If you are looking for vitamin C products for the skin, you will find countless products on the Internet. Unfortunately, it is not obvious to end consumers that some products have an inadequate effect and therefore hardly any effect at all. If you then decide on a product and only later find out about a better alternative, the frustration is great. In this buying guide, our editorial team from Apotheken-Warentest has compiled all the important criteria for assessing the products on the market and analyzed the test winner.

For years, vitamin C has been THE active ingredient that women around the world turn to when it comes to skin care. New studies have once again confirmed this: Vitamin C tightens the skin, can slow down skin ageing and increase resistance. It is said to reduce wrinkles by 40% after just a few weeks and make the skin smoother and softer. Vitamin C also provides antioxidants in the skin, protecting it from irritation, inflammation and environmental stress. Many users report enthusiastically: "I feel ten years younger!"

But caution is advised here too: There are also big differences in vitamin C serums! Scientists report that it depends on the composition and the method of application.

We uncover the biggest myths about vitamin C for you and show you what to look out for when buying. We have carried out independent research for you and selected the top 3 best vitamin C products. Our short guide will give you all the knowledge you need to never waste your money on worthless hyaluronic acid products again. So you can achieve maximum results.

Studies have long proven the effectiveness of vitamin C.

There are now many placebo-controlled studies that prove the visible effect of vitamin C. We present a small selection here:

1st Munich Study: Increased skin hydration and elasticity

A clinical study conducted by the Ludwig-Maximilians-University of Munich focused on the influence of creams containing a special vitamin C formula with a content of 1% including a mucilage active ingredient. The study observed 76 women and analyzed the elasticity and moisture content of the skin around the eye area. The results showed that the vitamin C serum used significantly increased skin hydration and elasticity compared to a placebo.

2. further Munich study: Reduced wrinkle depth after 3 months

In another clinical study with 20 participants, divided into four groups, different vitamin C products were tested for daily use. Wrinkle depth and skin firmness were measured before and after a 3-month application phase. The results showed that the depth of wrinkles was reduced by up to 20% after just 3 months and the skin was tightened by up to 30%.

3 University Hospital Basel: Slowing down the ageing process

A joint research project between the School of Medicine in Thessaloniki and the University Hospital Basel revealed back in 2012 that vitamin C in the form of a serum is able to slow down the ageing process.

As we have learned in the previous lines, vitamin C in serums has a good reputation in terms of its effect on the skin for justified and even scientifically confirmed reasons.

It can therefore be assumed that not only the best quality is used in the flood of vitamin C products.

To really benefit from the advantages of vitamin C, you should keep a few points in mind. You can read about these in the following section:

Criterion1: Serums are usually purer than creams and therefore the most effective

Criterion 2: The best results are achieved by channeling vitamin C deep into the skin

Criterion 3: Quality before quantity

We have analyzed dozens of scientific studies for you and tested the most promising products on this basis. Here we present the 3 best vitamin C serums and the test winner.

We have also based our assessment on the above criteria and included verified product reviews from female testers.

DULEXIR Vitamin C Serum 

The German pharmacy brand Dulexir has developed a unique formula that cannot be found anywhere else.

They have developed a new complex of active ingredients - the "Dulex Acid Complex" - which enables vitamin C to penetrate both superficially and deeply into the skin in order to have a real effect from the inside out. In this way, the blockages on the skin can be bypassed.

Mode of action: 2-stage effect - In the first stage, the skin is freed from its blockage and in the second stage it is then supplied with vitamin C in depth.

The customer reviews are consistently positive. Several customers report a refreshing effect on the skin, good skin tolerance and that the skin has visibly improved. 86.7% of customers give it 5 out of 5 stars.

One bottle contains 50 ml and costs from €33.30 - lasts for approx. 3 months.

Dr. Barbara Sturm

The Good Vitamin C Serum

The Good C Vitamin Serum by Dr. Barbara Sturm is a deep-acting vitamin C serum enriched with transport-promoting zinc for plumper skin. It reduces wrinkles and is suitable for all skin types.

It can be used as a make-up base and is suitable for the face, neck and décolleté. 

Price: from 140,00 € / 30 ml

KU2

Vitamin C serum 

This natural serum from KU2 Cosmetics is a simple, high-quality and versatile product with a concentrated amount of vitamin C. It helps to increase the skin's moisture and thus ensures more radiant skin.

The KU2 company is popular with beauty enthusiasts. Not least because all products have been developed in collaboration with cosmetic scientists. In addition, regular laboratory tests ensure that effectiveness and safety are guaranteed. The only drawback: although the product appears to be of high quality overall, we have found that some users report a rather sticky consistency. It often takes longer to fully absorb into the skin than comparable products.

Price: 65€ / 100 ml

Quellen / Sources:

(1) Signorini, Massimo, et al. "Global aesthetics consensus: avoidance and management of complications from hyaluronic acid fillers-evidence-and opinion-based review and consensus recommendations." Plastic and reconstructive surgery 137.6 (2016): 961.

(2) Boen, Monica, et al. "A Prospective Double-blind, Placebo-controlled Clinical Trial Evaluating the Efficacy of a Novel Combination of Hyaluronic Acid Serum and Antioxidant Cream for Rejuvenation of the Aging Neck." The Journal of Clinical and Aesthetic Dermatology 13.11 (2020): 13.

(3) https://www.dulexir.com/pages/testergebnis

(4) https://www.dulexir.com/pages/bewertungen

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