Sulfur in dermatological therapy

Review of sulfur’s pharmacological role in dermatological therapy — relevant to peat because sulfur compounds are present in peat and in many of the thermal mineral waters used to mature Central European peloids. Source details for this paper are incomplete — no journal or DOI are on record, suggesting it may be a book chapter or conference paper.

Sulfur’s Dermatological Mechanisms

The review covers three main pharmacological activities of sulfur compounds:

Keratolytic — sulfur softens and dissolves the keratin protein that forms the outer layer of skin. At low concentrations (2–5%) this helps normalise skin cell turnover, relevant for scaling conditions like psoriasis and seborrheic dermatitis. This mechanism is distinct from and complementary to peat’s humic acid-mediated effects on inflammation.

Antimicrobial — sulfur and its derivatives inhibit the growth of bacteria and fungi. The antimicrobial spectrum includes organisms relevant to acne (Cutibacterium acnes, formerly P. acnes), dandruff (Malassezia), and dermatophytes.

Historical use base — sulfur has been used for acne, scabies, seborrheic dermatitis, and fungal infections for centuries. This empirical track record predates the mechanistic explanations and gives some confidence that the effects are real rather than theoretical.

Relevance to Peat

Peat contains sulfur compounds — including elemental sulfur, sulfur amino acids, and sulfated organic compounds — though in lower concentrations than purpose-formulated sulfur treatments. In peloids matured with sulfurous thermal water (common in Central European spa medicine), the sulfur contribution is more significant. For Nordic sphagnum peat used in cosmetics, sulfur is a minor contributor to activity compared to the humic substance and phenolic fractions.