Pro Flex

614 reviews
Complete joint support
Quantity: 400 g / 20 servings

Premium joint support formula, combining hydrolyzed collagen with other top-quality ingredients to reduce discomfort and keep your joints in top condition.

✔ Reduces joint discomfort
✔ Aids in cartilage protection and repair
✔ Enhances flexibility and mobility
✔ Helps protect joints from wear and tear
✔ Improves joint hydration


Try a few different flavors
Regular price€39.99 Sale price€24.99Save €15.00
Flavour:
Quantity: 400 g / 20 servings
Peach

Tropical

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Pro Flex

Pro Flex

€39.99 €24.99

Pro Flex is a complete joint support supplement designed for endurance athletes who want to boost the strength and flexibility of joints and ligaments. Helping you stay active and perform at your best without discomfort.

Formulated with a powerful blend of hydrolyzed collagen, MSM, boswellia, glucosamine and chondroitin, Pro Flex works synergistically to support joint strength, reduce discomfort, and improve mobility.

It is also packed with vitamin C, vitamin B6, and vitamin D to further maximize the effectiveness of its high-quality ingredients and keep your joints in top condition.

Boost the strength and flexibility of your joints with Pro Flex, and train without joint discomfort!

  • Reduces joint discomfort
  • Aids in cartilage protection and repair
  • Enhances flexibility and mobility
  • Helps protect joints from wear and tear
  • Improves joint hydration
  • Increases joint health and strength
  • Boosts the immune system
  • Boosts collagen production

Mix 3 scoops (20 g) with 250-400 ml of water.

The product is best taken between the two main meals during the day.

Tip: The product does not contain artificial substances, such as guar gum or xanthan gum, so mixing with water is a little more difficult. We recommend using a shaker or blender. It is best if the water is at room temperature.

Attention: Do not take if allergic to mussels, crabs, and other crustaceans!

The product is not a cure and is not intended for the treatment of serious issues, such as degenerative tissue, injuries, and conditions such as osteoarthritis, among others. If you have a more serious injury, please consult your doctor.

 

1 serving (20 g)

%RDA

Hydrolyzed collagen

9000 mg **

Glucosamine sulfate

1500 mg **

Glucosamine

900 mg **

Chondroitin sulfate

1200 mg **

Chondrotin

970 mg **

Methylsuflonylmethane (MSM)

300 mg **

Boswellia serrata resin extract

200 mg **

Vitamin C

100 mg (125%)*

Hyaluronic acid

20 mg **

Vitamin B6

5 mg (357%)*

Vitamin D

7.5 mCg (150%)*

*Reference intake **Reference intake is not defined

Food supplement. Ingredients: hydrolyzed collagen, maltodextrin, acidity regulators: citric acid, malic acid, glucosamine sulphate KCI (from CRUSTACEANS), chondroitin sulphate, methylsulfonylmethane (MSM), extract from the resin of Indian frankincense (Boswellia serrata), L-ascorbic acid (vitamin C), flavorings, color: carotenes, sodium hyaluronate, pyridoxine hydrochloride (vitamin B6), cholecalciferol (vitamin D), sweetener: sucralose. May contain traces of CEREALS, GLUTEN, SOYBEANS, MILK. The product is not suitable for people who are allergic to shellfish, crabs or crustaceans. Net quantity: 400g

What is Pro Flex?
Pro Flex is a joint support supplement for endurance athletes. It combines hydrolyzed collagen (bovine collagen types I and III), MSM, glucosamine, chondroitin, boswellia, and vitamins to support joint health and mobility.

Who should take Pro Flex?
Pro Flex is ideal for athletes who want to keep their joints in good condition, and maintain mobility. It can also be used by athletes with injuries or arthritis. However, it is not intended to treat or cure any disease.

Can I take Pro Flex every day? 
After 3 months of use, we recommend taking a 3–4 week break from Pro Flex. This is because Pro Flex contains boswellia. Regular and prolonged use of boswellia can result in the body developing a tolerance. Pro Flex also contains hyaluronic acid and MSM. While these are considered safe to take every day, long-term continuous use could interfere with the body’s own production of hyaluronic acid and MSM.
The short break from Pro Flex helps the body reset and ensures long-term effectiveness of the supplement. 

