Question: Why is fruit ok but refined sugar is not when it comes to eating Paleo?
Answer: Part of being Paleo inherently limits any added sugars. By focusing on eating lean animal meats, seafood, vegetables, seeds, nuts and some fruit the amount of actual sugar in one’s diet is quite low. Yes, there is sugar in the form of fructose, glucose and sucrose in fruit. Some fruits (bananas pineapple, mango, for example) have more sugars than others (berries, oranges, lemons). Our caveman ancestors ate fruit in season, however it was much less sweet than the fruit we find in our grocery store today. How many crab apples do you want to eat anyway?
For those who are not trying to lose weight or are especially athletic and who have even blood sugar levels it is probably not an issue how much fruit is eaten in one day. For those of you who are looking to slim down or experience low blood sugar episodes, it would be wise to limit the amount of fruit eaten and to eat the fruit with a meal or some fat to help slow down the effect the sugars have in the bloodstream. As with anything, some people are more sensitive to sugar than others so it is important to pay attention to how you feel after eating it.
There is a great breakdown of sugar levels in fruit on The Paleo Diet site that you may be interested in as a resource.