Do extreme mental stress and bathing once in 7 days will always or in some particular cases lead to hair loss or hair whitening?

No, not nessecarrily: Reasons to gray early. 1. Genetics. 2. Age 3. Stressors. The age of initial graying is largely a matter of genetics. However stressors such as nutritional deficiencies, traumatic head injuries, low vitamin B levels, zinc deficiency, severe illness, surgery and marked emotional stress may impact earlier depigmentation in people who are already predisposed to gray hair. In general – genetics plays