Melatonin inhibition and pinealectomy enhancement of 7,12-dimethylbenz(a)anthracene-induced mammary tumors in the rat
Unknown authors · 1981
Researchers gave rats a cancer-causing chemical and found that melatonin (a hormone made by the pineal gland) dramatically reduced mammary tumor rates from 79% to just 20%. When they surgically removed the pineal gland, tumor rates jumped to 88%, showing this gland's protective role against breast cancer.