Conclusion
Black seed oil is commonly used as a supplement in alternative medicine and has long been thought to have several health and beauty benefits. Studies show that there is some truth to some of these benefits. While more research is needed to fully understand its effectiveness and dosages that are appropriate for use, moderate use of this oil is fine but you should speak to your doctor first.
References:
[1] https://pubmed.ncbi.nlm.nih.gov/21675032/
[2] https://pubmed.ncbi.nlm.nih.gov/25706772/
[3] https://pubmed.ncbi.nlm.nih.gov/25847566/
[4] https://iopscience.iop.org/article/10.1088/1757-899X/259/1/012018/pdf
[5] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4387229/
[6] https://pubmed.ncbi.nlm.nih.gov/28093815/
[7] https://pubmed.ncbi.nlm.nih.gov/28093815/
[8] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5898665/
[9] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5898665/
[10] https://pubmed.ncbi.nlm.nih.gov/31572186/
[11] https://pubmed.ncbi.nlm.nih.gov/23707331/
[12] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3691594/
[13] https://pubmed.ncbi.nlm.nih.gov/25847554/
[14] https://www.sciencedirect.com/science/article/abs/pii/S0963996915000459
[15] https://pubmed.ncbi.nlm.nih.gov/26029855/
[16] https://pubmed.ncbi.nlm.nih.gov/23436437/
[17] https://pubmed.ncbi.nlm.nih.gov/26029855/
[18] https://www.sciencedirect.com/science/article/abs/pii/S0963996915000459
[19] https://pdfs.semanticscholar.org/16b4/35d3ff24c2cc39712068660ad55b38f84a7d.pdf
[20] https://pubmed.ncbi.nlm.nih.gov/26633317/
[21] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5735686/
[22] https://pubmed.ncbi.nlm.nih.gov/23198836/
[23] http://www.sciencedirect.com/science/article/pii/S2352241015000286