Ferrous fumerate - does it interfere with Calcium absorption?

I've been out of the MB loop for a while and have a question. 

For the past two years I have taken prescription strength iron but my insurance coverage ran out, so I am taking iron over-the-counter.  I found some iron called HEMEVITE in the form of ferrous fumerate. 

Somewhere in my brain is a faint memory of a thread on here that said a particular form of iron WOULD not interfere with Calcium consumption. For years I have scheduled my iron a few hours from my (three times daily) doses of calcium.  Is this necessary with ferrous fumerate?

I'm sure one of the vets will tune in, but it is my understanding that the calcium interferes with the absorption of the iron, not the other way around.

It is my understanding that Calcium and IRON simply should not be taken together - either one interferes with the absorption of the other - same goes for ZINC.  I.E. dont take Zinc, Iron or Calcium (any combintation of two or three of these) together. 

However, I am thinking there is a type of iron that is the exception.  Could be dead wrong, but I thought I would ask. 

Almost three years out and rolling right along.

 Proferrin which is heme iron polypeptide supposedly can be taken with calcium but if you call them up they will tell you its ideal not to be taken together. 

I take my proferrin and then I take my calcium 1-2 hours later just to be safe

Still being cautious about taking the ferrous fumerate with the Calcium, until my Iron is within range again.

Ahhh, this is interesting.  I think the brand name "Hemevite" is deceptive.  In our minds it makes us think that this contains heme iron, but if it is ferrous fumerate, then it isn't heme iron.  You are thinking of past threads here that have said that real heme iron can be taken with calcium.  (Although, I did find interesting the comment above from Princesss, who wrote about calling the manufacturer of Proferrin.)

What you have now (the ferrous fumerate) still needs to be taken away from calcium.  (What I have read on this forum is that calcium and most forms of iron compete for the same receptors, and calcium wins.)

The only brands of real heme iron that I know of are Proferrin and Bifera (not sure of my spelling on either of them).  Unfortunately, they are pricey.  Some months ago the manufacturer of Proferrin had a problem and couldn't make it for a while, which had a lot of it's customers scrambling.  Some went to Bifera, which at least has some heme iron in it, although it is a mix of some expensive heme and some of a cheaper kind of iron.  I haven't purchased either of them yet, but when I have priced them, the Proferrin costs more per pill than the Bifera, but when I calculated the price per mg of heme iron, the Proferrin was ahead, if I recall correctly.

(Tangent -- My insurance won't cover Proferrin.  I had a few dollars of credit at drugstore.com, plus a $5 off promotion, so I decided to bite the bullet and actually buy some Proferrin several days ago, and I went through this whole process, only to find that drugstore.com will only let it go through with a prescription (and I was not trying to buy the form that the manufacturer tries to get people to buy with an Rx, Proferrin Forte, which just has some added folic acid).  I called to talk to a real person at drugstore.com, and talked to two different departments, but they would not let me get it without an Rx.  So, I need to get it somewhere else.)

Anyways, vets please correct my facts if I am mistaken.