A composition and method for treating solid tumors in a mammalian subject. The composition includes halobacterial extracts and Dunaliella extracts, containing antioxidants. The composition also includes: (a) at least one water soluble fraction and, (b) at least one oil soluble fraction. The aforementioned extracts, together as a composition, are adapted for therapeutic treatment of solid tumor reduction. Furthermore, the composition is adapted to promote solid tumor reduction in radiation treatment in vitro and in vivo.
