About Us

Prüfengel offers authentic consumer tests in which real users share their experiences with products. Our tests are based on practical applications in everyday life and reflect the opinions of consumers. As we focus on consumer tests, we do not carry out any material, long-term or laboratory tests. The tests are carried out by 1-2 independent consumers over a period of 7-14 days. The exact test conditions can be viewed in the test plan of the respective test report – click here to go directly to the test plan.

Manufacturers provide the tested products free of charge. We charge a one-off test fee for carrying out the tests. In addition, manufacturers pay an annual licence fee for the use of the Prüfengel seal. We also receive a commission for linking to manufacturers’ websites. These remunerations have no influence on our test results or ratings.

We guarantee transparency and a fair evaluation. For a detailed insight into our comprehensive evaluation process, please click here.

Kinsky®
Organic Vitamin C Serum

The organic vitamin C serumvon Kinsky” makes a very good impression. The product is of a high quality and impresses with its simple and appealing design. The serum is a natural cosmetic product from Germany that ensures fresh and firm skin. It is applied morning and evening to a cleansed face, neck and décolleté. Three to four drops, which can be easily dispensed using the pipette, are gently massaged into the skin. It is a light serum that feels very pleasant on the skin. It does not leave a sticky film and is quickly absorbed. The organic vitamin C serum is made from natural ingredients and contains no fillers, fragrances or colorants. It is also free from mineral oil, microplastics, silicones and parabens. Its skin-friendly formulation makes it suitable for all skin types . Blemishes, spots and redness are reduced, wrinkles and age spots are diminished.

Advantages

✅ Natural cosmetics
✅ With aloe vera
✅ Suitable for all skin types
✅ Skin-friendly and gentle formula

Disadvantages

❌ No significant disadvantages

The first impression

Packaging and labeling

ℹ️ Here we take a closer look at packaging. Sustainability is becoming an increasingly important factor. In addition, adequate protection of the product must of course also be ensured.

CriterionRemarkScore achieved*
Product protectionCarton is sturdy, product sufficiently protected100 points
Sustainability PackagingNo unnecessary packaging waste was used, items were packed compactly90 points
Product labelingMarkings available100 points
MiscellaneousHigh-quality packaging, also suitable as a gift100 points
Total98 points
Weighting: 10%
*The maximum score is 100 points
Shipping carton with product protection

The organic vitamin C serum from “von Kinsky” R(h)ein Nutrition is delivered in a classic shipping box. The serum is packed in an additional cardboard box. To ensure that the product packaging is not damaged during transportation, plastic packaging has been inserted into the shipping carton.
This ensures that the product is fully protected and the vitamin C serum is in perfect condition.
It should be particularly emphasized that only recyclable, renewable materials (paper/cardboard) are used for the outer packaging (shipping carton and product packaging).

After unpacking

Package contents and instructions

ℹ️ Most people’s first impression after unpacking is immediately memorable. Are the contents of the package complete and does the manufacturer make it as easy as possible for me to use the product straight away?

CriterionRemarkScore achieved*
Package contents & scope50 ml Vitamin C serum100 points
Instructions for useWritten in German, easy to understand100 points
Contact informationThese can be found on the product packaging and on the product. Unfortunately, there is no support email or telephone number70 points
Total90 points
Weighting: 10%
*The maximum score is 100 points

The packaging contains the 50 ml organic vitamin C serum in a sustainable glass pipette bottle . The instructions for use can be found on the product packaging and on the product itself.
The manufacturer’s address is stated on the product packaging. Unfortunately, it was not possible to find a telephone number or a support e-mail address. However, these can be found on the manufacturer’s website . The ingredients of the serum are also listed on the product packaging.
Overall, this is a well thought-out and customer-friendly way of presenting and shipping the product.

The first time in your hand

Product processing and appearance

ℹ️ Before we start the practical test, we take a close look at the product processing. How high quality are the materials used? Is the look and feel satisfactory?

CriterionRemarkScore achieved*
Visual appearanceVery appealing design100 points
ProcessingVery high quality100 points
StabilityVery stable100 points
Sustainability of the productUse of natural ingredients and a glass pipette bottle100 points
Total100 points
Weighting: 20%
*The maximum score is 100 points
Organic Vitamin C Serum

The organic vitamin C serum from “von Kinsky” makes a very good visual impression in the test. In addition to the simple design, it has no processing defects and is of a high quality. The serum is supplied in a sustainable glass pipette bottle. The product label is also made of paper. In addition, the product is made from natural ingredients in Germany. The organic vitamin C serum has a shelf life of at least one year.

