| http://www.w3.org/ns/prov#value | - Today we know that these effects are the result of seratonin (feel-good substance) and melatonin (sleep substance) imbalances in the hypothalamus (region of the brain regulating metabolic processes).The most common symptoms are lack of energy, low self-esteem (in extreme cases, suicidal thinking) and lack of interest or enjoyment in activities.
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