How do the ingredients in Pro Flex support joint health?

  • Hydrolyzed collagen: Provides the building blocks for connective tissue, helping support the structure and resilience of joints, tendons, and ligaments.
  • Glucosamine sulfate: Lubricates joints and protects them from wear and tear.
  • Chondroitin: Protects cartilage from degradation.
  • MSM (methylsulfonylmethane): Stimulates collagen and glucosamine production.
  • Boswellia: Provides natural anti-inflammatory support.
  • Hyaluronic acid: Helps keep joints hydrated and sustains joint mobility.
  • Vitamins C and B6: Enhance the benefits and synergy of the other ingredients.
  • Vitamin D: Strengthens bones.

How do I take Pro Flex?
Mix 3 scoops (20 g) with 250–400 ml of water. The product is best taken between meals. For best results, use a shaker or blender with room-temperature water, as Pro Flex does not contain artificial thickeners and may clump when mixed by hand.

How long until I notice benefits from Pro Flex? 
Pro Flex is formulated to support joint health and prevent damage to connective tissues. Because of this, you may not notice any immediate benefits from Pro Flex. The benefits are in avoiding future problems and not curing current diseases or speeding up injury recovery. 
Some people do take Pro Flex for medical issues. However, we do not guarantee any benefits for serious conditions and individual response may vary. Remember, joint and tissue regeneration is a gradual process and it can take months to feel improvement from these conditions. 

Can Pro Flex replace medical treatment for joint issues?
No. Pro Flex is a food supplement and is not a cure for serious conditions such as osteoarthritis, degenerative tissue conditions, tendonitis, or injuries. Consult your doctor for serious joint problems.

Where is Pro Flex made? 
Pro Flex is made in our manufacturing facility in Slovenia or the EU. The collagen is sourced from Germany. Most of the ingredients are also sourced from the EU. Some ingredients may be sourced outside of the EU. In these cases, we follow rigorous quality controls to ensure the safety and purity of all ingredients.

Can I take Pro Flex with other supplements?
Yes, Pro Flex can be combined with general nutrition, protein, or endurance supplements. Avoid taking multiple products that contain high doses of similar joint support compounds unless recommended by a healthcare professional.

Can I take Pro Flex if I am pregnant or breastfeeding?
Consult your doctor before using Pro Flex if you are pregnant or breastfeeding, as there is limited safety data for this group.

How should I store Pro Flex?
Store in a cool, dry place, away from direct sunlight. Make sure to close the lid tightly after each use. Avoid storing Pro Flex in the fridge because of moisture.

Why are there clumps in my Pro Flex?
The main ingredient of Pro Flex is hydrolyzed collagen, which absorbs water, so it is prone to clumping. To prevent clumping, make sure to store Pro Flex in a dry place and keep the container sealed.

What’s the difference between hydrolyzed collagen and non-hydrolyzed collagen? 
Hydrolyzed collagen, also known as collagen peptides, is collagen that has been fully broken down into small peptides. This makes it easier to digest and absorb, allowing the body to use it more efficiently for joints, ligaments, and connective tissue.

By contrast, non-hydrolyzed (native) collagen retains its original structure and is more difficult for the body to digest and absorb.

What type of collagen is in Pro Flex?
Pro Flex contains Type I and Type III collagen. Type I collagen makes up around 90% of the body’s collagen and provides structural support to the skin, bones, tendons, and ligaments. Type III collagen plays an important role in supporting muscles and connective tissue around joints. Because Type I and Type III collagen are the primary components of tendons and ligaments, they are well suited to the needs of athletes dealing with sport-related joint and connective tissue stress.

Which part of the animal does the collagen in Pro Flex come from?
Pro Flex uses bovine collagen that is derived from the connective tissue of the animals, such as the skin and cartilage.

How many calories are in Pro Flex?
Under EU law, collagen products do not list their nutritional values in the same way food supplements are listed. Collagen is a protein and contains 4 calories per gram. It contains no fat.

