Magnesium is a critical mineral in the human body and is involved in ~80% of known metabolic functions. Magnesium deficiency can be attributed to common dietary practices, medications, and farming techniques, along with estimates that the mineral content of vegetables has declined by as much as 80–90% in the last 100 years.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6163803/
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6163803/