this is just fucking stupidity
Negative calories is a fucking joke.
These veggies are just low in calories because they are mostly water and cellulose, which the body can't digest. On the internet you can even find such lists containing fruits like tomatoes and pineapples, yeah...
Yes your body might burn 10 extra calories/day if you chew well, but you will still lose fat very slowly or not because your blood insulin is high 24/7. Do you think our ancestors were eating all day? Do you think any ancestral species was eating all the time? No, they were hunting for their prey all day and feasted upon the carcass when the hunt was completed. Stuffing themselves because maybe the next day there wouldn't be anything to eat.
And obviously our digestive system was and still is adapted to that.
The so called starvation mode where your body suddenly thinks that it's smarter to burn muscle mass instead of fat is the biggest crap too (hey fitness suplement producents, here you are again).
There were tests on soldiers (they can be tested legally in inhumane conditions) where they ate at a -5000 calorie deficit. They started losing lean body mass at week 8 when they were at 5% bf. (for those who don't know, see pic)
You need to atleast eat nothing at all for 2 days before your body starts burning muscle
http://fitnessblackbook.com/main/starvation-mode-why-you-probably-never-need-to-worry-about-it/ Come on guys just fucking think. We have evolved from a cell and are now where we stand today. Do you think your body would ignore fat and burn muscle if you didn't eat every 2 hours? Fat is a fucking storage for energy to burn in times of shortage. That's why it's burned much easier than muscle.
When you hear something that sounds like bro science, reflect the idea in an evolutionary point of view for a second. You will find a lot of stupid shit to be easily explained.