Peter Thomas Roth

Peter Thomas Roth is an American prestige skincare brand, founded in 1993, sold through its own website and major retailers including Sephora, Nordstrom, and Amazon. Its Irish Moor Mud Purifying Black Mask is one of the brand’s signature products — the company describes the mud as hand-harvested from the Irish countryside and among the highest in organic content of any moor mud, used to purify pores and hydrate skin. Among the brands in this directory, it is the clearest example of peat-based skincare succeeding in mainstream prestige beauty retail rather than niche or spa channels.

Peter Thomas Roth is an USA brand built around moor mud.

Peat — the organic sediment itself — is used in treatments like peat balneotherapy, peat body wraps, and peat mud pack, most often explored for psoriasis, back pain (chronic low back pain), joint inflammation (osteoarthritis, rheumatic conditions), and eczema (atopic dermatitis). See our evidence library for the studies.