Because some programs are unhealthy.
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Related: unhealthy
Prev: But whereas a change in your diet to, for example, eating unhealthy foods will soon be noticeable in your skin, changes to your hair will take a lot longer.
Next: Dr. Brewer, an expert at the University of Liverpool said "Judgement of attractiveness is often unconscious, hut we all do it, and we are able to judge on even son thing small like whether someone looks tired or unhealthy."