Humic acid is a middle-weight organic substance extracted from ancient compost piles. Millions of years ago, during the Carboniferous Period, massive amounts of vegetation covered the earth. Over the millennia, layer upon layer of decomposing vegetative matter was covered and compressed into what we now know as fossil fuels. In the process, a mineral was formed called “leonardite”, a soft organic material with highly-active carbon compounds locked in its crystalline matrix. Through a process called alkaline hydrolysis, the organic compounds are unlocked and extracted from the leonardite as humic acid.