There have been studies pointing out fruits even help decrease symptoms of diabetes.
http://nutritionj.biomedcentral.com/articles/10.1186/1475-28...
The conclusion of the randomized study above was that the intake of fruit should not be restricted, despite the fear that sugar makes you die.
http://www.cabdirect.org/abstracts/19711408038.html;jsession...
This one has a mainly fruit diet for its participants. 2500kcal of fruits per day. No one had any serious side effects.
These "not man-made", paleo, keto, low-carb and other diets are all fads. All of them. They promote an unhealthy relationship with food. Not unhealthy as in philosophy but unhealthy scientifically (orthorexia + the humongous evidence that food is not poison).
It's a much higher chance that the American population is extremely orthorexic and that they avoid fruits and veggies thinking that pesticides and sugar will kill them. This unhealthy relationship results in overeating highly caloric foods like meat, dairy, eggs, drinks etc.
I highly recommend
In Defense of Food: An Eater's Manifesto
http://www.amazon.com/Defence-Food-Nutrition-Pleasures-Eatin...
The Gluten Lie
http://www.amazon.com/Gluten-Lie-Other-Myths-About/dp/194139...
for anyone thinking they have an unhealthy relationship with food that could cause them to have an unhealthy diet.
It's unbelievable that this community believes in fad diets (keto, paleo, lchf, atkins, etc.), that it is afraid of food, afraid of sugar.
Sugar, carbs and fat makes you fat, not sugar alone.
This scaremongering of certain types of foods is negatively influencing people to have an unhealthy relationship with food.
Robert Lustig is an idiot who in his speech told a bunch of lies and presented a lot of misinformation. Is it really hard to check the facts?
Checkout books below if you have any fears of any foods.
In Defense of Food: An Eater's Manifesto
http://www.amazon.com/Defence-Food-Nutrition-Pleasures-Eatin...
The Gluten Lie: And Other Myths About What You Eat
http://www.amazon.com/Gluten-Lie-Other-Myths-About/dp/194139...