Thoothuvalai or Purple Fruited Pea Eggplant is a thorny creeper with bluish violet flower, more commonly available in Southern India has been used traditionally in Siddha system of medicines to treat various diseases. ... Thoothuvalai Rasam /soup and Thuvaiyal are some of the popular culinary usesof this herb. Thoothuvalai is an ancient herb, extensively used in siddha and ayurveda to cure various ailments. Thoothuvalai is a time tested remedy for asthma, cold, sinus cough, lung diseases and flu. Prevents throat infections, reduces throat irritation and improves appetite.