Black salt, also known as kala namak, is a popular ingredient in South Asian cuisine and traditional medicine systems such as Ayurveda. Its use in supporting or treating menstrual irregularity is primarily rooted in traditional practices rather than modern scientific evidence. Ayurvedic texts sometimes recommend black salt as a digestive aid and as a means to balance bodily "doshas," which are believed to influence overall health, including menstrual health. Folk remedies may suggest that black salt, often consumed with herbs or in various home preparations, can help with bloating, digestive issues, and the regulation of menstrual cycles. However, these recommendations are based on centuries-old beliefs and practices rather than systematic clinical studies.

Scientifically, there is minimal evidence to support the efficacy of black salt in treating menstrual irregularity. Most of the available research on black salt focuses on its mineral content (such as sodium, iron, and trace minerals) and potential benefits for digestion. There are no robust clinical trials or peer-reviewed studies directly linking black salt consumption to improved menstrual regularity or hormonal balance. Therefore, while its use persists in traditional medicine, the evidence for black salt's role in treating menstrual irregularity is weak and primarily anecdotal.