Are there any studies showing how much more you lose with ketosis ?
I'm not too keen on ketogenic diets as I barely eat enough vegetables as it is: I also wouldn't recommend chowing down on red meat as that's going to increase cholesterol so you ought to eat nuts (carbs).
I have a lot of experience on low carb diets, full blown no carb ketogenic diets, along with varieties of fasting. I currently am on a raw vegan diet, and have had extensive experience with it as well.
First off, eating veggies won't harm your ketosis. You can't eat enough salad greens and broccoli to upset that. In fact, you want to eat as many veggies as possible. You'll feel better and be healthier. As long as you stay away from high sugar stuff like fruit and starchy veggies like potatoes. Carrots were ok for me because they are a low sugar/starch root veggie, and not so appealing that I ever was at risk of overeating them. I personally had to stay away from nuts on ketosis because in their dried form I found them too easy to over-eat, and they have quite a bit of carbs, so it stalled weight loss.
My experience mirrors what Dr Fred Bischi has found in his practice: That ketogenic will give you short term gains but it isn't sustainable long term.
One of the reasons ketogenic and low carb helps people in the US feel better and lose weight is primarily because eating that way necessitates removing a lot of the harmful stuff that is normally in people's diets. Processed foods. Fast foods. Packaged prepared foods. Almost all restaurants. And I also believe that not eating carbs limits your overall eating because you really can't overeat meat without feeling sick; but you can easily easily overeat sugar and carbs. Maybe it has something to do with the fact that the body has a mechanism for turning excess carbs and sugar into stored fat, but has no storage mechanism for all that animal flesh and fat. The later just overworks your liver and digestion trying to get rid it all out of your body. So by denying your body's addiction to carbs and sugar you will necessarily eat less.
What I found, and what Dr Bischi says as well, is that the reason a lot of these different fad diets give Americans results is because it represents an improvement over the standard American diet they were previously on. And because the fad diet they are on is actually closer to the ideal of raw vegan that we were designed to eat than the diet they were on before.
Dr Bischi has said that it's almost impossible to not settle down to your ideal weight if you eat raw vegan. I have found this to be true. You don't get underweight, but you can't sustain being overweight either. Because if you are eating fresh whole raw produce, nuts, and seeds, it's very difficult for your body to want to over eat any of it. I've found it's only when you start processing and cooking foods, removing water and fiber and nutrients in the process, that your body is not only capable of eating more calories per bite but your body also starts to crave that unnatural calorie density like an addiction.
Because that's what typically causes addictions: When we take a substance found in nature and artificially alter it to be concentrated or changed. Drugs like heroine or morphine are deadly, but a simple poppy plant by itself won't harm anyone, no matter how many they try to eat fresh. It might even be beneficial to them. In some parts of the world they make poppy leaf tea.
Raw vegan makes sense when you understand God created us and the world, and designed us to eat a certain way and designed the earth to provide what we needed to eat. In that sense, it would make no sense to require plants to be artificially processed and cooked before eating them. If you can't eat it raw then there's a good chance you weren't ever intended to eat it. Having to process or cook something before you can eat it would imply they weren't already good for you in their natural form to sustain you. But when you start messing with God's design you have consequences. You can't put salt into a car's gas tank and expect to go anywhere, because that's not how it was designed to function. The same is true with our body. It was designed to eat a certain way, and when we don't follow that design there are natural consequences. Some more severe than others. Some taking longer than others. But consequences nonetheless.