"Side effects from increased magnesium intake are not common because the body removes excess amounts. Magnesium excess almost always occurs only when magnesium is supplemented as a medication. Lack of magnesium (deficiency) is rare. The symptoms include hyperexcitability, muscle,weakness, and sleepiness."
" A n e a s y w a y t o r e m e m b e r f o o d s t h a t a r e g o o d m a g n e s i u m s o u r c e s i s t o t h i n k f i b e r . F o o d s t h a t a r e h i g h i n f i b e r a r e g e n e r a l l y h i g h i n m a g n e s i u m . D i e t a r y s o u r c e s o f m a g n e s i u m i n c l u d e l e g u m e s , w h o l e g r a i n s , v e g e t a b l e s ( e s p e c i a l l y b r o c c o l i , s q u a s h , a n d g r e e n l e a f y v e g e t a b l e s ) , s e e d s , a n d n u t s ( e s p e c i a l l y a l m o n d s ) . O t h e r s o u r c e s i n c l u d e d a i r y p r o d u c t s , m e a t s , c h o c o l a t e , a n d c o f f e e . W a t e r w i t h a h i g h m i n e r a l c o n t e n t , o r h a r d w a t e r , i s a l s o a s o u r c e o f m a g n e s i u m . P e o p l e t a k e m a g n e s i u m t o p r e v e n t o r t r e a t m a g n e s i u m d e f i c i e n c y . M a g n e s i u m d e f i c i e n c y i s n o t u n c o m m o n i n t h e U S . I t s p a r t i c u l a r l y c o m m o n a m o n g A f r i c a n A m e r i c a n s a n d t h e e l d e r l y ."
"Because of the important interaction between phosphate and magnesium ions, magnesium ions are essential to the basic nucleic acid chemistry of life, and thus are essential to all cells of all known living organisms. Over 300 enzymes require the presence of magnesium ions for their catalytic action, including all enzymes utilizing or synthesizing ATP, or those that use other nucleotides to synthesize DNA and RNA. ATP exists in cells normally as a chelate of ATP and a magnesium ion."