And then she will hit her limit and need other foods eventually.
Just like us old timers who have been there done that.

And Durian Rider shoots up Vitamin B12

Ah yes, other side effects of fruitarianism I remember:
-much much lower libido. Most fruitarian I ask say they have a 50% lower libido, but I know it's even much lower, it's just it does sound good to say : 80-90% lower.
-burnt out adrenals
-very active, but feeling stressed, irate thinking, extreme mood swings, obsession about find ripe fruits, spending a lot of the time looking for ripe fruits/markets/going very often to far way markets to get your fruits.
-never feeling grounded

I still happy I did it, it's just that I should not have seen it as a lifestyle nor done it so long time.

Some good side effects:
-got an incredible sense of smell, bad in a way, as many smells are really bad
-in the beginning: clarity of thoughts
-as I said earlier, very active and got a lot of things done (which in the end became stress and confusion)

fruitarian diet is ok for 3- 90 days(hotema said one girl drank only fruit juice for 6 months with incredible results, e.g. teeth regrew), to cleanse the body...but one should transition to raw animal foods while still eating fruits

Yeah, I also got an incredible sense of smell from going fruitarian for 8 months or so some 20yrs ago. (books by Hilton Hotema) To this day my sense of smell has not diminished much, and yes it has its down side in that I can smell just about everything far too well.

My sense of taste and smell improved just as dramatically while following a raw meat based diet....so It seems more reasonable to suppose that by elimination of cooked processed foods and avoiding artificial flavor in general, one can reset ones taste sensitivity on a variety of raw based diets ranging from meat heads to vegetarians to full fledged fruites.

Also a number of conditions attributed to be cured by fruit based diets, I believe are simply a result of eliminating other troublesome foods, rather than some magical really properties of fruit alone. "The 34-year-old says her migraines, acne and yeast infections have all cleared up since she has followed the diet." These conditions were likely triggered from eating the wrong kind of foods to begin with...an elimination of grain, soy, cooked starch, vegetable oils, and the plethora of other inflammatory foods, people falsely believe are healthy for human consumption, can resolve a number of issues regardless of if you replace those foods with meat based or fruit based diets.

Its a safe bet that, If she went into a well balance meat heavy paleo diet instead her results would be much better overall and more sustainable long term. Sure it is true that such a diet, can in the short term eliminate the sources of inflammation and alleviate its manifested chronic symptoms, through catabolic removal of metabolic antigenic waste,  but in the long term fruit based diets offer little in the way of anaboic elements which the body needs to rebuild and sustain itself optimally over the course of a lifetime.