Vitamin C, or ascorbic acid, is one of the most researched active ingredients in dermatology and cosmetology. Known for its antioxidant and brightening properties, it plays a key role in facial care – regardless of skin type. Regular use of a vitamin C serum or cream can significantly improve skin condition, support its regeneration, and protect against oxidative stress.
Ascorbic acid participates in the synthesis of collagen, the skin's primary structural protein. This contributes to its firmness, elasticity, and smoothness. Additionally, as a powerful antioxidant, it neutralizes free radicals produced by UV radiation, environmental pollutants, and stress. Vitamin C also has a brightening effect—it inhibits the activity of the tyrosinase enzyme, reducing melanin production and reducing the appearance of discoloration (Pullar et al., 2017).
Clinical studies have shown that ascorbic acid at a concentration of 10–20% significantly improves skin tone and texture and reduces the appearance of fine lines and wrinkles (Farris, 2005). Importantly, vitamin C works best in a stable formula, at the proper pH, and in the presence of synergistic ingredients such as vitamin E and ferulic acid.
Serums are the most concentrated form of cosmetics, and thanks to their light consistency, they absorb quickly and reach the deeper layers of the epidermis. When choosing a vitamin C serum, it's worth paying attention not only to the concentration but also to the chemical form of the vitamin and the presence of stabilizing substances.
The serum should also contain antioxidants that support the action of vitamin C. One example of a well-balanced formula is Nasze vitamin C serum – containing 15% L-ascorbic acid combined with vitamin E and ferulic acid. This trio of ingredients works synergistically, increasing the serum's stability and strengthening protection against the harmful effects of UVA and UVB radiation. This product is ideal as a morning skincare step – applied under sunscreen – supporting antioxidant protection throughout the day.
Check What does vitamin C serum do for your face? i which vitamin C serum is the best
While serums are the most effective way to deliver vitamin C, many face creams also contain this ingredient in lower concentrations. Vitamin C creams provide better hydration and occlusion, making them an excellent choice for those with dry or dehydrated skin. Using them can support skin regeneration at night and protect it during the day—especially if they also contain UV filters or other antioxidants.
The best vitamin C face creams combine it with other active ingredients: niacinamide, ceramides, squalane, and hyaluronic acid. Such combinations increase comfort of use and minimize the risk of irritation, while strengthening the epidermal barrier. Read also are ceramides better than retinol and check What does retinol serum help with?.
The use of vitamin C in skincare isn't limited to mature skin. Products containing it can provide effective support for many skin types and conditions. It's most often used by people with signs of photoaging, but its benefits are also appreciated by younger individuals struggling with dull, tired complexions and minor discolorations.
Read also What should the daily care of mature skin look like?.
Vitamin C rarely works alone – its effectiveness can be significantly enhanced by combining it with other substances. One of the most commonly used combinations is vitamin C and vitamin E (tocopherol). Together, they create a powerful antioxidant complex that protects cell membranes and DNA from oxidative stress. The addition of ferulic acid not only stabilizes vitamin C but also enhances its photoprotective properties. Combining vitamin C with hyaluronic acid enhances the skin's moisturizing and smoothing effects – particularly important when caring for dehydrated and lacking elasticity skin.
Vitamin C and niacinamide are also becoming increasingly popular combinations. These ingredients were once thought to cancel each other out, but modern research (Lin and Selim, 2005) shows that they can be safely used together, especially in layered products. They work in tandem: vitamin C brightens discolorations and provides antioxidant protection, while niacinamide strengthens the epidermal barrier and has anti-inflammatory properties.
Check What does niacinamide serum help with? i what is the best niacinamide serum
Vitamin C isn't just for mature skin or skin with discoloration. Its uses in facial care products are much broader. Regular use of a serum or cream containing this ingredient can help with:
Premium cosmetics with vitamin C are often the first choice for preventative care – for those who want to delay the signs of aging without resorting to aggressive treatments. Vitamin C also regulates the activity of sebaceous glands and reduces the tendency to breakouts in men, as men's skin naturally produces more sebum.
Using cosmetics with vitamin C is particularly important in the context of interprocedural care – the period between aesthetic medicine appointments. This is when the skin needs support in regeneration, protection from free radicals, and strengthening of its natural barrier functions. A vitamin C serum, applied daily in the morning under sunscreen, can prolong and enhance the effects of treatments such as mesotherapy, chemical peels, and laser therapy.
Yes. Vitamin C serum can be used every morning, under cream and UV protection. Check what are the best sunscreens.
No, but high concentrations (15–20%) may cause irritation in people with sensitive skin. It's best to start with a lower concentration and observe your skin's reaction.
The first results (skin brightening, improved firmness) are visible after approximately 3–4 weeks of regular use.
Yes – it inhibits melanin production and accelerates the breakdown of existing pigmentation spots. Read more how to treat discoloration or how to remove discoloration.
Best stored in a cool, dark place—out of direct sunlight and air. Products in dark bottles with pumps minimize oxidation.
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