The problem is that calcium triphosphate is not well-absorbed by anyone, including those of us that have had our stomach acid reduced. It's actually worse than carbonate.
Without knowing exactly how much citrate there is in the product, we can't say how much good you'll get out of that.
ETA: So I called the company cause I'm ballsy like that.
Supposedly, this product is 80% calcium citrate. And she assured me multiple times that it is 800mg elemental calcium from citrate. I did kind of throw her when I started telling her how much calcium is in the citrate molecule versus the carbonate or tricalcium phosphate molecule..
So let's look at some scenarios. She was absolutely assuring this was 80% calcium citrate. Let's say it is calcium citrate, but not elemental calcium? that's 800mg of calcium citrate. 1/4 of that or so is elemental calcium so 200mg of this would be actual calcium. So 2 Tablespoons would equate to 200mg of calcium. We need 1500-2000mg at a time, so you'd need quite a bit.
Or, she was correct in speaking that it was 800mg -- in which we only absorb about 500mg - 600mg at a time so, you'd still have to take it 3-4 times a day.
You can take the chance that it is actually elemental calcium. I'm just not going to, personally.