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The role of thermal spring waters (TSWs) in the treatment of dermatological disease has been described by several authors, as have their benefits in treating certain skin conditions, among which atopic dermatitis, contact dermatitis, seborrhea, seborrheic dermatitis, psoriasis, acne, rosacea, and sensitive skin can be cited. It has been postulated that the mechanisms involved include chemical, thermal, mechanical, and immunological effects, and the chemical composition of thermal water is crucial in its skin effects. Thus, in this review, the effects of the different anions, cations, trace elements, and other compounds present in TSW were investigated, showing that the benefits of TSW can be mainly linked to its content of chloride, sulfate, and bicarbonate anions; calcium, sodium, and magnesium cations; and, among its trace elements, boron, selenium, strontium, manganese, and zinc, which are those with greater influence. Other compounds such as SiO2, sulfur anions, and CO2 can also exert specific effects. As a whole, the specific effects can be summarized as anti-inflammatory, antioxidant, wound healing improvement, skin hydration, and skin barrier recovery activities. [ABSTRACT FROM AUTHOR]

Featured Application: This review deals with the use of nutribiotics in skin care, which is of great interest as a nutritional supplement therapy in skin dysbiosis and related diseases. The study of the human microbiome has been a hot topic during the recent decades. More recently, the skin microbiome has attracted great interest as well. So, the scientific community has become interested in the role of the skin microbiome in skin health and its relationship with different disorders, such as atopic dermatitis, psoriasis, acne, and rosacea, among others. Numerous studies and investigations have been performed to study the role of pre- and probiotics as nutraceuticals in the treatment of skin diseases, with growing evidence over the recent ten years. This review gathers information on the use of "nutribiotics" in skin care health, focusing on the main dermatological diseases and other skin conditions. Clinical studies show that nutribiotics could be a new tool to improve skin health, and pre-, pro-, syn-, post-, and para-probiotics seem to be beneficial for several skin disorders as well as for repairing the skin barrier and promoting wound healing. In conclusion, the skin microbiome has become a new field with great potential to develop innovative products to manage skin health and diseases. Future advances in this field may facilitate the treatment of skin dysbiosis, with nutribiotics being a suitable method for skin care. [ABSTRACT FROM AUTHOR]