Science is only a method of testing. some people are better at it than others. Some people are qualified, and have passed exams and follow particular procedures that make them better than others. Some falsify their records for other incentives than the truth. Some follow blindly into the dark and discover unexplained things and don't document it because they have no control over it.
Some scientists aren't qualified by the academics of the USA or UK and have experience in India or China and very successfully treat asthma and eczema etc.
To say asthma "can't be cured" is defeatest. And implying cleaning the body of pollutants has no "science" is just contradictory. Doctors used to use DMSA to cleanse lead from children. I suppose you would say Antibiotics have no Science to them, do they not kill bacteria in the body? Garlic has been proven biologically to have mild Antibiotics in them. Antibiotics comes from nature - penicillian from mold. In fact, excluding every other drug that exist today it is the only drug ever invented that has been proven to cure any condition. See the book - "What doctors don't tell you" pg 198 under the chaptor - Miracle Cures.
Is there no Science in food? What about the claims about calories, and people able to lose weight by reducing calorie intake a day. Excess Nitrogen is released from the kidneys when excess protein in the range of 75g protein a day causing ammonia and leading to neurological problems in children that are given cows milk instead of breast milk.
If its any consolation I had asthma when I was younger. I don't get it half as bad as I used to but then in my teens I did a lot of exercise and as I found myself becoming fitter, I didn't suffer so much asthma. Your right though I can't claim im cured of ashma as I still get a little wheezy if im subject to an old dusty blanket full of dust mites. But im not stupid, I avoid dusty environments, and avoid eating old food, or anything potentially with excess bacteria like sweets, mushrooms, yeasts, alcohol, bread, even apple cider vinegar, honey, syrups etc, milk, old nuts, melons, cheese, icecream, and I especially avoid the most toxic foods like peanuts and corn proven to contain potentially fatal aflatoxins. I suppose the best book I have read that discourages everything that has disagreed with me is "the ph miracle". But even that encourages eating sprouts, which if not prepared correctly can build up molds.
It takes a lot more than TRYING diets, to find your ideal diet. The point is, if you didn't suffer by excluding things, then why did you give this method up. Whether it cures you or not, im sure it helps in other areas in terms of energy levels throughout the day, rather than introducing something completely alien to your body that doesn't even exist in your own country. It seems completely unnatural and a massive shock to the body. The most important rule of healing anything is to introduce any medicine slowly. Its not the disease that kills people, its the side affects of the body in the process of healing itself of the offending agent that can kill you. Ok, if my statement isn't scientific its certainly logical. And if "science" doesn't agree with it, then "science" isn't logical.