Also the effect of "detoxing" from those sugars and alcohol is pretty sick. Like I used to drink a LOT (4 days a week with atleast 2 beers up to 20+ from my 18th up to my 22nd and from then on a little less
). It's only from when I started to train seriously (like 1.5y ago) for later I realized that I needed to change my diet aswell. I wanted to change my health before I was going to work otherwise I wouldn't have the perseverance to continue fighting my own body
In the beginning you feel getting down a lot and not enough energy. You are fatique and I think I definately tasted beer in my mouth a couple of times lol, but there was a change point where everything got better and I felt way better / more energized and don't have that "oh yeah let's grab a beer" feeling anymore and you lose a lot of weight. With my fitness I started at 82kg and first wanted to get muscles (easier to lose fat) so went up to 89kg and I'm now at 79.5kg with around 70% of those muscles/strength I had at my peak.
I will still drink alcohol obviously, but I can not keep up with some friends anymore and will have to stop quite early. Eg. new years eve I had to quit after 2 beers, because I already started to get drunk lol.