Amino acids and vitamins can be produced internally by your plants own systems, but supplementing these with your base nutrients has shown to increase plant health and yield. This is because your plants can spend less of their energy developing amino acids and vitamins, and focus that excess energy on growth. Humic and fulvic acids are becoming more popular, especially for grower's using inert media like coco coir or lower quality soils low in natural humic/fulvic acid. These complex acids have been shown to increase nutrient uptake and mobility, improve buffering capacity and cation exchange and help support beneficial bacteria's.