An article from University of California, San Francisco describes Lustig's work as follows:
The rise of obesity is usually blamed on too much eating and not enough exercising, but Robert Lustig, MD, a UCSF pediatric neuroendocrinologist, asks us to look beyond the obvious.
More specifically, it is fructose that is harmful, according to Lustig. Fructose is a component of the two most popular sugars. One is table sugar — sucrose. The other is high-fructose corn syrup. High-fructose corn syrup has become ubiquitous in soft drinks and many other processed foods.Full article: "Sugar is a poison"
Those of us who follow LCHF by the letter avoid fruit completely, however a lot of us eat an occasional fruit and still have great results on the scale.
An orange is in principle; water, fibers, sugar and vitamin C. A much better alternative to i.e. an orange, which contains the equivalent of 6 sugar cubes, is sweet peppers (paprika). You only need 40 grams (1.5 oz) of paprika to get the recommended daily value of vitamin C. Paprika holds 4 times more vitamin C, then an orange.
Paprika falls well within the philosophy of LCHF, with 5.6% carbs. Personally I eat my 40 grams in the morning with my cream omelet and bacon. Since I want to keep my carb intake as low as possible. Paprika adds a nice crispiness and freshness to my breakfast.
Other good low carb sources of vitamin C are:
- Brussel sprouts
- broccoli (probably a favorite among LCHF people)
- cauliflower (try grating it and pan frying it, very tasty and acts as starch to get all the delicious sauce off the plate)