This is what our practical test showed

Does the manufacturer keep its advertising promises?

ℹ️ Our practical test is the most relevant and therefore the most important. Here, the product has to undergo a wide range of criteria and tests. We check the functions and product promises of the test article.

CriterionRemarkScore achieved*
Application3 to 4 drops in the morning and evening100 points
IngredientsNatural ingredients with vitamin C and aloe vera juice100 points
OdorIntrinsic odor90 points
EffectFor fresh and firm skin100 points
Total98 points
Weighting: 40%
*The maximum score is 100 points

We liked the organic vitamin C serum from “von Kinsky” very much in the test. The organic vitamin C serum is suitable for all skin types . It consists of natural ingredients and is free from fragrances, colorants and fillers. It is also free from silicones, parabens, microplastics and mineral oil. It contains organic aloe vera juice, which gives the skin a pleasant feeling of freshness . It is very easy to use: the serum can be applied morning and evening to a cleansed face, neck and décolleté. Three to four drops, which can be easily dispensed using the pipette , are gently massaged into the skin. It is a light serum that feels very pleasant on the skin. It does not leave a sticky film and is absorbed quickly. The smell of the serum is difficult to describe, but it didn’t bother us. The serum contains 5% pure vitamin C, which makes the skin glow and refines the skin texture . It reduces blemishes, spots and redness and reduces wrinkles and age spots. After drying the skin, the skincare routine can be continued. All in all, a very good product. It should be emphasized that other serums are available from the manufacturer.

Price/performance ratio

and ratings from consumers

ℹ️ Finally, we look at how the product compares to the competition. Can it keep up with the competition in terms of price and quality? Would we generally recommend buying it? We also examine consumer ratings and check whether the critical and positive reviews are actually justified.

CriterionRemarkScore achieved*
Price / performance ratioVery good90 points
Rating cutNot rated because not enough reviews available.
Total100 points
Weighting: 20%
*The maximum score is 100 points

Prices of up to €33.17 for 50 ml are charged on the Internet for equivalent products. Very inexpensive products are available from as little as €9.79 for 50 ml. The organic vitamin C serum from “von Kinsky” is currently in the middle price segment with a price of €17.99 for 50 ml. The price ratio is very good for the quality and range of services you receive.

Overall result

WeightingScore achieved*
1. packaging & labeling10%98 points
2. package contents & instructions10%90 points
3. product processing & appearance20%100 points
4. in the practical test40%98 points
5. price/performance & consumer ratings20%90 points
Total96 points
*The maximum score is 100 points
Organic Vitamin C Serum
 of the brand 
Kinsky®
achieved
96
Points in our test and therefore passed. The test was carried out in the test period
06/23
and is stored in our database under the licence number
230606010
. Further information on our test procedure can be found at www.pruefengel.de/testverfahren.

The practical tests are based on careful observations and do not include long-term or laboratory tests. The test judgements reflect the personal impressions and opinions of the testers who try out the products in everyday use. We would like to emphasise that these evaluations do not claim to be exhaustive and may reflect both subjective and objective impressions. The evaluations are made to the best of our knowledge and belief, without any liability being assumed for the accuracy or completeness of the test results. It is important to note that our tests are not based on legal requirements, medical effects or specific ingredients of the products. We rely on the advertising claims and information provided by the manufacturers, but use of the information is always at your own risk. Our efforts are aimed at ensuring a serious and thorough testing procedure, which has been developed in a long and professional process in close co-operation with our testers.

The practical tests are based on careful observations and do not include long-term or laboratory tests. The test judgements reflect the personal impressions and opinions of the testers who try out the products in everyday use. We would like to emphasise that these evaluations do not claim to be exhaustive and may reflect both subjective and objective impressions. The evaluations are made to the best of our knowledge and belief, without any liability being assumed for the accuracy or completeness of the test results. It is important to note that our tests are not based on legal requirements, medical effects or specific ingredients of the products. We rely on the advertising claims and information provided by the manufacturers, but use of the information is always at your own risk. Our efforts are aimed at ensuring a serious and thorough testing procedure, which has been developed in a long and professional process in close co-operation with our testers.

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Evaluation process

You can find a detailed insight into our evaluation process, which forms the basis for our product ratings, here:

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Our product evaluations are carried out exclusively through direct, on-site tests. This ensures a detailed and specific examination of the product properties. You can find more information about the test procedure here.

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