I too have noticed the trend of people looking younger after being hrt. While, I am not discounting the possibility of biological hormone influence, I have not noticed similar younger appearance from cis-women or men. I think that effect is likely attributable to the reduced stress, anxiety, and depression that occurs as we become who we want to be. Also, for transwomen, at least, there tends to be an increase in self-care, e.g. skin care routines. This is also likely attributable to the reduction in dysphoria and the increased appreciation of our bodies.
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