The amount of calcium in it is not really in the supplement range for calcium. Don't worry about it. Supplement doses start at 1000mg a day and up. That little bit of calcium is in all the SlowMag versions, including the generic.

Chloride is just the carrier molecule. Most chemical compounds are in two parts. The most common chloride is sodium chloride, which is table salt. The amount of chloride in this is a spit in the ocean compared to one fast food meal in a restaurant. Just about every processed food is loaded with salt, and sugar in US. There are 2 chloride molecules for every magnesium in this product... this is because magnesium is divalent..remember your HS chemistry?
MgCl2.

Here is an article on chloride:
http://health.nytimes.com/health/gui.../overview.html
It is rare that chloride is a problem in people because the kidneys, do remove it. Those in hospitals on massive diuretic therapy may become
low in it. But it is so common in our environment that we consume it commonly.

There are some simple restaurant meals that can have 2,500 or more milligrams of sodium in them. Yahoo often has "Eat this and not That" snippets to reveal this abuse. In fact the men's book is quite interesting for everyone...
Read this site, if you dare...
http://eatthis.menshealth.com/home

example:
http://eatthis.menshealth.com/slides...staurant-meals
This massive burger has 6,600 mg of sodium !!!!!! And chloride is in equal measure since NaCl has one chloride per sodium ion.
http://eatthis.menshealth.com/slide/...sharetagsfocus

Magnesium chloride is one of the forms tested that showed good absorption. Neither the calcium nor magnesium is 100% absorbed, as the body has transport systems to do that and it is selective. However, a goodly amount of the magnesium is absorbed into the blood stream, to be effective for you.

If you eat magnesium containing foods, like almonds, beans, oatmeal, and yogurt, you need less magnesium. Two of these provides about 1/2 the RDA for those eating some but not ideal amounts of magnesium. People lose magnesium in urine daily, as well. Alcohol and caffeinated beverages, some drugs prevent normal magnesium levels in most people. Studies have shown that 70% or more of Americans are below the daily RDA of magnesium daily. If you take acid blocking drugs you are blocking its absorption from food, along with calcium and zinc too.

If you don't recall your high school chemistry, now is the time to
have refresher courses. I do not have the time to provide chemistry lessons for every poster. That information is easily found on the net.