Here's
one of them, there have been quite a few.
This isn't really the type of study you'd use a control arm in. All participants fasted for 4-6h beforehand. There was another one that fed all participants the same meal and had them fast 6h before coming in (which is better design) and that showed the same thing.
Imagine being "hungry" after "fasting" for 6 hours. That's why interval fasting works - it mainly motivates people to not stuff their faces for a couple of hours, which makes them consume less calories than they normally would.
It's sad that we have people who believe they can't go without food for 24 hours, or "have low blood sugar" after not eating for 2 hours. No kidding, your blood sugar drops after a while, and that's where your body begins to access all those previously stored calories.
I strongly encourage anyone struggling with food addiction to not eat for 24 hours, only drink water. This is important so you'll learn to deal with the discomfort of actually feeling hunger instead of cravings, and that you understand that nothing bad will happen to you if you don't eat for a bit.
In fact, drinks are the first thing to change (as someone itt already pointed out): drop any and all drinks but water or tea. It's an important step to reduce calorie intake, and it will help your body wean off the cravings for sweet, sugary taste, which is why I'd recommend to not switch to zero sugar or light options. Just water or tea.
Source: I stopped smoking a couple of years ago and I'm a sober alcoholic for 5 years, during which I also lost a considerable amount of weight because I learned self-control and how to endure unpleasant bodily sensations. You can, too, OP, despite being a whiny individual who didn't make it through their kiwifarms hazing
Edit: Added a sentence or two.