To stay healthy we need 'A' regular lifestyle.
Of course what we eat 'and' (chyba miales na mysli IS) also very important.
Eating the rigHT 'foods' (tutaj ja dalabym food) and the right amouNts of food can help you live a longer, healthier life.
Eating healthy foods 'we should became' SHOULD BECOME our habit. We shoulD avoid eating TOO many sweets, because they can cause obEsity.
To keep OUR BODY healthy 'our body' (niepotr) WE should be fit, so taking up some sports would be A great possibility to stay fit.
If we play some sport, out immunity SYSTEM is so much stronger than 'people`s' (uzylabym THOSE people) who don`t do any exercises. I really recommend to you such A healthy and balanced lifestyle.