If I'm reading https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3585765/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3585765/ correctly then it says that the maxim

If I'm reading https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3585765/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3585765/ correctly then it says that the maximum listed dosage is safe but the FDA recommended lowering it with no supporting evidence. It claims the previous higher maximum was anecdotally established but later supported as safe by multiple studies and the reason for the article seems to be concern that the new lower maximums could cause confusion in patients and doctors.