As of 2011 data, 45 percent of American adults do not get the recommended dietary allowance amount (RDA) of magnesium from their diet. Teen statistics are even more dire. Data published in 2014 suggests nearly 92 percent of teens aged 14 to 18 do not meet the estimated average requirement for magnesium from food alone — likely because they do not eat fresh vegetables on a regular basis.
The Sure-Fire Way to Tell If You're Magnesium-Deficient
https://www.youtube.com/watch?v=_OkrPpi0h_k
Read more at https://www.lewrockwell.com/2017/09/joseph-mercola/dont-risk-deficiency/.