Unveiling the power of nutraceuticals: Revolutionizing oral cancer prevention and treatment

•Seaweeds provide nutraceutical compounds for cancer prevention, arthritis relief, and cardiovascular protection.•Disparity in cancer rates between Western countries and Japan highlights the impact of dietary choices on public health.•Seaweed consumption in East Asia is linked to reduced mortality rates in colon and rectal cancer patients.•Certain seaweeds, like Laminaria/Saccharina sp. and Undaria pinnatifida, may offer protective effects against breast cancer.•Understanding seaweed's nutritional profiles is vital for cancer prevention and guiding nutraceutical development.