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.

XARTHRO®
Joint tablets for dogs

XARTHRO joint tablets support your dog’s joint health with a carefully considered combination of native type II collagen and omega-3 fatty acids, which help promote mobility. The formula is supplemented by a variety of functional ingredients such as green-lipped mussel meat, seaweed, MSM, devil’s claw, glucosamine and chondroitin, which together provide holistic nutrition for the joints. The tablets are suitable for dogs of all breeds, are well tolerated, have a high acceptance rate and last up to three months for smaller dogs. XARTHRO is produced in Germany under strict quality standards, which speaks for its safety and effectiveness.

In tests, XARTHRO impressed with its very good acceptance, practical divisibility and pleasant size, even for smaller dogs. The effect on mobility and activity was noticeable. The low focus on sustainability and the product price were negative aspects.

  • Very good acceptance
  • Good size, even for small dogs
  • Easy to share
  • Little focus on sustainability

First impression

Packaging and contents

Here, the packaging is examined in more detail. Sustainability is becoming an increasingly important factor. In addition, adequate protection of the product must of course be ensured. Is the packaging complete and does the manufacturer make it as easy as possible for me to use the product straight away?

Here, the packaging is examined in more detail. Sustainability is becoming an increasingly important factor. In addition, adequate protection of the product must of course be ensured. Is the packaging complete and does the manufacturer make it as easy as possible for me to use the product straight away?

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Product protection

Cardboard is sturdy, product adequately protected

100

Points

Sustainability of packaging

No unnecessary packaging waste, plastic film protects the product components

90

Points

Package contents & scope

Complete

100

Points

Instructions

In German, written in an easy-to-understand manner

100

Points

TOTAL

98

Points

Weighting: 20%
*The maximum number of points is 100

XARTHRO® joint tablets for dogs impress with their sturdy and practical packaging. The cardboard box is robust and the plastic film effectively protects the product contents. The package contents are complete and meet expectations. The instructions for use are written in German and are easy to understand. XARTHRO® attaches great importance to functionality, which is reflected in the well-designed packaging and clear instructions for use.

Resealable packaging

First impressions

Product workmanship and appearance

Before putting the products to the practical test, we take a close look at how they are made. How high-quality are the materials used? Are the feel and appearance satisfactory?

Before putting the products to the practical test, we take a close look at how they are made. How high-quality are the materials used? Are the feel and appearance satisfactory?

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Visual appearance

Appealing tablet design

100

Points

Workmanship

Very good workmanship

100

Points

Stability/shape

Tablet shape easy to eat for small and large dogs

100

Points

Sustainability of the product

No information, but produced in Germany (short transport routes)

80

Points

OVERALL

95

Points

Weighting: 20%
*The maximum number of points is 100

Convenient shape

XARTHRO® joint tablets for dogs impress with their attractive tablet design and excellent workmanship. The visual appearance is appropriate, which strengthens consumer confidence. The tablets are optimally designed so that both small and large dogs can eat them without any problems. The stability and shape of the tablets underline the quality of the product and demonstrate careful manufacturing. No specific information is available on the sustainability of the product itself.

This is what our practical test revealed

Does the manufacturer deliver on its advertising promises?

Our practical test is the most relevant and therefore carries the highest weighting. Here, the product is subjected to a wide range of criteria and tests. We check the functions and product promises of the test item.

Our practical test has the highest relevance and therefore the highest weighting. Here, the product must undergo a wide range of criteria and tests. We check the functions and product promises of the test item.

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Health

No pesticides, very low lead content

100

Points

Tablet breakage resistance

The tablets show no signs of cracks or breakage, which is also due to the high dry matter content

90

Points

Acceptance by different dogs

Without exception, all dogs selected for the test took the tablets immediately and without any hesitation or reservations

100

Points

Tolerance

The dogs showed no signs of discomfort or behavioural changes after taking the tablets. Our laboratory tests have shown that the product does not contain any pesticides and only a very low level of lead.

100

Points

Tablet divisibility

Can be easily divided into two equal halves.

100

Points

OVERALL

98

Points

Weighting: 45%
*The maximum score is 100 points

As part of our testing of XARTHRO joint tablets, we examined their breakage resistance. The tablets showed no cracks or breaks, which is partly due to their high dry matter content. Dry matter describes the proportion of the mass without water. Our laboratory test showed that the dry matter content is 93.3 g per 100 g of tablets. The usual range of dry matter in food supplements is 85 g to 95 g per 100 g of tablet. This product therefore has a high dry matter content. A high dry matter value indicates a dense formulation with a low water content, which is typical for powders or tablets. In terms of acceptance, the product was completely convincing: all dogs tested accepted the tablets spontaneously and without hesitation. The product was also very well tolerated, with no signs of discomfort or behavioural changes. Laboratory tests have shown that the product does not contain any pesticides. Pesticide residues can be toxic and should be avoided in animal feed wherever possible (see European Food Safety Authority 2025). The fact that no pesticides are detectable is a strong indicator of quality (see European Food Safety Authority 2025). The value for lead measured in our laboratory is 0.14 mg/kg (equivalent to 0.132 mg/kg based on dry matter). The EU limit is 10 mg/kg. This means that the lead content is very low. Lead is a toxic heavy metal with no benefit for dogs (see European Union 2002, p. 15). The very low value shows that the product has been processed safely and to a high standard. The divisibility of the tablets was rated positively: they can be easily divided into two equal halves, which facilitates individual dosing and contributes to ease of use.


The joint tablets are of very good quality in terms of purity (no pesticides, extremely low lead content) and concentration (high dry matter content). The evaluation of the parameters examined indicates that this is a safe and well-processed feed supplement.

Literature sources:

European Food Safety Authority (2025). Pesticides. URL : https://www.efsa.europa.eu/de/topics/topic/pesticides [25.04.2025].

European Union (2002). Directive 2002/32/EC of the European Parliament and of the Council of 7 May 2002 on undesirable substances in animal feed – Council statement. URL: https://eur-lex.europa.eu/resource.html?uri=cellar:aca28b8c-bf9d-444f-b470-268f71df28fb.0002.02/DOC_1&format=PDF [25.04.2025].

In practical testing
Test plan

A detailed insight into the evaluation criteria for the practical part of the test and the scoring system can be found here. If you are also interested in the evaluation of our other test criteria, please read our document on the evaluation process.

Value for money

and consumer reviews

Finally, we examine how the product compares to the competition. Can it compete with the competition in terms of price and quality? Would we generally recommend it for purchase?

Finally, we examine how the product compares to the competition. Can it compete with the competition in terms of price and quality? Would we generally recommend it for purchase?

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Price/performance

Very good performance in the upper price segment

70

Points

OVERALL

70

Points

Weighting: 15%
*The maximum score is 100 points

Prices of up to £0.70 per tablet are charged online for equivalent products. Very inexpensive products are available from as little as £0.40 per tablet. XARTHRO® joint tablets for dogs are therefore currently in the upper price segment at €0.58 per tablet. The price-performance ratio is very good for the quality and performance obtained.

Overall result

1. Packaging & contents

20

98

Points

2. Product processing & appearance

20

95

Points

3. Practical test

45

98

Points

4. Price/performance & consumer reviews

15

70

Points

TOTAL

93

Points

*The maximum score is 100 points

Joint tablets for dogs
 of the brand 
XARTHRO®
achieved
93
Points in our test and therefore passed. The test was carried out in the test period
07/25
and is stored in our database under the licence number
241018001
. 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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