You "just" need to eat better food. It's that easy.
Well, here I'm not telling lessons, because I fail to "just" eat better food. In fact eating it is the easy part. Getting good food in your plate everyday is what is hard because it means making a lot of changes in your habits because, well, food is not going to cook itself and you always have "better" things to do.
So, yeah, you can lose more than that, but it's probably not sustainable by someone who loves to eat.
Source: experimented a fair amount with dieting/fasting in my 30s. When you talk about this with people, it’s startling how many believe that skipping some meals is dicing with death. Hardly surprising people struggle to lose weight, when they refuse to try changing the key variables
100g of fries is about 250kcal, 100g of cabbage is around 30
You can quite literally eat 10 times as much cabbage as fries to have the same amount of calories
And eating less triggers a feeling of hunger (at least at the beginning), which makes following through harder.
Cookies, chocolate, etc. easily exceed 500kcal/100g.
Beer is a serious calorie input too.
Hahahaha, this, yes.
Last summer during a whole company offsite we happened to play some quizz game where you had to give the nearest answer. One question was « How much time could you survive without eating anything except water ? ».
Boy did I won this guess by trying a random « 30 days » because I knew world records are amounted in months. The other answers were all, without exceptions, around 2 to 3 days and nothing more than a week.
Fix habit enough that you don't gain weight first, and get used to that being new normal, then start dropping, else it is very easy to bounce back.
Then, once you figured out how to live and eat "post weight drop", start actual drop, and if you bounce it won't be as hard