02/04/2026
Menstrual blood is biologically distinct from circulating blood, and research has begun to explore those differences. A 2012 proteomic study found that menstrual fluid contains a wide range of proteins, some of which are not typically detected in standard blood samples. Many of these proteins are linked to tissue remodeling, immune activity, and cellular repair, reflecting the uterus’s monthly cycle of breakdown and regeneration.
This supports the idea that menstrual fluid is not simply “waste,” but a complex biological material. Scientists are still in early stages of understanding its properties, and while there is interest in potential applications in reproductive biology and regenerative research, much more study is needed before drawing medical conclusions.