The earth's soil is naturally filled with fulvic acid, which is produced by a process of microbe microbial decomposition of plant matter.  The nutrients and minerals in it can be absorbed quickly and easily because it's bioavailable. Those with digestive issues will especially benefit from this. Also, it promotes a healthy immune system and counteracts free radical damage. Fulvic acid is difficult to come by in a standard diet as the soil is being depleted more and more. Additionally, we tend to interact less with dirt and live-in a cleaner, more sanitized environments than our ancestors.