Transdermal Mineral Delivery

Transdermal mineral delivery is a mechanism where minerals chelated by humic and fulvic acids are absorbed through the skin during peat application. The organic acid-mineral complexes are more bioavailable and more readily absorbed than free mineral salts due to their organic carrier.

Mechanism

Fulvic acids (low molecular weight, soluble at all pH values) are the primary mineral carriers. They form stable but bioavailable complexes with trace minerals, carrying them through the lipid layers of the stratum corneum. The sustained contact time in balneotherapy (15–30 minutes immersion) and the heat-enhanced skin permeability maximize absorption.

Minerals Delivered

Iron (tissue oxygenation, collagen synthesis), zinc (wound healing, immune function), magnesium (muscle relaxation, enzyme function), manganese (antioxidant enzymes), and calcium (cell signaling). The specific mineral profile depends on peat source and geological origin.

Evidence Quality

Transdermal mineral absorption from bath preparations has been demonstrated, particularly for magnesium. Evidence specific to peat-mediated mineral delivery is limited but supported by the known properties of fulvic acid-mineral complexes and transdermal absorption studies.