Effect of Collavant® n2 in Healthy Male Adults With Exercise-induced Joint Discomfort.

Inclusion Criteria: * Healthy physically active male adults (amateur runners) with exercise-induced joint discomfort, aged between 40 and 65 years * Activity level: Amateur runners who train regularly a minimum of 150 minutes per week, divided into 2 or more sessions per week during at least 3 months. Principally, subjects training for popular running events of 10 Kms. * Joint discomfort after activity: Self-reports target knee discomfort after training by a score of at least 20 mm VAS at screening. Discomfort persistent for at least 2w. * Be willing to refrain from starting any new dietary supplements during the entire study that have any underlying joint benefits (collagen, glucosamine, chondroitin, MSM, Hyaluronic Acid, Turmeric, Natural Eggshell Membrane, Omega-3 fatty acids, PEA, Boswellia,..). If any of these supplements (except collagen) or any other dietary supplement has been taken consistently for at least 6 months prior to enrollment, participants should maintain the same stable intake pattern throughout the 24 week study period. * Have individual devices to monitor training with GPS * Sign informed consent Exclusion Criteria: * Diagnostic of knee osteoarthritis or any pathology or surgical intervention associated with the knee. * Hypersensitivity to any component of the supplement or the placebo * Chronic treatment with analgesic or anti-inflammatory (NSAIDs and corticosteroids families) drugs * Treatment with any type of collagen supplement * Treatment with probiotics or antibiotics * Inability to train for the next 24 weeks * Follow a vegan diet