How much fruit were you regularly consuming before going zc?
Agreed. Do what works.
I didn't go quickly cold turkey to ZC--I went gradually and grudgingly to LC, then VLC, then ZC--so it depends when before ZC you mean. Before going LC I had been increasing my consumption of raw fruits and whole-fruit smoothies in an effort to gain weight and increase potassium. I noticed that my acne, IBS, potassium-cramps in my foot, nightmares, etc. worsened as I did so and I didn't succeed in bulking up. Instead, my energy and strength declined and I seemed to be withering away. All this was part of what led me to think that lower carb might be worth trying.
The fact that my potassium cramps got worse rather than better was particularly suprising to me, since I was eating so-called high-potassium foods like bananas and taking potassium supplements. The improvements from lowering carbs began early on, but it wasn't until I got my carbs down to VLC and I greatly increased my intake of raw red meats and fats that my potassium cramps were diminished to very low levels. This was quite a shock to me. I later learned from William and elsewhere that carbs bind with minerals like potassium (though there are disagreements on what effects this has on absorption). I originally didn't intend to go ZC at all, but as I gradually reduced my carb levels I noticed improvements right from the start and greater and greater improvements every step of the way. I know some people consider raw fruits as perfectly good food, but for me they have not proven so. I'm not saying that this necessarily applies to anyone else, just reporting my experience. I like fruits and am trying to find a way to incorporate a small amount of them in my diet without triggering negative effects, so it's not at all a matter of me wishing to be ZC or even VLC.
Apparently I'm not the only person to experience problems with raw fruit. Dr. Kurt Harris and others report not doing well healthwise when their fruit intake gets too high. Dr. Harris goes as far as discouraging anyone from eating any fruit other than moderate amounts of berries:
"Fruit is just a candy bar from a tree. Stick with berries and avoid watermelon which is pure fructose. Eat in moderation." (
http://www.paleonu.com/get-started).
Dr. Harris' advice does match my personal experience. I've also noticed that the folks who eat lots of fresh, raw, whole fruits, such as the 811ers, tend to experience many of the same health problems that I did (including acne in some cases) and more.
If I want to have acne break out on my face (and possibly scalp, chest and back) tomorrow I have found that all I have to do is eat sufficient fruit--especially sugary tropical fruits or fruit smoothies or juices, but even sufficient low-sugar fruit has done it in the past. Then, if I want to get rid of the acne within a day or two, I just go back to eating meat and fat. I have replicated this multiple times and it didn't start only after I had been ZC for a while. In retrospect it's not surprising, since sugars are strongly linked to acne. The idea that raw fruit sugars--even from fresh, raw, fiber-rich fruits--are somehow exempt from this does not appear to hold up in my case.
Gary Taubes reports that the research of Peter Mayes and Jorgensen C. Reiser found that "given sufficient time, high-fructose diets can induce high insulin levels, high blood sugar, and insulin resistance, even though in the short term fructose has little effect on either blood sugar or insulin and so a very low glycemic index." (GCBC, pp. 200-201). Insulin resistance is connected to acne (Dr. Cordain - Ph.D. in Health: Audio Interview,
http://www.acne.org/interviews/2008/07/10/dr-cordain-phd-in-health/). Interestingly, I have never been diagnosed with insulin resistance (though some of my relatives have), so perhaps even sub-clinical levels of insulin resistance can contribute to acne, or maybe other mechanisms are at work in me.
YMMV--for example, Tyler appears to tolerate raw whole fruits much better than I do.