As to dosages, please check previous postings on borax toxicity I been through that so many times. If you are still not convinced, then don't do it. As to the link you submitted, borax according to them is toxic at 0.6 mg/ml -- that is equivalent in drinking terms 600 grams per liter. That is hardly the dose I am considering. The dosage I use is 1/8 to 1/4 teaspoon (women requires low dose 1/8 then men 1/4 because of their size) per liter of water. That means it is added in all liters you drink and you determine if that remedy is helping you, and it doesn't require a long time, you should know within 3 to 7 days at the most. It is an essential mineral and the dose is much less than LD50. I calculate my dose assuming you weigh only one kilogram and need just 1/2 of that is my calculations for maximum dose and it is lower still if the person has any side effects on that amount. Therefore, the dose of 1/8 for women's dose is based on that.
As to details of ankylosing spondylitis, I don't have many patients here, probably I seen one or two. What I can conclude with certainty is it helps. The autoimmune disease for all mycoplasma and mycobacterium is really simple, the mycobacterium enters healthy cells and infects the inner cells, that's why is is so difficult to kill it and that is why they referred to as attacking healthy cells, but they are not healthy. Suppressing immune system would hardly be the way to go.
However there are a couple of avenues I found where we can kill them from the inside. Remember that nearly all antibiotics are useless with attacking the inside the cells they do not enter the insides of cells. There is one or two antibiotics that does get inside the cells - one is doxycycline the second one is minocycline. For the desperate I guess they will even try the second one. The doxycycline use is a lot better, which is one capsule and twice a day for the first time, and thereby once a day it takes about a week to know some effect but the people here it takes them only a day. Minocycline is a generally not recommended because of side effects, but those who do not respond will try it anyway. It causes nausea.
As to the borax, you can mix with hydrogen peroxide 3% one capful per 1 liter of water and 1/8 teaspoon. It hardly has any side effects, unless you have other issues, such as metal poisoning, in that case we treat metal poisoning first such as mercury poisoning amalgam or lead poisoning, in which case I prefer to use disodium EDTA or my favorite tetra Sodium EDTA, as it is less acidic. Without the metal poisoning it will be a bit easier by skipping this step and add take borax with hydrogen peroxide. In order to allow the body some breathing room between oxidation and anti-oxidation, you can try hydrogen peroxide for 5 days and no hydrogen peroxide for 2 days, and borax for all days.
The other way I have developed of killing the infection from the inside the cells is DMSO and Lugol's with aloe vera oil applied from the outside. That works too. There is also another method I have tried which is Castor oil with DMSO, that works too. And then if he doesn't respond to that one, this respond positively no matter what is the DMSO with tannic acid, where tannic acid is given at 1/8 teaspoon per 100 cc of DMSO and mixed with 30% to 50% water. As to the castor oil and DMSO is mixed with 50% each. As to the Lugol's and DMSO it's just applying Lugol's the area and then apply DMSO, then to relieve the inflammation I apply the aloe vera oil.
That's just the initial success then to help you way to recovery I probably require aloe vera oil drops between 5 to 10 drops, magnesium chloride solution 8 drops three times a day, and some 5000 i.u. of vitamin D2 or vitamin D3.
There is one thing you have to be aware of, normal antibiotics takes 9 months that's just for doxycycline. so I expected any natural remedies would take that long too, because mycobacterium that lines the inside the cells takes time, but if you do things right it may require less time.
In Bangkok things are a little strange. I chase clients because I think I have a cure, but people from Earthclinic at least, they are chasing me! There's probably an explanation in order as to why this occurs. It seems as if people here have the cure or at least something that will help them for their condition and therefore I am just drowned by other competitors! Since competition usually wins out (hospitals and other alternative healers) I spend my day typing out remedies if I have a free time.
P.S. The website mentioned in your post is administering a toxic dose even at 0.1 mg per milliliter works out to 100 mg per 100 milliliter works out to 1000 grams per 1000 milliliter. My dose is 1/8 teas per 1000 milliter or 1 liter.