...keep our bodies fit and live healthy...
Civilized lifestyle is forcing everybody to work so much more efficiently that it is totally unhealthy, civilized disease such as depression, sleep deprivation, work life balance. I know boss love to shame about how youth are lazy, they just want to blame everything else for their own fault. They should look at the mirror and reflect themselve, how people used to work a 9-5 and one guy could afford a full family, which is totally unheard of to zoomers.
...limiting certain foods is really not recommended...
In fact, taking too much food is not healthy too, there is no study would support eating a lot of food or suggest you to how much food intake is great for a person, in fact we should consume as little foods as possible, too much foods is bad to your body, because your body would need to work hard to digest the food, when your food is bad and you eat plenty of them, you are just double down on killing your body digestive system by forcing it to work hard and digest a lot of junk food, what do you think would you got? You would get kidney failure, colons cancers and all sort of digestive system disease.
My wisdom is too eat as little as possible, but also take a lot of sleep, you won't need a lot of food when you sleep a lot more, it is very scientifically proven fact. you can sleep 12 hours a day, when you are sleeping, you are helping your body greatly, it is important to note your bowel only start to move shit around when you are sleeping, and by the time you wake up you immediately feel like going to shit because that is exactly how detoxication work during the sleep, if you don't get plenty of sleep, the reverse would be true, the shit keep building up in your bowel and not moving, disease slowly build up, and all sort of sickness would come to haunt you quickly. Also when you sleep a lot, you won't feel as hungry as fat guy craving for xxl size burger, since you save a lot of energy on sleeping, your body do not need so much energy from food, thus doesn't get hungry and craving food like mindless zombies.
...growing their own plants that...
It may help if you have the required know how and are passionate about growing the best crops.
But honestly you won't be able to find a lot more improvement from the crop. People like to boost about how their food are better and healthier than the existing food, you are looking at may be 0.1% of gain or less, a typical beef and wagyu beef are very much the same beef and meat, but a wagyu beef could fetch 100x more price than normal beef, do you really believe wagyu beef has 100x better than a typical beef?
Unlimited growth potential on a piece of beef meat? Nope, wagyu beef might be just 0.5% better than typical beef when it come to chemical composition, there is exactly the same except a lot of hype and mark up price.