Hypocalcemia

Hello everyone.

38 M. In 2016 I've suffered fluoroquinolone toxicity (for those who don't know, Fluoroquinolones are a class of antibiotics known to cause severe and permanent damage, expecially to the nervous and muscoloskeletal system.

They're also known, among other things, to deprive the body from essential minerals (magnesium expecially).

I've been supplementing with Vitamin D3, 5000 iu a day, K2, 200 mcg a day, in the winter, and magnesium, about 400 mg a day from mag. glycinate, citrate or chloride (this last one in it's liquid ionic form), for years now.

While my vitamin D levels are great (50+ ng/ml), my magnesium levels are too low (I've done the RBC test).

I remember years ago I was taking 3 mg of Boron a day too, because I've read it should imrpove vitamin D absorbtion. In fact, after about 3 weeks, I checked my D levels again and they were really high (70 ng/ml), but it also raised calcium levels too. Calcium wasn't out of range, but on the upper limit. So I stopped with the Boron, and in a couple of weeks my Calcium got back to normal.

Last month I've repeated the Boron experiment (this time only 1.5 mg a day) because I've read that Boron improve Magnesium absorbtion too (which like I've mentioned, it's always been low), even though I was a little worried that my calcium levels would raise too much again. With my surprise, this time my calcium serum leveles were too low! Not a huge deficency, but not right at all.

I do you explain this? Why my calcium levels dropped so much, even though I'm taking Vit D and K2 (vitamins known to improve caclium absorbtion) and expexcially Boron, which in the past greatly increased my calcium?

I'm showing signs of demineralization (frail tooth enamel, muscle tears on my legs), and that's why I'm always trying to supplemments with minerals and vitamins.

Should I supplement with more magnesium? Is it possible that magnesium, even if still too low on the RBC test, it's messing with calcium absorbtion?

Does anyone have any idea? Thank you so much.

EDIT

Right now I'm only taking the liquid magnsium chloride (ionic) from Now foods. In the past I've used Magsnium Glycinate and Citrate in powder form. Should I use tablets or capsules, instead of powder? Are they better absorbed?