I'm 49 and have always been an 8-10 though now firmly a 10, at least for trousers. Still an 8 on top.
I have never been a big drinker but since the start of perimenopause a couple of years ago I very seldom can't drink, so now probably have a glass of wine every 2-3 months (in a restaurant, for example).
I cook nearly everything from scratch, and try to avoid UPF, though am not too absolutist about it. I try to avoid foods that I regard as messed around with, such as flavoured yoghurts, would never buy anything marketed as low-fat or low-sugar and never really snack between meals (I'm pretty greedy at mealtimes and like proper food, but don't see the point of snacks).
I usually have either porridge or homemade granola for breakfast, with either blueberries or banana and organic milk (in glass bottles from the milkman!).
Lunch is usually soup, or eggs in some form, or hummus and veg, followed by a piece of fruit, or occasionally full-fat Greek yoghurt with a few nuts and teaspoon of honey swirled through. I make my own soda bread so sometimes a slice of that toasted forms part of my lunch.
Dinner is just a normal family meal - stir fry with salmon, pasta with a sauce and salad on the side, curry, risotto or something like that. My elder DD is a vegetarian which means I do cook a fair bit of vegetarian food.
My weakness is homemade cakes and puds, and I do have to really keep an eye on this. I bake a cake most Sundays - lemon drizzle today - and try to make us eke it out for the start of the week. Sometimes later in the week I'll do a crumble, or rice pudding, or baked apples. Or bake a batch of shortbread and have a square of that after dinner.
In terms of drinks, I dislike fizzy drinks and don't ever buy fruit juice. I have 2-3 cups of cafetière coffee a day, lots of water, and a cup of rooibos tea in the evening.
I'm not keen on exercising (lazy) but do walk most places, and try to force myself out for a run now and again - my ideal is 2x a week, but I'd be lying if I said I always achieved that. Sometimes I do short 10-15 minute YouTube exercise routines.