We have added a new food to Food for Breast Cancer: black cumin. Below is the write-up.
Black cumin (Nigella sativa) seeds are used as a spice in Indian and Middle Eastern cooking. Thymoquinone, the major bioactive compound, has been shown to have anti-oxidant and chemopreventive properties.
In addition to its role as a spice, black cumin has traditionally been used to treat various diseases, including fever, intestinal problems, diabetes, asthma and cancer.

Breast cancer effects of black cumin

Numerous studies have reported that thymoquinone or black cumin seed extract have anti-cancer activity in animal models of triple negative (ER-/PR-/HER2-) breast cancer, as well as in ER-/PR-/HER2- breast cancer cells. Thymoquinone has antiproliferative effects and promotes programmed cell death. The picture is less clear in hormone receptor positive (ER+/PR+) breast cancer—some studies have reported only a modest reduction in growth or proliferation as a result of treatment with thymoquinone.
Thymoquinone has been shown to increases the effectiveness of Taxol, Taxotere, Adriamycin and cisplatin in both ER+/PR+ and ER-/PR-/HER2- breast cancer models. For example, one study using tumor-bearing mice reported that the combination of thymoquinone plus Adriamycin suppressed tumor growth more than treatment with Adriamycin alone. Thymoquinone also potentiates the cytotoxic effects of tamoxifen in ER+/PR+ breast cancer. In addition, thymoquinone has been shown to radiosensitize ER+/PR+ breast cancer cells, thereby increasing the treatment effects of radiotherapy.

Additional comments

Black cumin is a member of the buttercup family (Ranunculaceae). It is also known as black seed, Roman coriander, fennel flower, nutmeg flower and black caraway. Hence, it is important to verify that you are purchasing Nigella sativa. Organic is best since it reduces the likelihood of contamination or admixture of other spices. Black cumin can be ground and used similarly to black pepper in cooking. Black cumin is not related to cumin (Cuminum cyminum), which a member of the parsley family.
Although black cumin seed oil is available as a supplement, we do not recommend it. The safety of this more concentrated source of thymoquinone has not been established. Like other compounds with anti-cancer effects found in food, we favor using thymoquinone at the relatively low dose available in black cumin seeds rather than attempting to obtain pharmacological effects from a higher dose.