Dimethyl sulfoxide or DMSO is effective in treating cancer in humans. It can cause cancerous cells to become noncancerous, or benign, and can slow or stop the progress of cancer in the bladder, colon, ovary,breast, and skin.

it is useful in treating leukemia, and it has also been used as a part of some metabolic cancer therapies.

Some people have promoted DMSO as preventing cancer. It works by “cleaning” cell membranes and decreasing the effect of cancer-causing substances.