Structural analysis of a micron-sized deposit of Cu0 in an insulin ball from a person with diabetes

The largest amount of Cu⁰ found in living things is in a human. Our discovery of 100 µm Cu⁰ within the insulin ball supports the idea that insulin preparations from outside can disrupt the balance of metals, including Cu. In 2025, the patient continues to inject subcutaneous insulin preparations, but no new insulin balls appear.