GT Nutrition - GreenMyst Humic contains pure and highly active compounds formed from the natural decomposition of plant materials over thousands of years. The peaty swamps of Florida are the source of the finest and purest humates, as used in GreenMyst Humic. It's is a biologically complex solution, which contains both Humic and Fulvic acids. These highly active compounds have various roles in soils, as well as in the plant itself. Humic substances promote the conversion of a number of elements into forms available to plants.