8659
The results of the study demonstrated an inverse relationship between magnesium intake and depressive symptoms , which persisted even after adjustments for sex , age , body mass index , monthly expenses , close friends , living on campus , smoking ( current and former ) , education , physical activity , and marital status .
 magnesium
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 magnesium