You know, I could have written this, although I'm almost 40 and it feels like all the symptoms you mentioned just crept up and suddenly, boom
I'd like to say what helps, but, sadly not much. I have since January been taking, biotin, bovine collagen peptides, high does of iron as I'm low in it, and vitamin every day. I drink my weight in water, good diet of eggs, tuna, salmon, spinach - those kinds of foods, I use retinol daily, and use expensive skincare/hair care etc. I cycle hard 30 minutes a day and sweat buckets and enjoy a shower exfoliation, body oil for moisture etc
I cant say I've seen a whole lot of difference from that, hair still crap, thin and slow growing as always, skin ok but have dark circles under eyes and corners of eyes, no real glow. No change to skin in general.
I've stepped it up now, powder brows tomorrow, hairdressers next week, and I'm undergoing tattoo removal (two sessions in and a way to go hence the diet/exercise etc)
I think only botox/filler and facelift is going to fix the face real;istically, and maybe a wig !