Fulvic acid

Fulvic acids are a family of organic acids, natural compounds, and components of the humus (which is a fraction of soil organic matter). They are similar to humic acids, with differences being the carbon and oxygen contents, acidity, degree of polymerization, molecular weight, and color. Fulvic acids remain in solution after removal of humic acid from humin by acidification.
Fulvic acid is created in extremely small quantities under the influence of trillions of useful microbes, working on the decay of plant matter in a soil environment with sufficient oxygen.
Fulvic acids cannot be readily synthesized because of their extremely complex nature, although lignosulfonates from the paper industry can appear similar to fulvic acids in certain tests as discussed below.
At the same time, the main problem is not extraction, but subsequent purification, in particular, the breaking of the molecular bond with Cl and Fe, which together with FA form toxic dihaloacetonitriles and have the property of accumulating in the body before reaching the critical point.