Every day our joints undergo wear and tear, testing our body's ability to stay flexible. Now nutritional science offers Enhance. Source Naturals Arthred is an all- natural product clinically reported to nutritionally support healthy joint function. Arthred was originally developed in Germany from bovine cartilage, based on research showing its benefits for connective tissue. Today Arthred is patented and is recognized as a functional food --- a food that can positively influence specific body functions. Arthred's patented formula consists of 19 amino acids bonded together in a short chain. These amino acids are the building blocks for joint cartilage. The potential benefits of Arthred may be felt in 3 months.