Creatine increases the potential of tendon damage, being tear or strain. When your muscles grow and you make size/strength gains, you're tendons & ligaments grow propotioniatly to these gains, creating a balance. However when you supplement creatine into your diet, overloading your body with 100's of times the amount of creatine it would naturally produce/intake over a years time in less than 1 week, you're muscles grow and swell in disproportionate to your ligaments. This extra stress on your ligaments increases the potential of tear and damage greatly. Picture in your mind a weight hanging from a rubber band. As the weight increases, the rubber band strength increases proportionately together. However, when taking creatine, the weight (muscle) grows in such disproportion to the rubber band (tendon), in such a short amount of time....well, damage is done...ACL tears, Rotator cuff damage, etc. This was the discussion today in one of my nutritional science classes. It seems like a pretty legitimate claim, and my professor seems to know what hes talking about. What do you guys think?