The colonization of Mars no longer seems to be an abstract vision of the future. For a long time now NASA scientists have been conducting a research on how to enable human life on a planet other than Earth. It turns out that the technology developed by them, intended to support the vegetation of plants on space missions, is ideal for relieving the side effects of chemotherapy and radiation treatment in bone marrow and stem cell transplant patients. The remedy proved to be the red light emitted by LEDs in the HEALS therapy (High Emissivity Aluminiferous Luminescent Substrate). The long waves of light released in this way stimulate cells to accelerated healing. This light also contributes to healing of inflammation of oral mucositis, which is a common side effect in radiotherapy and chemotherapy. 96% of patients also reported a reduction of pain. Thanks to this discovery, NASA is interested in using the HEALS technology not only to support space farming, but also for medical applications in space.