Preliminary evidence of effectiveness of preparations from Nigella sativa and its leading compound thymoquinone in periodontal therapy.

A systematic review found 14 clinical trials showing that *Nigella sativa* preparations and thymoquinone improved periodontal outcome measures when used alongside standard treatment, though evidence quality was limited by small studies, methodological variation, and inadequate reporting of doses.

A plain-English summary of the study's own findings — we don't add our own claims or interpretation. Read the full paper for the complete methods and results, and apply your own clinical judgement.