This is probably the least discussed topic when it comes to skin aging, I think that subcutaneous aging is the #1 giveaway of any person real age, regardless of how much they take good care of their skin.
We've all seen young people with heavily wrinkled and sun damaged skin, yet, somehow we were still able to tell age group they belong to, the same can be said about older people with clear wrinkle-free skin, those folks still looked their age regardless of how perfect their skin condition is.
I've been looking for clues for months on how does subcutaneous aging form and how to prevent it, but found little to no information, does anyone here know what does specially trigger the fatty skin layer aging? is it oxidation, or is there something else? and if it was oxidation, do fat-soluble anti-oxidants prevent or slow down the aging process of that layer?
Of course, there is also the bone loss issue, but this usually occurs in much more advanced age than -say- 30 years old.