Inflammation is a bad for your body, which is why a lot of keto and vegan users end up a lot healthier than old school heavy carb and calorie loaders that ate like 7 stack cheeseburgers with 3000 fries.

Carbs in particular drastically increase your inflammation so eliminating as much of them as possible will help your body stay stronger as you age. Doesn't mean that can't have them but maybe keep the sodas and beers down.

Physical effects of stress do strain your heart as well and this is fairly well documented.