The history of the thermal basin of San Giovanni has ancient origins. It’s thanks to the first inhabitants of the area the discovery of the benefits of this unique part of the sea, a shallow basin surrounded by a strip of land that separates it from the open sea of ​​the Gulf of Portoferraio and Carpani, now a natural reserve. Since the end of the nineteenth century the sludge collected here were used as a traditional remedy in poultices to treat joint pain. Following these empirical uses, are initiated studies on marine mud (silt) taken from the above mentioned area. The results were amazing, so much so that the Ministry of Health, after appropriate investigations, recognized the mud of the Basin of San Giovanni SPA, therapeutic properties. In people treated with mud taken from the basin of San Giovanni SPA, in fact, the skin took on a better appearance and muscles became more toned. University studies have clarified that the mud contains a percentage of the organic part of 6-14% due to the maceration of algae and marine plants indigenous to the basin that washes up over the years, had developed hydrogen sulfide. The algae and marine plants of the San Giovanni basin are CAULERPA PROLIFERA and ZOSTERA MARINA that grow here spontaneously there and are manually collected and allowed to dry in the sun, to be subsequently processed by a method completely natural. These plants and marine algae contain: iodine, sulfur, minerals, vitamins, proteins and alginic acid. The active ingredients improve the hydration of the epidermis, contribute to the reactivation of peripheral blood and lymphatic circulation, for the action antiseborrheic are effective in the treatment of seborrhoea of ​​the scalp and oily skin in general, for the high iodine content contribute to the metabolism of subcutaneous fat (cellulite), also help fight osteoarthritis, to eliminate fatigue, help to make the skin supple and soft, fight stress. That’s why the seaweeds of this basin are so precious in their cosmetic and health utilization.