I was trying to hold out to mid thirties at least but my fine lines are bothering me a lot more the past year.
Happy with my skincare routine now, and use very high SPF.
I previously had bad acne which caused atrophic scarring and feel like that maybe depleted collagen at a faster rate. Also, because of my acne it took me ages to find a spf that didn’t make my skin feel greasier or break me out so I only started wearing spf daily from 26 (much better spf formulas now than 10+ years ago)
Have a balanced diet but admittedly used to be a heavy drinker until late twenties. Still drink now but more conscious and rare that I exceed over 10 units a week.