Why is maltodextrin in Pro Flex?
Maltodextrin is used as a carrier and bulking agent to help evenly distribute the active ingredients in Pro Flex. It also improves texture and solubility, making the powder easier to mix and dissolve in liquids. In addition, its mild, neutral flavor helps mask the bitter or strong taste of certain active ingredients.

Why is Pro Flex made from bovine collagen instead of marine collagen?
Bovine collagen is naturally richer in Type I and Type III collagen, which are particularly important for tendons, ligaments, and cartilage. This makes it better suited for supporting joint health and performance in athletes. Marine collagen, by contrast, is more commonly used for skin, hair, and nails rather than joint and connective tissue support. In addition, bovine collagen is more cost-effective and offers better heat stability during processing.

Are there any allergens in Pro Flex?
Pro Flex contains glucosamine from crustaceans (crabs, mussels). It is not suitable for people allergic to shellfish, crabs, or crustaceans. It may also contain traces of cereals, gluten, soy, and milk. Always check the ingredient list if you have allergies.

Is Pro Flex suitable for vegans or vegetarians?
No. Pro Flex contains animal-derived collagen and glucosamine from crustaceans, so it is not suitable for vegans or vegetarians.

Are there any side effects associated with Pro Flex? 
For some people, collagen can be hard to digest and can cause digestive side effects. If you have digestive side effects from Pro Flex, we recommend splitting the dosage into smaller servings or taking it with meals to slow absorption.

Is Pro Flex WADA-compliant?
Yes. Pro Flex is free from banned substances, regularly checked, and manufactured in a GMP-approved facility with the highest ISO 22000 standard. Furthermore, our suppliers also have a certificate confirming that their products are free of impurities.

Trusted by professional athletes

  • 5 stars: 414 (67%)
  • 4 stars: 106 (17%)
  • 3 stars: 53 (9%)
  • 2 stars: 18 (3%)
  • 1 star: 23 (4%)
P
Pit (Donauwörth, DE)
Verpackungsmüll

Das Produkt selbst ist sehr gut.
Ich verstehe aber nicht warum 400g Pulver in einer Dose verpackt sind in der locker 1kg Platz haben. Zumal an anderer Stelle hier im Shopp die Reduzierung von Verpackungsmüll angeprangert wird indem für Nrgy-Gels ein Verschluss-System entwickelt wurde bei dem sich der Deckel nicht komplett abreißen lässt.

Hallo Peter,

vielen Dank für Dein positives Feedback zur Wirkung von Pro Flex und Deine ehrliche Kritik bezüglich der Verpackung.

Wir verstehen Deinen Unmut absolut. Dass die Dose auf den ersten Blick zu groß wirkt, liegt an technischen Vorgaben beim Abfüllprozess: Das Pulver benötigt direkt nach der Abfüllung ein gewisses Luftvolumen (den sogenannten Abfüllraum), um maschinell versiegelt zu werden. Zudem setzt sich das Pulver während des Transports noch stark ab, wodurch in der Dose nachträglich viel freier Raum entsteht.

Dennoch nehmen wir Deinen Hinweis sehr ernst. Dein Vergleich mit unseren Systemen zur Müllreduzierung ist vollkommen berechtigt. Wir arbeiten kontinuierlich daran, unsere Verpackungsgrößen zu optimieren und den Materialeinsatz über unser gesamtes Sortiment hinweg so gering wie möglich zu halten.

Vielen Dank, dass Du uns dabei hilfst, noch besser zu werden!

Sportliche Grüße,
Dein 4Endurance Team

Γ
Γεώργιος Τ. (Athens, GR)

Πολύ καλό

S
Silviu (Oradea, RO)
Great taste

Cant yet comment if it works or not,but taste is good and it disolves properly in water

Hello Silviu,

Thank you for your feedback!

We're happy to hear that you're enjoying the taste and that the product dissolves well in water. We hope you'll continue to have a positive experience as you use it and get a chance to see the results for yourself.

Thanks again for giving it a try and for sharing your first impressions with us!

Best regards,
4Endurance Team

R
Riccardo P. (Pescara, IT)
Prodotto eccellente

Ho iniziato a prendere Proflex perché sentivo un po’ di fastidio e degli scricchiolii alle ginocchia. Da quando lo uso, mi sento sempre meglio

Grazie mille Riccardo, ci fa davvero piacere sapere che Pro Flex ti stia aiutando e che tu stia notando un miglioramento alle ginocchia 😊💪 continua così e buona attività!

