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.

R(h)ein Nutrition®
Vitamin C + Vitamin D + Zinc Immune System Ultra

Our health and well-being are always our priority. Therefore, the selection of suitable food supplements is of crucial importance. This is where R(h)ein Nutrition’s Vitamin C + Vitamin D + Zinc Immune System Ultra comes into play – a product characterized by its exceptional quality. They have been developed to stimulate and strengthen the immune system and provide energy. They are easy to swallow. Overall, the Vitamin C + Vitamin D + Zinc Immune System Ultra provide comprehensive support for health and well-being, making them a valuable addition to the diet.

Advantages

✅ Highly dosed and bioactive
✅ Comprehensive vitamin supply
✅ Only 1 capsule a day
✅ Manufactured in Germany

Disadvantages

❌ None

The first impression

Packaging and contents

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 guaranteed. Are the contents of the packaging complete and does the manufacturer make it as easy as possible for me to use the product straight away?

CriterionRemarkScore achieved*
Product protectionCarton is sturdy, product sufficiently protected100 points
Sustainability PackagingUnnecessary packaging waste has been avoided, the plastic film protects the product components90 points
Package contents & scope1 tin with 120 capsules100 points
Instructions for useWritten in German, easy to understand100 points
Total98 points
Weighting: 20%
*The maximum score is 100 points

The Vitamin C + Vitamin D + Zinc Immune System Ultra from R(h)ein Nutrition® was delivered in a standard shipping box along with other products ordered.
The box was intact and easy to open.
The vitamin capsules were sent in a capsule box.
The remaining space in the package was filled with crumpled paper. This type of packaging optimally protected the product from external influences. In this case, the product was fully protected and therefore in perfect condition.
The packaging is recyclable. Both the cardboard and the filling material are fully recyclable.
The Vitamin C + Vitamin D + Zinc Immune System Ultra from R(h)ein Nutrition® make a very good impression overall. The product is undamaged and the packaging is in very good condition.

The first time in your hand

Product processing and appearance

ℹ️ Before we start the practical test, we take a close look at the workmanship of the products. How high quality are the materials used? Are the look and feel satisfactory?

CriterionRemarkScore achieved*
Visual appearanceAttractive design, visual appearance is flawless.100 points
ProcessingNo defects present100 points
StabilityVery stable100 points
Sustainability of the productAction tree100 points
Total100 points
Weighting: 20%
*The maximum score is 100 points
The vitamin capsules are ready for the practical test.

The Vitamin C + Vitamin D + Zinc Immune System Ultra from R(h)ein Nutrition® are not only functional, but also visually appealing . The high quality of the workmanship is recognizable.

The stability of the tin with the capsules is also excellent. The tin is easy to handle and makes a stable and durable impression.

Another positive aspect is that the manufacturer has already planted over 100 trees in collaboration with Aktion Baum. This is a commendable contribution to environmental protection and demonstrates the company’s social commitment .

In addition, R(h)ein Nutrition® presents a selection of other nutritional supplements.

This is what our practical test showed

Does the manufacturer keep its advertising promises?

ℹ️ Our practical test has the highest relevance and therefore weighting. 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*
StorageKeep out of the reach of children, in a dry, cool and dark place.100 points
QualityPreservative-free, GMO-free and gluten-free100 points
FlavorCompletely tasteless100 points
DurabilityApprox. 2 years100 points
SizeEasy to swallow100 points
Total100 points
Weighting: 45%
*The maximum score is 100 points

The Vitamin C + Vitamin D + Zinc Immune System Ultra from R(h)ein Nutrition® provide all the vitamins you need for a healthy immune system. The composition is of the highest quality, without preservatives – but with high-quality zinc, vitamin C and vitamin D. This composition stimulates and strengthens the immune system and provides it with energy. The capsules are easy to swallow. In general, the product is an excellent addition to the diet.

Price/performance ratio

and ratings from consumers

ℹ️ Finally, we examine 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?

CriterionRemarkScore achieved*
Price / performance ratioGood performance in the lower price segment80 points
Rating cutNot rated, as there are still too few customer reviews.
Total80 points
Weighting: 15%
*The maximum score is 100 points

Prices of up to €24 are charged on the Internet for equivalent products. Very inexpensive products are available from as little as €9. The Vitamin C + Vitamin D + Zinc Immune System Ultra from R(h)ein Nutrition® is therefore currently in the lower price segment with a price of €12.95. For the quality and performance received, the price-performance ratio isvery good.

Overall result

WeightingScore achieved*
1. packaging & contents20%98 points
2. product processing & appearance20%100 points
3. in the practical test45%100 points
4. price/performance & consumer ratings15%80 points
Total97 points
*The maximum score is 100 points
Vitamin C + Vitamin D + Zinc Immune System Ultra
 of the brand 
R(h)ein Nutrition®
achieved
97
Points in our test and therefore passed. The test was carried out in the test period
12/23
and is stored in our database under the licence number
231013018
. 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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