“Can obesity be fixed with a diet?”

For some, just by cutting out carbs and focussing on protein and healthy fats can help. For many, it requires more than that. If you have followed a diet of getting enough protein and have cut out sugar, wheat, fruits with too much sugar (if you can make a juice out of it and it tastes delicious there is too much sugar) and vegetables with too much sugar (best ones are the green ones grown above ground) and have lost weight/percent body fat then you are one of the lucky ones. If not, then I suggest finding a bariatric physician in your area to help by going to: https://obesitymedicine.org/find-obesity-treatment/ and they can help with medications, if necessary, to help.