No, Outlast does not prevent ulcers. Outlast is a brand of fabric technology that helps regulate body temperature and reduce moisture in clothing. It works by absorbing excess heat and releasing it slowly over time, which can be beneficial for those who are prone to overheating or night sweats. While the technology may provide some comfort to people with skin conditions like eczema or psoriasis, there is no evidence that it prevents or cures ulcers. Ulcers form when stomach acid erodes the protective lining of the digestive tract and are usually treated with medications such as proton-pump inhibitors (PPIs) or histamine-2 receptor antagonists (H2RAs). For prevention, lifestyle changes such as avoiding spicy foods and reducing stress can help keep them from forming in the first place.