H
Herve B. (Nice, FR)
Très bon produit

J’ai fait une cure de deux mois de pro flex et le résultat est bluffant
La sensation de genoux durs lors des grosses sorties ont disparu.
Je vais intégrer ce complément dans mon alimentation en fonction des saisons

C
CLAUDIO G. (Bologna, IT)
Buon prodotto

Lo sto usando solo da una settimana, per cui al momento è presto per dare un giudizio completo sull’efficacia. Però posso dire che a differenza da quanto avevo letto non ho avuto alcuna difficoltà a scioglierlo ed ha un buon sapore. Per adesso la prima sensazione nel complesso è positiva.

C
Cristiano C. (Prato, IT)
4endurance pro flex

Prodotto ideale per la mia età 47 anni, evita tantissimi dolori articolari e lubrifica le articolazioni

Siamo davvero felici che questo prodotto ti sia d'aiuto

A
Anonymous (Zagreb, HR)
U potpunosti zadovoljna proizvodom

U potpunosti zadovoljna proizvodom. Bolovi u koljenu nestali nakon tjedan dana uzimanja proizvoda. Preporučam:)

Pozdrav, hvala puno na prekrasnoj recenziji 🙏

Jako nam je drago čuti da ste u potpunosti zadovoljni proizvodom i da su se bolovi u koljenu smanjili već nakon tjedan dana korištenja 💪

Puno hvala na preporuci, to nam zaista znači! Veliki pozdrav od ekipe 4Endurance

M
Michiel K.
Ik gebruik pro flex al minimaal een jaar en ben

Ik gebruik pro flex al minimaal een jaar en ben er heel tevreden over. Als ik ermee stop merk ik dat binnen een week al aan mijn knieën.

Hello Michiel, dank je wel voor je mooie review en je vertrouwen in Pro Flex 🙏

Geweldig om te horen dat je zo’n duidelijk verschil merkt en dat het zo goed voor je knieën werkt 💪 Dat is precies wat we willen bereiken.

Ook bedankt voor het delen van de foto’s — we waarderen dat echt enorm

Als je ooit vragen hebt of ergens hulp bij nodig hebt, laat het gerust weten!

M
Mario B. (Novi Ligure, IT)
Pro Flex

Da quando l' ho provato sento le articolazioni meglio

Grazie, siamo lieti che il prodotto ti sia piaciuto

F
Floriana G. (Rome, IT)
Ottimo

Ho già provato ProFlex, è un ottimo prodotto. Consigliatissimo.

Top, Grazie :)

A
ANDREA B. (Milan, IT)
Pro Flex

Lo uso ormai da diverso tempo e lo trovo assolutamente indispensabile per le mie articolazioni…

Ottimo! Siamo davvero felici che il prodotto ti sia utile!

O
Orlando S. (Catania, IT)

Pro Flex

F
Floryan L.

Pro Flex

M
Michiel V. (Antwerp, BE)
Pro flex

I dont really feel any differance.
But super happy with the nduranz gels and energy drink

Hi Michiel, Thank you for your honest feedback, we really appreciate you taking the time to share your experience.

We’re glad to hear you’re super happy with the Nduranz energy gels and isotonic sports drink 💪
With Pro Flex, results can vary depending on several factors, so we’d love to understand a bit more about your situation. For example:

How long have you been using Pro Flex?

Are you taking it for injury recovery or general joint/tendon prevention?

If it’s for an injury, how severe is it and how long have you had it?

Have you seen a physiotherapist and are you doing any specific rehab exercises?

We also don’t mind asking your age, as this can play a role in recovery and collagen response.

If you’re open to it, we’d recommend reaching out to us directly at info@4endurance.eu
so we can discuss this in more detail and give you more personalised advice in private. Best regards!

R
Radu D.
Pro flex tropical flavour

Am dat două stele pentru gustul “Tropical” oribill. Eu nu pot să-l înghit. De proprietăți nu știu ce să zic ca nu pot să-l folosesc.

