Can you gain fat on a high fruit carb, almost zero overt fat diet?
Of course you can. It CAN be done with fruit. I did it. I have experimented from lean to fat and back and forth just to prove it to myself. It is far more difficult with fruit, since even bananas and dates (and I did not even use Durian fruit in my experiments), while more calories per volume than most fruits (hence there great benefit) exit your cells fast, compared to other foods, including cooked carbohydrates and especially refined carbs.
The fat storage gain also happens quicker and easier when one has restricted one's calories for years before stuffing oneself with any kind of carbs. Your "carburetor" system must re-adjust yourself in order to process energy the most efficient way for your body again. There are other factors, but it is a calorie in/ calorie out equation, but with a "time and habit -established metabolic twist". For survival purposes, our bodies are cautious in switching gears so to speak when we change our calorie inputs. Whatever changes occur due to different types of calories, whether they be carbs, protein or fat, is not AS important as the total calories. Calories are where its at, and when you add or subtract 50%- 200% or more; changing your diet pattern, and you keep that addition or subtraction going for many months, then you will see changes in your body composition.
I did not only add over 250% more fruit calories in my last nine month experiment. (A disciplined task in itself! That is a whole 'nother story!), but I ALSO deliberately added more rest (An even harder task!) to my daily lifestyle. Put it this way: I even went so far as to sit down when I prepared all my meals, of which half were blended and half were eaten, basically. About ten percent of my cals came from Tangerine of Orange juice. I sat instead of standing, reclined instead of sitting, went to bed earlier, took half hour naps almost every day, etc. I even cut my workouts in half (which is always a good thing for me since after 35 years of super intense fitness, the only way I can get results is to put even more work into less time- that is just the nature of force generation vs. recuperation. In order to build muscle, one has to be extremely stingy with their energy and time. But that is another chapter in and of itself).
Suffice it to say that I do not only believe that it is possible to gain fat on a high carb (and almost ZERO overt fats I must add) fruit and greens diet, but I actually did it myself. In fact, for the first time in my life (other than when I had my spine almost broken in two by an auto accident in 1998 and was in bed for months and then for a year literally on my hands and knees), only with huge amounts of fruit (for me) coupled with deliberate reduction in activity (not easier activity) was I EVER able to gain fat in my entire body.
PS: There is no way that I could eat the volume of fruit that I did without years of building up to it of course. I never thought that this could be possible, but since I am a determined Aries person, I had to prove this, at least to myself. I do not think many people would ever go through this ordeal in order to see what happens. But that is how I am. In fact, the more that others tell me that I can not do something, and I feel that it is a valuable thing to learn, then I will do whatever I can to master it once and for all. I just love "a priori" knowledge and my biggest pet peeve in this whole wide world is people who base things on research solely. It is a house of cards that I just can not live in.