Inadequate dietary intake can never induce depression and/or anxiety but there is an important relationship between diet and depression.
Nutritional care of depressed (and/or anxious) people needs much attention. Depression may cause loss of appetite and interest in eating. To comply with the nutritional care plan, proper motivational techniques should be used to reduce the chances of (specific) nutrient deficiency.
Please go through the different dietary components listed in the menu to be able to understand the link between diet and depression and anxiety better.