What is humic acids?
Humic acid is a mixture of natural organic macromolecular compounds. Widely found in nature, the proportion of humic acid in soil is the largest. Soil humic acid is a physicochemical heterogeneous complex. The molecular weight of the mixture is polydisperse. The mixture is natural, high molecular weight, yellow to black, amorphous. It is composed of a colloidal, fatty and aromatic organic polyelectrolyte and cannot be represented by a single chemical structural formula.

What is Fulvic Acid?
Fulvic acid supplements consisting of a neutral pH are very weak fulvic compounds and do not deliver the benefits of free form fulvic acid (fulvic acid that remains unreacted with other substances or unboundto minerals) that exhibits a much higher concentration and lower pH[citation needed.

Fulvic acid branded as “ionic” is not free form fulvic acid, more accurately they are fulvic compounds or fulvate salts.

According to the International Humic Substances Society all fulvic acids are colloids.

What is the function of humic acids to plant?
The role of humic acid in plant growth is not only to change its physiological characteristics and external morphology, but also to improve plant stress resistance by regulating the plant growth environment. Let us take a look at the details of role of humic acid in plant growth physiology.