I had this. Around 42 I seemed to age overnight. Quite shocking as up until then I'd always looked quite youthful and made a real effort to remain so. I noticed that my skin just looked awful and it had lost that lovely glow and plumpness and my eyeshaddow & base just wouldnt go on like it used to.
I started taking care of myself, no alcohol, sugar, late nights, etc.. started drinking LOTS of water, exercising, early nights, eating right. Plus, the treatments. Oh god, I must have spent a fortune on teeth whitening, crowns, eyelash extensions, peels, lasers, Radio Frequency (RF), CACI, IPL, facials, botox, fillers, the list is endless.
I think if you stay slim, look after your skin and hair, you're halfway there. It's really hard though and made harder by peri-menopause (kicks in anywhere up to 10 years before actual menopause), so be warned.
Ageing seems to happen in spurts like growing when you're young. It's not a gradual process from my experience and that of friends and family. I'm dreading 50!
I think I'm a few years away from a face-lift/neck lift but when the treatments no longer work, I'll be there at the surgeon's office.