it with.
Do not mix vitamin C with retinol-containing products.
- ReasonRetinol and vitamin C are highly active ingredients that can cause skin irritation and dryness when combined. Both work to accelerate cell turnover, which can overload the skin.
- AlternativeIf you wish to use both, it is best to apply one in the morning (as vitamin C) and the other in the evening (as retinol), allowing time between the two.
2. Avoid mixing with AHA/BHA acids (such as glycolic or salicylic acid).
- ReasonExfoliating acids such as glycolic or salicylic acid can reduce the effectiveness of vitamin C. In addition, combining them may increase the risk of irritation, redness or sensitivity, especially for sensitive skin.
- AlternativeUse acid peels on different days than when you use vitamin C or in the evening to avoid direct interaction.
3. Do not combine vitamin C with products containing benzoyl peroxide.
- ReasonBenzoyl peroxide, commonly found in acne products, can oxidise vitamin C, neutralising its effectiveness. It can also be overly aggressive when combined with ascorbic acid (vitamin C).
- AlternativeIf you are treating acne with benzoyl peroxide, consider using vitamin C in the morning and benzoyl peroxide at night.
4. Avoid mixing with ingredients containing metals (such as copper).
- ReasonCopper in some cosmetic products can interfere with the stability of vitamin C, causing it to lose its efficacy.
- AlternativeBe sure to apply copper products at different times or on a different routine to avoid interaction.
5. Do not combine vitamin C with products containing drying alcohols.
- ReasonAlcohols in some products can dry the skin and, when used with vitamin C, can cause irritation. Vitamin C is an active ingredient that can sensitise the skin, and drying alcohols can worsen this effect.
- AlternativeOpt for alcohol-free vitamin C formulas to prevent skin dehydration.
Vitamin C is a highly beneficial ingredient, but to get the most out of its properties, it is important to understand how to combine it correctly with other ingredients. Avoiding mixing it with retinol, exfoliating acids, benzoyl peroxide and other active ingredients will help maintain healthy skin and maximise the effectiveness of your skincare routine.
Additional adviceIf you are ever in doubt about how to combine products, it is always a good idea to do a patch test and consult a dermatologist if you have sensitive skin or specific conditions.
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