Bună,

Ne cerem scuze pentru experiența neplăcută. Gusturile sunt, desigur, ceva foarte personal — ceea ce unei persoane îi poate plăcea, alteia poate să nu îi fie pe plac.

Te rugăm să ne scrii la info@4endurance.eu, ca să putem găsi o soluție și să te compensăm pentru această experiență neplăcută.

Cu stimă,
Echipa 4Endurance

M
Marco M. (Genoa, IT)
Propflex Ottimo prodotto

Lo consiglio

A
Anonymous (Rome, IT)
PRO FLEX - Tropical flavour

Pensavo che la mia carriera da calciatore e running fosse arrivata al capolinea. A 42 anni con un fisico sportivo non riuscivo a convincermi di smettere di praticare sport. La pubblicità di 4endurance sul web era l'ultima possibilità che mi concedevo dopo aver provato di tutto. Inizio a provarlo per 3 settimane, ma niente... il dolore al ginocchio si faceva sentire. Ma non volevo mollare perché ci credevo in questo prodotto. Quindi ne ho acquistati altre 3 perché in tutte le cose i risultati si ottengono con la costanza e la perseveranza così ho continuato a prendere il PRO FLEX per altri 2 mesi. Mi chiamo Antonio ho fatto una risonanza magnetica Maggio 2024 riscontrando "assottigliamento della cartilagine e una fissura al menisco". Infortunio rimediato in un torneo a calcio a 7 Gennaio 2024 con una mezza torsione del ginocchio. Praticamente fine dei giochi da parte di tutti gli ortopedici e di chi aveva subìto questo tipo di infortunio che mi diceva lascia stare calcio e corsa e datti al ciclismo e nuoto. Ma io testa dura non volevo lasciare né uno né l'altro e grazie "PRO FLEX" non sento più dolore e sono ritornato a correre e segnare gol a valanga a 43 anni. Grazie PRO FLEX per la mia rinascita, GRAZIE 4Endurance per i prodotti eccellenti!!!!

Grazie per questa straordinaria storia di vita :) L'abbiamo letta con entusiasmo. Siamo davvero felici che il prodotto vi abbia aiutato e che siate di nuovo attivi negli sport che amate :)

A
Antonio D. (Rome, IT)
PRO FLEX - Tropical flavour

Je pensais que ma carrière de footballeur et de coureur était terminée. À 42 ans, avec un physique athlétique, je n’arrivais pas à arrêter le sport. Puis, je suis tombé sur une publicité de 4Endurance sur Internet – c’était ma dernière chance, après avoir tout essayé. J’ai commencé à l’utiliser pendant trois semaines, mais rien… la douleur au genou était toujours là. Pourtant, je ne voulais pas abandonner, car je croyais en ce produit. Alors, j’en ai acheté trois autres, car les résultats viennent avec la constance et la persévérance. J’ai continué à prendre PRO FLEX pendant encore deux mois.

Je m’appelle Antonio. En mai 2024, une IRM a révélé un amincissement du cartilage et une fissure du ménisque. La blessure s’est produite en janvier 2024, lors d’un tournoi de football à 7, après une légère torsion du genou. Pratiquement tous les spécialistes en orthopédie et les personnes ayant subi ce type de blessure m’ont dit d’arrêter le football et la course à pied et de me tourner vers le vélo et la natation. Mais j’étais obstiné, je ne voulais pas abandonner. Grâce à PRO FLEX, je ne ressens plus de douleur, et à 43 ans, je suis de retour à la course et je marque à nouveau des buts !

Merci PRO FLEX pour ma renaissance sportive, et MERCI 4Endurance pour vos produits excellents !!!

Grazie per questa straordinaria storia di vita :) L'abbiamo letta con entusiasmo. Siamo davvero felici che il prodotto vi abbia aiutato e che siate di nuovo attivi negli sport che amate :)

At 4Endurance, our mission is simple

To provide elite-level nutrition at accessible prices for all. We follow the latest science in sports nutrition and use only high-quality ingredients that support your performance. From amateur enthusiasts to professional teams, we support athletes of all levels in reaching their goals.