Again, the colloquial word "fulvic acid" needs to be corrected, in this case it is also a group of compounds, so the correct name is "fulvic acids".
Fulvic acids work very similarly to humic acids. However, fulvic acids are better able to adapt, adapt. Their molecular structure allows them to exert their positive effects where and where they need to be. Fulvic acids act sometimes as antioxidants and sometimes as electrolytes, but they are still able to transport nutrients, hydrate, catalyze enzymes, stimulate metabolism, improve absorption, and bind to heavy metals.
In soil, fulvic acids regulate pH, promote germination, improve plant respiration, promote chlorophyll synthesis and root growth. In the presence of fulvic acids, plants are less prone to wilting and better withstand weather stress. They improve their drought tolerance, become more resistant to insect infestations and can neutralize the effects of herbicides.
Source:
https://huminsav.info.hu/