Asoka (Saraca asoca) is a well-known herb in Ayurvedic medicine, traditionally used for managing various gynecological disorders, especially those associated with menstruation such as menorrhagia (heavy menstrual bleeding), dysmenorrhea (painful periods), and irregular cycles. In Ayurveda, Asoka bark is believed to have a balancing effect on the female reproductive system and is often included in formulations aimed at supporting menstrual health. PMS Type C (characterized mainly by cravings, increased appetite, headaches, and fatigue related to carbohydrate metabolism) is not a classical Ayurvedic diagnosis, but traditional use of Asoka for menstrual and premenstrual complaints has led to its inclusion in some modern herbal PMS blends.

Scientifically, there is limited direct evidence evaluating Asoka's efficacy specifically for PMS Type C symptoms. Some preliminary studies suggest that the herb may possess anti-inflammatory, analgesic, and uterine tonic properties, which could theoretically alleviate certain menstrual symptoms. However, there is a lack of rigorous clinical trials focusing on its impact on the carbohydrate-related symptoms of PMS Type C. Most support for its use comes from traditional practices and historical texts rather than robust modern scientific validation.

In summary, Asoka's use for PMS Type C is primarily justified by traditional medicine with moderate anecdotal and historical support, but scientific evidence is presently limited and indirect.