Research suggests black seed has anti-inflammatory and antibacterial properties that may help with conditions like psoriasis, asthma, hair loss, and acne. More studies in humans are needed to confirm most of these potential benefits.

Black seed oil is an herbal ingredient derived from Nigella sativa, native to Eastern Europe and Western Asia.

Preliminary evidence supports a few medicinal properties, primarily due to the seed’s high content of antioxidants and other bioactive compounds. Here are some potential health benefits of black seed.

Some research shows that external applications of black seed oil could benefit skin conditions like acne due to its antimicrobial and anti-inflammatory properties.

A 2020 study found that using a topical gel made with black seed extract twice daily for 60 days reduced acne severity by 78%. Researchers also noted a significant improvement in the number of acne lesions in study participants compared to those in a control group.

Although more human studies are needed, research generally shows that Nigella sativa extract has anti-inflammatory benefits, and animal studies suggest that black seed oil could reduce skin inflammation and other symptoms of psoriasis.

A 2017 review also found that combining oral and topical forms of black seed extract reduces symptoms of psoriasis and improves skin lesions.

Black seed oil contains a compound called thymoquinone, which, when applied directly to the skin, may stimulate tissue growth and facilitate wound healing.

The 2017 review mentioned before also noted that animal studies have found that thymoquinone, due to its anti-inflammatory, antioxidant, and antibacterial effects, may help treat burns, excisions, and other types of wounds. The oil seems to increase collagen production and have moisturizing effects, both beneficial to wound healing.

Black seed extract may be good for the hair. It is often added to hair care products, including masks and shampoos. A 2020 review highlighted a small study in which the daily use of a Nigella sativa extract lotion for 3 months significantly increased hair density and thickness in people with telogen effluvium, a common form of hair loss.

The same review found a study with 90 participants using different seed oils for hair loss. Nigella sativa oil was the most effective at reducing hair loss.

A 2020 review found a small study indicating that inhaled boiled black seed extract has a potential bronchodilatory effect on people with asthma, improving all markers of lung function and respiratory rate (i.e., helping them breathe better.)

A 2021 meta-analysis of four randomized controlled studies also found that black seed supplements may help manage asthma through the seed’s anti-inflammatory effects.

More clinical data is needed to confirm the potential benefits of black seed oil for lung health.

Before using any form of black seed, it’s important to consult with a healthcare professional to avoid allergic reactions or other adverse effects.

Some research suggests that black seed oil could be beneficial for treating vitiligo, a disorder that causes loss of pigmentation in the skin.

One study of 33 people with vitiligo found that twice-daily skin application of a cream made with black seed oil improved pigmentation in the hands, face, and genital region after 6 months.

Researchers suggest that black seed oil’s benefits for vitiligo may be due to its ability to spread melanin within the skin. Melanin is a natural pigment found in hair, skin, and eyes. More research is needed.

Studies have shown that black seed oil has powerful anti-inflammatory properties. This could benefit multiple aspects of health, as research suggests that inflammation contributes to the development of chronic conditions like type 2 diabetes, heart disease, and cancer.

A study of 45 women with overweight or obesity showed that taking 2,000 mg of black seed oil daily for 8 weeks decreased appetite and reduced body mass index, body weight, waist circumference, and body fat.

Few studies have examined the long-term use of black seed oil, so caution is highly advised when taking the supplement in large quantities and for a long time. Also, contrary to prescription drugs, supplements are not strongly regulated in the United States, which could lead to safety concerns.

Some research shows that black seed oil could be beneficial for stabilizing blood sugar levels. A 2019 review, for example, found that black seed may improve multiple markers, including insulin levels and blood sugar levels during fasting and after a meal.

Research suggests that black seed oil could help reduce the risk of metabolic syndrome, a cluster of conditions that can increase the chance of developing heart disease, stroke, and type 2 diabetes.

One clinical trial involved 55 people with high blood pressure. Participants took 2.5 mL of black seed oil twice daily for 8 weeks. At the end of the study, those who received the dosage showed improvement in different aspects. Most of them experienced reduced diastolic blood pressure, total cholesterol, LDL (bad) cholesterol, and fasting blood sugar levels.

However, research has often shown that a well-rounded, whole-food diet and an active lifestyle are the best prevention methods against metabolic syndrome. Supplements like black seed oil may add to a healthy lifestyle. It’s important to consult with a healthcare professional for a comprehensive treatment plan that applies to your individual health needs.

Is it OK to take black seed oil every day?

Black seed oil is likely safe when consumed in small amounts, such as when used in cooking or as a supplement for less than 3 months. However, more research is still needed on the safety of taking it in larger amounts and for longer.

It is best to talk with a doctor before taking any supplement. It may be unsafe to take black seed oil if you are pregnant or have certain underlying health conditions.

Learn about the safety and potential side effects of black seed oil.

Does black seed oil grow hair?

Black seed oil is often an ingredient in shampoos and hair masks, as it has antimicrobial and antioxidant properties that may help support your overall hair health. Some evidence suggests that it may help with hair loss associated with inflammation or telogen effluvium.

Black seed oil may be a promising natural remedy for conditions such as vitiligo, hair loss, psoriasis, metabolic syndrome, and asthma. It may also help with inflammatory conditions and weight management.

It is important, however, to always check with a healthcare professional before taking any supplements or natural remedies, especially if you take prescription medications. Black seed may interact with other supplements and drugs or not work for your individual needs.