Aloe Vera Stimulates Immune Response Against Cancer

Aloe may help prolong survival time and stimulate the immune system of cancer patients, according to recent research.

In a 1994 study in the Japanese medical journal Yakhak Hoeji, mice with cancerous tumors were given aloe orally for 14 days. While the aloe did not suppress tumor growth, the average life span of the mice was prolonged by 22% for those given 50mg aloe/kg body weight and by 32% for those given 100mg/kg daily. A simultaneous experiment on human cancer cells (outside the body) found that high doses of aloe significantly suppressed the growth of these cancer cells.

Researchers writing in Cancer Immunology and Immunotherapy found that a compound (lectin) from aloe, when injected directly into tumors, activated the immune system to attack the cancer. Killer T cells, white blood cells that bind to invading cells and destroy them, began to attack the tumor cells injected with lectin.

Aloe turns on the immune system by activating macrophages (white blood cells which "swallow" antigens), causing the release of immune-activating (and anticancer) substances such as interferons, interleukines, and tumor necrosis factor. In addition, aloe promotes the growth of normal (non-cancerous) cells, researchers said.