Most Americans don't get the RDA of about 0.4 gr. Very important and few side effects. Doubly absorbed when chewed in oily food. An old term that shouldn't be lost. Most but not all people get enough or too much n-6.
Minerals are complicated because there are so many and it is possible to overdose.
Research is limited and one's intake depends on the degree of food processing and amount in the soil. Plants make vitamins but must mine their minerals. Here's a US Nat. Inst. of Health link. No deaths from foods or supplements are reported.