Intense workouts can be tough on joints and achy joints can impair performance. Proven 4 offers a joint support complex with key ingredients, shown to aid in lubrication of joints and relieving aches while improving mobility. Our Glucosamine / Chondroitin / MSM complex is packed full of effective doses of each of these ingredients. Taken daily, this workout supplement will keep the pep in your step ensuring optimal performance in and out of the gym.