Wann und wie oft trägt man ein Vitamin-C-Serum auf?

When and how often should you apply a vitamin C serum?

von Katharina Marin

05 January 2026

When and how often should you apply a vitamin C serum?

Vitamin C is one of the most versatile active ingredients in facial care . It protects the skin from damaging environmental influences, counteracts a dull complexion, and supports key repair mechanisms.

But before we get into specific times or procedures, it is crucial to understand why the skin needs vitamin C – and when its use is truly beneficial.

We explain: What role vitamin C plays in skincare, when its use is particularly effective, and how often you should use it.

Why does skin need vitamin C?

Vitamin C is a powerful antioxidant – one of those substances that neutralize free radicals. Free radicals are constantly being produced: through UV radiation, environmental pollution, heat, stress, or completely natural metabolic processes. If they are not neutralized, they attack cells and skin structures, which in the long term leads to:

  • a pale, tired appearance,
  • Pigment spots,
  • weakened collagen structure
  • and premature skin aging

can lead to this.

Vitamin C acts as both a protective and repairing building block. It strengthens the skin against external influences, brightens uneven areas, supports collagen production, and overall ensures a visibly smoother complexion.

When Vitamin C is used effectively

Vitamin C is not an active ingredient that only works at specific times of day. What's far more important is understanding the skin conditions and circumstances under which it is most effective. Its use is particularly beneficial when:

1. If the skin looks dull or tired

Oxidative stress impairs the natural glow. Vitamin C restores radiance to the complexion and evens out minor imperfections.

2. At the first signs of pigment spots

Vitamin C inhibits excessive melanin production and can visibly reduce hyperpigmentation.

3. When the skin is exposed to a lot of environmental stress

City air, UV rays, screen light or temperature fluctuations increase the formation of free radicals – vitamin C counteracts this effect.

4. To support collagen formation

The body's own production of collagen decreases with age. Vitamin C stabilizes existing collagen and promotes its regeneration.

5. When the skin reacts sensitively to aggressive active ingredients

Vitamin C offers an effective yet gentle option, provided the formulation is skin-friendly.

In practice, many people opt for stable formulations with multiple vitamin C derivatives that are effective yet well-tolerated. Our Vitamin C 15% Booster Serum combines a high dose of vitamin C with a creamy, fast-absorbing texture. Such products are well-suited for reducing pigmentation spots, smoothing the complexion, and reliably boosting antioxidant levels.

How often should you use vitamin C?

Frequency is a key factor in determining the effect – because antioxidant protection does not last indefinitely. Therefore:

For most skin types:
→ Apply daily to maintain protection against free radicals and support visible results.

Here's more information on the right time to use vitamin C serum: Should it be applied in the morning or evening?

For sensitive skin:
→ Start with 2-3 applications per week and gradually increase.

Why daily use is beneficial:
– Free radicals are produced every day
– the antioxidant effect diminishes within hours
– Even brightening and collagen support require continuity.

Regularity is therefore more important than the exact time of day.

How to incorporate Vitamin C into a routine

Even though this is not about morning or evening preferences, the position in the care sequence plays a role:

Vitamin C should be part of your routine early on , right after cleansing.
– This is followed by moisturizing care.
Sunscreen prevents new pigment spots from forming and reduces oxidative stress.

In a minimalist routine, this might look something like this:

  1. cleaning
  2. Vitamin C product (e.g. our vitamin c 15% booster serum )
  3. Moisturizer
  4. sun protection (when used in the morning)

The focus here is not on a strict time of day, but on a sensible sequence that supports effectiveness.

For whom is vitamin C particularly beneficial?

✔ For anyone who wants a fresher, more even complexion
✔ For skin prone to pigmentation spots or a dull appearance
✔ for people who spend a lot of time outdoors or in urban environments
✔ for first fine lines or loss of strength
✔ Suitable for all skin types – provided the formulation is mild enough

Conclusion

Vitamin C is less dependent on a specific time of day than on the condition of the skin and the level of free radical damage . Whenever the skin needs protection, brightening, or support for collagen production, vitamin C is the appropriate active ingredient.
The crucial point is:

Why it is used: protection, balancing, brightening, structural improvement
When the skin needs it: during stress, pigmentation, dullness, environmental pollution
How often it is used: regularly, ideally daily

The benefits are primarily realized through continuous use and appropriate integration into your skincare routine.