Stem cell therapies involve the use of stem cells to treat or prevent diseases and conditions. Stem cells are unique because they can develop into different types of cells in the body, making them valuable for repairing damaged tissues. These therapies are being researched for various applications, including regenerative medicine and treating conditions like Parkinson's disease and spinal cord injuries. There are two main types of stem cells used in therapies: embryonic stem cells, which are derived from early-stage embryos, and adult stem cells, found in various tissues. While promising, stem cell therapies also raise ethical concerns and require careful regulation to ensure safety and effectiveness.