Black Mustard (Brassica nigra) has a long history of use in traditional medicine systems, such as Ayurveda and Unani, for various ailments, including liver disorders and jaundice. In these traditions, black mustard seeds have been employed as a stimulant and as an agent believed to enhance digestion and promote bile flow, which was thought to be beneficial for jaundice. However, there is little direct scientific research supporting the efficacy of black mustard specifically for the treatment or support of jaundice in adults.

Most references to black mustard for jaundice are found in ethnobotanical and historical texts, rather than clinical or pharmacological studies. The evidence is largely anecdotal, and the mechanisms by which black mustard might influence liver function or bilirubin metabolism are not well understood. Furthermore, contemporary medical literature does not recognize black mustard as a validated or standard treatment for jaundice, and there are potential risks associated with its use, such as gastric irritation or allergic reactions.

In summary, the use of black mustard for jaundice is primarily justified by traditional practice rather than scientific validation, and the quality of evidence supporting its use is weak.