Nobody will fall dead from excluding fruits and vegetables from his diet for 6 weeks or 2 months. There is still a problem with it, anyhow. Such a short period of time is not the test of whether or not the diet is harmful. You could say the same thing for exposure to solar radiation. You certainly will not fall dead or contract cancer immediately from being exposed to direct solar radiation for months. Those maladies develop over time. What might seem negligible now may develop into something much more serious when the body and the health begin to decline from natural causes. It's in the future when the bad part kicks in. There are many things people can do or not do in the short run which might not have any immediate adverse consequences. It's in the long term that these matters must be considered. There have been anthropological studies on the diets of various populations around the world. Two main takeaways are these. In societies with high quantities of consumption of meat, there is a high degree of heart disease and diabetes, among other maladies. In populations that consumed almost only 100% fresh fruits and vegetables and only a little meat, there were no signs of heart disease or diabetes anywhere. That study came from Dr Nathan pritikin. There are videos on YouTube about four or five young women who bicycled the Trans American route. They commented I don't know how many times on how they went through all these dinky little towns. Sometimes a cafe would be closed or out of business and all there were were convenience stores. They had videos of themselves sitting on the sidewalk in front of the store. They held up one item of junk food after another after another insisting it was all they could find. After some time they complained about having problems with their stomachs. They felt queasy and unsteady and dizzy and sick. There was another video by a woman who bicycles gravel trails. She experienced something similar to that. When she got to these little settlements small stores were her only choice for food. In fact they did not have anything that was really food. It was highly processed junk that could be chewed and swallowed, yes, but it was not really food. She complained about the same kind of sickness and illness in the gut. I cross the United States by bicycle and I got caught in the convenience store trap for about 4 days. I felt like hell. I had lost almost all my energy. I was going downhill fast and I did not like what was at the bottom. I finally got to where I could eat real food with nutrition and vitamins and minerals. It made a big difference.