>>41604460 (OP)
If you start late you can reverse about 10 years of your body's age. It is expensive and time consuming and requires you to actually put in effort.
Get on an age reversal supplement program, look into nad and nmn, just ask chat gpt to make you a program
You need to start using lotions and sunscreen asap. Depending how bad your skin is you may need a multi step program. Again just ask chatgpt, look into things with urea, glycolic acid, retinol
You need to have your mitochondrial functions checked and make sure your body can actually use the fuel you're giving it.
If life allows it, do a thru hike of a very very long trail 5+ months, AT, PCT, CDT. This will permanentely rewire your body to store fat and burn energy differently than people that have never done this.
Get a sauna.
Do this over a few years and you will be biologically 10 years younger than you are today.