A black, soil-like, nutrient-rich thing that has a complex composition with a bunch of potential therapeutic effects. It has long been used in physiotherapy, rheumatology and sports medicine.
As for skincare, peat has promising antimicrobial activity (thanks to its main components humic and fulvic acid), it's also a mild astringent, anti-inflammatory and even shows some UVB-protective effects. Thanks to these properties, peat has some promise as an adjacent treatment in inflammatory-related skin diseases like atopic dermatitis, psoriasis or rosacea.
Show me some proof
- Wollina, Uwe. "Peat: a natural source for dermatocosmetics and dermatotherapeutics." Journal of cutaneous and aesthetic surgery 2.1 (2009): 17.