Evidence supporting the use of: Black Seed Oil
For the health condition: Hair (loss or thinning)

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Synopsis

Source of validity: Traditional
Rating (out of 5): 2

Black seed oil (Nigella sativa) has a long history in traditional medicine systems, particularly in the Middle East and South Asia, where it has been used for a wide range of ailments, including supporting hair health and combating hair loss or thinning. The oil is prized in Unani, Ayurveda, and Islamic medicine, often being applied to the scalp or mixed into hair products. The traditional rationale is based on black seed oil’s reputed anti-inflammatory, antioxidant, and antibacterial properties, and its association with improved scalp health, which is believed to promote hair growth and reduce hair loss.

Scientific research into black seed oil’s effects on hair loss is limited. A few small-scale studies and animal models have suggested that thymoquinone, the main active compound in black seed oil, may have positive effects on hair follicle health and could potentially reduce hair shedding due to its anti-inflammatory and antioxidant actions. One small human trial found a topical combination including black seed oil improved hair density in people with telogen effluvium, but the study design does not allow a clear attribution to black seed oil alone. Overall, the evidence base remains weak, with most support coming from tradition and anecdotal reports rather than robust clinical trials.

In summary, while black seed oil is traditionally used for hair loss and thinning, the current scientific validation is limited and of low quality. Better designed clinical trials are needed to clarify its efficacy and safety for this application.

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