Researchers obtained comprehensive questionnaires and digital images from nearly 200 pairs of identical twins. The images were reviewed by an independent panel, which recorded the perceived age difference between the siblings.
Study subjects who had been divorced appeared nearly two years older than their siblings who were married, single or even widowed. Antidepressant use was associated with a significantly older appearance, and researchers also found that major weight gain or loss played a major factor, too.
In sets of twins who were less than 40 years old, the heavier twin was perceived as being older, while in those groups over 40 years old, the heavier twin appeared younger.
The presence of stress could be one of the common denominators that caused facial aging. The researchers also suspected that continued relaxation of the facial muscles due to antidepressant use could account for sagging.