Flex+

  • Optimal dosage
  • Specifically for athletes
  • Developed by experts

€29,90 €467,19/kg, incl. VAT, excl. shipping

Delivery in 3-5 working days

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Athlete Stack: Men

Micronutrient stack for men

€31,90

>107.000 5-star reviews
Lab-tested quality
Scientifically developed

When strain is part of everyday life

The scientifically based formula with collagen and more complements your routine for training and everyday life.
Vitamin C for normal collagen formation¹
Zinc, manganese & copper for bones & connective tissue¹
With premium ingredient UC-II® collagen & hyaluronic acid
Optimized with curcumin, boswellia & PEA
Scientifically based formulation
Ideal for training & everyday life

Developed for your progress

Micronutrients

Vitamin C, zinc, manganese, and copper are essential micronutrients involved in key processes such as collagen formation, bone structure, and connective tissue. Vitamin C contributes to normal collagen formation¹, while zinc, manganese, and copper contribute to the maintenance of normal bones and connective tissue¹, thereby supporting the structural foundation.

Independently lab-tested quality

ESN product batches are tested by the independent laboratories GBA (Gesellschaft für Bioanalytik) and IfP (Privates Institut für Produktqualität) for product safety and accurate ingredient information, among other things. The reports are available as PDFs.

  • 80,000+ tests per year
  • Developed by experts
  • FSSC 22000 & HACCP certified

Frequently bought together

Optimise your training with these combined products.

Total price:

€29,90

The experts behind ESN

Nicolas Lother
Chief Product Officer
For us, quality isn’t a single step but the sum of everything – from the first idea to the finished product.
Stefan Schwarz
Vice President Quality
Others rely on spot checks – we don’t. Because mistakes happen at random, we consistently test every raw material and every batch in our in-house lab, without exception.
Dr. Mike O'Leary
Head of Product
A product can work as well as you like, but if the taste isn’t right, it doesn’t make it into our range. For me, effect and enjoyment always go hand in hand.
Daniel Margis
Research & Innovation Scientist
For me, every formula starts with one question: what does the latest research really say? Only then do we decide on ingredients and dosage.
How our product ratings are compiled and verified

All reviews that meet our guidelines are published – whether they’re positive or negative. Product reviews can only be submitted by people who have bought the product on esn.com and used it themselves. Reviews can only be left via a personal invitation by email.

Still have questions?

Find out more about the product here.

All Eyes on: Flex+

Faster, higher, further. When motivation is high, it's easy to push beyond your limits — often without realising the impact it can have on your body. Whether you're a beginner or a seasoned athlete, intense training puts additional strain on joints and connective tissue. 

That’s why it’s essential to support your foundation with purpose. Flex+ combines key micronutrients that contribute to the health of your bones, cartilage, and connective tissue: Vitamin C contributes to normal collagen formation, which is essential for the normal function of bones and cartilage. Zinc and manganese help maintain normal bones. Copper supports the maintenance of normal connective tissue. Manganese also contributes to normal connective tissue formation. Our team of nutritionists, doctors, and sports scientists have brought these four micronutrients together in a carefully developed formulation. 

To complete the formula, our experts added a range of high-quality ingredients: patented, undenatured type II collagen (UC-II®), hyaluronic acid, palmitoylethanolamide (PEA), turmeric root extract, pine bark extract, boswellia extract, bamboo leaf extract, and piperine.

Do not exceed the stated daily intake. Food supplementsare not a substitute for a balanced and varied diet andhealthy lifestyle. Store out of reach of young children. Not suitable for children, adolescents, pregnant or breastfeeding women.

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