How much magnesium is this? Pic attached

[MoonAndStarsAndSky]

I've been taking two of these magnesium tablets a day (have always taken them to prevent migraines) and now I'm worried I've been taking too much. I'm 9 weeks. Does this mean there's 516mg in two tablets or 160mg?

Sorry for the tiny writing in photograph it says:
Magnesium citrate - amount per serving 516mg
Providing magnesium- 160mg

Thanks everyone.

I can’t read it

Sorry, just seen that youve written it !

You need to look at how much elemental magnesium it has

Providing magnesium- 160mg

I think this is key