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 material, long-term or laboratory tests. Our aim is to provide honest feedback to help you make a purchasing decision. For a detailed insight into our comprehensive evaluation process, which forms the basis of all our product reviews, please click here.

N1
D-Mannose Direct Sticks

The D-Mannose Direct Sticks from N1 made a good impression in our test. The product has a practical size for handy use. It is a coarse granulate to support the treatment of urinary tract infections and cystitis. When used regularly once or twice a day, the active ingredient is designed to adhere to E. coli bacteria and prevent the bacteria from adhering to the walls of the urinary tract. The product is convenient and easy to use, tastes like raspberry sherbet and can be taken without water. According to the manufacturer, its effectiveness has been clinically confirmed.

Advantages

✅ Powder with raspberry effervescent flavor
✅ Can be taken without water
✅ Clinically confirmed effectiveness
✅ Practical size

Disadvantages

❌ Missing perforation

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, no use of plastic100 points
Product labelingLabeling available100 points
Total100 points
Weighting: 10%
*The maximum score is 100 points
D-Mannose Direkt-Sticks Verpackung
D-Mannose Direct Sticks
Packaging

The D-Mannose Direct Sticks from N1 arrived for our test in a typical shipping carton. This was undamaged on arrival and could be easily opened by removing the adhesive strip. This type of packaging optimally protected the product from external influences. Product protection was therefore fully guaranteed and the D-Mannose Direct Sticks were delivered in perfect condition .
The packaging is also recyclable. In this respect, the product leaves a very good first impression.

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 & scope30 D-Mannose Direct Sticks incl. instructions for use100 points
Instructions for useWritten in German, easy to understand90 points
Contact informationCan be found on the box and the instructions for use, no customer hotline available70 points
Total87 points
Weighting: 10%
*The maximum score is 100 points

After unpacking, 30 D-Mannose Direct Sticks and the instructions for use are on the table. The instructions for use provide information on how to use the product. Various free e-books on the manufacturer’s various medical products can be downloaded via a QR code. Contact information can be found on the product packaging and in the instructions for use. However, there is no customer hotline or e-mail address. Overall, this is a well thought-out and customer-friendly way of sending a 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 good visual appearance100 points
ProcessingGood workmanship90 points
StabilityStable90 points
Sustainability of the productNo information on sustainability80 points
Total90 points
Weighting: 20%
*The maximum score is 100 points
D-Mannose Direkt-Sticks Unboxing
D-Mannose Direct Sticks
Unboxing

The D-Mannose granules are supplied in the form of direct sticks. The labeling is discreet and limited to the essentials. Everything that needs to be stated on a medical product is on the product. As with a medicinal product, the instructions for use are very detailed with general information, explanations of the product and the areas of application, the composition, warnings and possible side effects. There is no information on the sustainability of the product.

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*
IngestionOnce or twice a day for no longer than 30 days, taken without water100 points
ConsistencyCoarse granulate powder95 points
FlavorRaspberry effervescent powder, subjective90 points
Direct sticksPractical, pre-dosed, lack of perforation80 points
Total91 points
Weighting: 40%
*The maximum score is 100 points

The D-Mannose Direct Sticks from N1 are a medical product with the active ingredient D-Mannose. It is a coarse granulate to support the treatment of urinary tract infections and cystitis. To achieve the greatest possible success, the product should be taken once or twice a day, depending on the type of treatment (preventive or supportive). The granules are already pre-dosed and can be taken easily without water. The direct stick is not perforated, but can still be opened easily. The product has a slightly artificial raspberry flavor, which we found pleasant. However, this certainly depends on the subjective perception of taste.
The company takes customer service very seriously and is happy to answer any questions about the productor treatment.
In order to obtain a meaningful result about the success of the treatment, the test must be carried out over a longer period of time. According to the manufacturer, the effectiveness has been clinically confirmed: “D Mannose is a natural component of the human metabolism. D mannose attaches itself to the bacteria that cause cystitis and prevents the bacteria from sticking to the walls of the urinary tract. The bacteria can then be easily excreted from the body during urination.”

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 ratioAppropriate70 points
Rating cut4.2 out of 5.0 on Amazon60 points
Total65 points
Weighting: 20%
*The maximum score is 100 points

On the Amazon platform, consumers have given the product an average rating of 4.2 stars. One criticism is that the taste is acrid, sour or even unnatural. Other reviewers, however, are not bothered by the taste. All reviews unanimously confirm the stated effect. In our practical test, we were able to confirm that the taste is reminiscent of raspberry sherbet and is therefore more a subjective matter of taste for the customer. The manufacturer offers a trial pack of 2 sticks for individual testing before long-term use.

Prices of up to €43 are charged on the Internet for equivalent products. Very inexpensive products, on the other hand, are available for as little as €8. The D-Mannose Direct Sticks from N1 are therefore in the middle price segment with a current price of €24.90. Consequently, the price ratio is reasonable for the quality and scope of services that you receive.

Overall result

WeightingScore achieved*
1. packaging & labeling10%100 points
2. package contents & instructions10%87 points
3. product processing & appearance20%90 points
4. in the practical test40%91 points
5. price/performance & consumer ratings20%65 points
Total86 points
*The maximum score is 100 points
D-Mannose Direct Sticks
of the brand
N1
achieved
86
Points in our test and therefore passed. The test was carried out in the test period
04/23
and is stored in our database under the licence number
230309004
. 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 observation and do not include long-term or laboratory tests. The test ratings reflect the opinion of our experts and are based on careful analysis. We would like to emphasize that these evaluations do not claim to be exhaustive and reflect both subjective and objective impressions. The assessments 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 reputable and thorough testing process, which has been developed in a long and professional process in close cooperation with our experts.

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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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