Stem cell therapies are successfully growing new, insulin-producing cells to replace damaged ones.

Donor organs are rare. To cure millions, we need an endless supply of healthy beta cells. Scientists have now figured out how to guide human embryonic stem cells in a petri dish, turning them into fully functional, insulin-producing islet cells. This is no longer science fiction. In recent clinical trials, patients with Type 1 diabetes received these lab-grown cells. The results were staggering. The cells successfully grafted into the patients' bodies, sensed blood sugar levels, and produced insulin. In some cases, patients achieved near-total insulin independence. The next hurdle is protecting these cells from immune attack without using harsh immunosuppressant drugs, perhaps by wrapping them in a microscopic, protective capsule.