There was an extensive study(far more extensive than any other nutrient/additive on the market.) In short they concluded that it sped up plant emergence, plants bloomed faster(shorter flower time), and plant productivity even sped UP to 91%(depending on the flowers tested; they did not test on cannabis) but all plants benefited ranging from 5-21% increased yields. Not enough info to assume that you can back down on phosphorous as they claim it increases the plants intake of phosphorous not just bio-availability. They say it acts as a plant growth hormone, when humans take hormones or steroids to bulk do we try and intake less protein and other macro/micro nutrients? we do not, as we know it will hinder our recovery/potential gains. Yes we are very different from plants but hormones are hormones. Here is the source, couldn't be more happy that a nutrient company actually got their product tested, hopefully this starts a wave of credible tests of nutrients and additives.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4911952/
Overall,
Mammoth P™ inoculations facilitated superior plant emergence, faster blooming and plant productivity across a wide range of crop species. Our results suggest that microbial metabolites may play a crucial role in controlling plant growth and that the microbial community might be controlling plant development in a variety of ways. These results indicate the vast potential for future development of consortia-based inocula to transform agriculture.
