Black Cumin Seeds: Benefits and Side Effects

Black cumin seed is derived from a plant with the botanical name Nigella sativa. The plant is indigenous to Mediterranean areas, though it is grown in other parts of the world as well. The seeds of the Nigella sativa plant are black in color and look something like sesame seeds. Both the seeds and oil from the seeds are used as a nutritional supplement.

Black cumin seed is considered to have a number of beneficial properties when used as part of an overall holistic health program. Many studies show that, while black cumin seed is effective by itself, it is particularly potent when combined with other herbs in regimens used to treat specific ailments.

Black cumin seed (also referred to simply as “black seed”) has been used as a nutritional supplement for centuries. It was even found in King Tut’s tomb, suggesting that even centuries ago, great respect existed for black cumin seed’s beneficial health effects. Ancient traditions document the use of black cumin seed as an energy source, perhaps because of its rich nutritional value. The seeds are still believed to increase heat in the body, making metabolism more efficient.

As a nutritional supplement in modern times, black cumin seed is used to treat respiratory conditions like bronchitis, asthma and emphysema. In addition, it is used to support stomach and intestinal health as well as kidney and liver function. Black cumin seed is thought to have antihistamine-like properties that make it useful in treating congestion, and it is widely used as a general tonic to boost immune function and to help prevent cancer.

Several skin conditions can be treated with black cumin seed, and it is also used to enhance circulation. Over the past six decades, black cumin seed has been studied at various universities throughout the world, and more than 200 studies support its use as an effective herbal supplement.


The primary active ingredient in black cumin seed is crystalline nigellone. The substance was first identified and isolated for use in supplements in 1959. Other components with health benefits include amino acids, essential fatty acids, crude fiber, and minerals such as potassium, sodium, iron and calcium.

The usual recommended dosage is between 50 and 75 mg of a supplement made from standardized extracts. Black cumin seed oil is also available as a nutritional supplement. The seeds are cold pressed to extract the oil, which is especially effective when used topically on the skin to treat eczema, psoriasis, and dryness.

Black cumin seed oil can also be taken internally to treat arthritis and asthma and to boost the immune system. The recommended dosage of the oil is one teaspoon daily with meals. It can be mixed with juice or other beverages and should be refrigerated after opening.

As with many supplements, black cumin seed works best when used on a regular basis so that it can support the body’s natural healing ability. Though there is no known toxicity, pregnant and lactating women should not use black cumin seed, which has a history of use in large doses to induce abortion.