Does magnesium interfere with calcium absorption?

[Alex_p]

I’ve been taking calcium ever since my TT because of low PTH (500 mg x2 daily) and I’ve recently started taking Magnesium glycinate 750 mg before sleep, 2 hours after the calcium. I started seeing low calcium symptoms like cramps and I was wondering if I’m taking too much magnesium and if it interfers with the calcium.

[shaws Administrator]

I hope the link below is helpful:-

livestrong.com/article/4801...

[chrisbuy63]

Dr Berg on Youtube does some excellent (in my opinion) video's covering nutrients and supplements etc and has a few video's covering magnesium and also Calcium.

[humanbean]

I assume 750mg is the weight of the magnesium glycinate that you are taking and not the weight of magnesium contained within the magnesium glycinate?

According to this link :

en.wikipedia.org/wiki/Magne...

only 14.1% of the total mass of magnesium glycinate is magnesium. (The rest of the weight is made up of carbon, hydrogen, nitrogen and oxygen.)

So you are currently taking approx 106mg of magnesium, which is not a high dose.

But if the 750mg is the weight of magnesium that is nearly double the dose you ought to be taking.

The other consideration to think about...

The body excretes excess magnesium via the kidneys. Anyone with severe kidney disease could find their magnesium levels rising too high because their kidneys can't excrete the excess.

...

As for magnesium and calcium both being taken, perhaps you could take calcium in the morning and magnesium just before bed, since it would appear that high levels of one of them will reduce absorption of the other.

ncbi.nlm.nih.gov/labs/pmc/a...

explore.globalhealing.com/c...

You may find useful info on magnesium and calcium from websites relating to bone health because bones need both calcium and magnesium to be at good levels.

saveourbones.com/?s=magnesium

betterbones.com/?s=magnesium

Another thing to consider...

Vitamin D supplementation will increase calcium absorption from the diet. If your vitamin D is below optimal then raising it to optimal should help.

[humanbean]

I just came across this link :

livestrong.com/article/4229...

which mentions (my emphasis) :

Vitamin K is also crucial for maintaining calcium levels and is involved in calcium transport. As such, vitamin K functions as a key nutrient for strong and healthy bones. According to a review in the ​Journal of Nutrition and Metabolism​ in June 2017, vitamin K2 shows promise as an adjunct treatment for osteoporosis, a condition characterized by a loss of bone mass and bones that are brittle and break easily.

I don't know if they are referring solely to vitamin K2 or both K1 and K2 in connection with calcium transport.