Hair loss due to stress and diet

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Has anyone experienced significant hair loss due to stress or diet?
Over the past 6 to 8 months I have experienced off and on stressful events. I would categorize the stress level as significant. During these stressful months, my diet has been poor, and my exercise routine stopped.
In the last 2 - 3 months, I have experienced significant hair thinning and shedding.
Does anyone have any comments or experience with this?