Black seed oil has shown potential to improve hair density and reduce hair loss in a 28-day clinical study. The study used a scalp lotion containing 5% of a cold-pressed black seed oil ingredient, which contains 3% thymoquinone and has low free fatty acids. The research involved 22 adults across genders. The findings showed a 35% reduction in hair loss, a 7% increase in hair density, visible stimulation of hair growth, and improved scalp comfort and hydration.
Positive results after 28 days
The study examined dermatological tolerance, standardized dry hair loss, and hair density. Participants applied the scalp lotion once a day for 28 days and were evaluated both at baseline and when the study was completed.
The results were supported by participants’ own observations. Some 82% reported a visible reduction in hair loss and visible stimulation of hair growth. A total of 77% said their hair felt stronger and had more volume.
The formula was described as having an inoffensive sensory profile, with 95% of participants saying it was gentle and suitable for the scalp. The clinical results showed potential for reducing hair loss and improving the appearance of the hair.
Four ways the ingredient supports hair and scalp health
The ingredient works through four main areas: antioxidant, anti-inflammatory, mitochondrial, and microbiome support. Together, these properties provide support for the skin, scalp, and hair.
Its antioxidant characteristics help protect the hair and hair follicle and prevent oxidative damage. The anti-inflammatory properties help relieve existing damage.
Mitochondrial support is linked to better metabolism and energy production, as well as cell longevity. This includes the regenerating cells of the hair and hair follicle.
The microbiome-related activity works by increasing microbial diversity and suppressing opportunistic pathogens such as Staphylococcus aureus, Malassezia furfur, and Candida albicans.
A greater diversity of beneficial microorganisms creates a healthier and more balanced environment in the scalp and hair follicle where hair grows. The combined effects support the findings of higher hair density, reduced hair loss, and overall scalp health.
A topical and edible hair care ingredient
There is growing consumer demand for clinically supported beauty-from-within products as well as topical solutions. This ingredient is positioned for both areas.
It is an edible topical active ingredient, and its food-grade twin is branded as ThymoQuin. The same ingredient can be used in formulations designed for beauty from the inside and outside.
One example is a hair oil containing the ingredient in a drop bottle for both topical and edible use. Consumers can massage the drops into their scalp or hair strands and can ingest the ingredient orally.
There is currently no head-to-head comparative study on the ingredient, so a direct comparison with existing scalp health or hair growth ingredients on the market cannot be made. Its differentiating factor is described as a holistic approach that supports hair health from multiple perspectives.
Compatibility with cosmetic formulations
The company behind the ingredient specializes in proprietary extracts and standardized cold-pressed black seed oil, Nigella sativa. The ingredient can be used in a range of formulations, including creams, lotions, gels, serums, oils, and advanced active cosmetic formulations.
Findings related to dandruff and seborrhea
A previous in vitro study on a 5% scalp serum showed efficacy for seborrhea, dandruff, irritation, redness, and itchiness.
The 28-day study examined symptoms of mild to moderate seborrheic dermatitis in adults. Topical use of the serum resulted in significant improvements from baseline in scalp irritation, erythema, itchiness, scaling, and overall scalp health. It helped reduce scalp oiliness as well.
The formulation containing 5% standardized black seed oil may have the potential to inhibit the overgrowth of opportunistic pathogens. This could support maintenance of a healthy skin microbiome and help modulate symptoms in people prone to seborrheic dermatitis and dandruff.
The clinical study concluded that it may represent a safe and effective alternative to conventional antimicrobial preparations currently used for seborrheic dermatitis, skin and scalp discomforts, and disorders.
