Humboldt Nutrients HNF410 1-Gallon Flavorful Solution Flavorful is a strong solution of 8 percent refined humic acid concentrate, a little known and highly useful additive Flavorful is comprised of long chains of organic carboxyl and polyhydroxide acids This organic complex molecule is very active with many open rings, giving it a large capacity to hold and exchange nutritive cations and anion Electrolytes are the key to healthy ion exchanges in plants and animals Flavorful is 8 percent refined humic acid with a dark, amber color indicating the high concentration