Scientists in Sweden have developed a more reliable way to create insulin-producing cells from human stem cells, bringing new momentum to efforts to treat type 1 diabetes. The research, published in Stem Cell Reports , shows that these lab-grown cells can effectively control blood sugar in tests and even reverse diabetes in mice. Type 1 diabetes develops when the immune system attacks and destroys the pancreas's insulin-producing cells. Without insulin, the body cannot properly absorb glucose from the bloodstream, leading to dangerous blood sugar levels. Replacing these lost cells has long been seen as a promising solution, but earlier attempts to grow them from stem cells have produced inconsistent results. "We have developed a method that reliably produces high-quality insulin-producing cells from multiple human stem cell lines.…