My doctor always says “There are three little things that will give you the best chance at living a long and healthy life. Eat a little better, move around a little bit, and get a little more sleep”
Alas, the easiest advice is the hardest to follow short term but the best to do long term.
Eat fewer calories. Consume as little added sugar as possible.
You don't have to eat much better. You can trivially supplement. It's far more important to eat less.
Its even better to have a government pension that sends checks to your address as long as you are alive.