Top positive review
122 people found this helpful
Kirkland Signature is synonymous of good products and this Calcium 600mg+D3 is evidence of that
on January 4, 2015
Kirkland Signature is synonymous of good products and this Calcium 600mg+D3 is evidence of that. There are several persons here that gave this product low rates because is Calcium Carbonate (CaCO3) and they wanted Calcium Citrate (Ca3(C6H5O7)2). Some say that the label showed is misleading even it says: “Compare to Caltrate 600mg+D3,” and we all know that Caltrate uses Calcium Carbonate. Really two good and known brands of Calcium (OsCal and Caltrate) use Calcium Carbonate. The Department of Lung Transplant of Jackson Memorial Hospital in Miami prescribes Calcium Carbonate (OsCal) to their transplant patients. Calcium Citrate is better absorbed than Calcium Carbonate (improved bioavailability) and that’s an important difference, but Calcium Carbonate has twice the amount of elemental Calcium than Calcium Citrate. For example, 600mg of CaCO3 ~ 240mg elemental Ca (40%), and 600mg of Ca3(C6H5O7)2 ~ 120mg (21%) elemental Ca. You need more Calcium Citrate than Calcium Carbonate pills to ingest the same amount of Calcium. Calcium Carbonate requires extra stomach acid so that it can be dissolved and absorbed, i.e., you need to take it with food or a meal; while the Citrate in Calcium Citrate provides enough acid to do the same work and it isn’t necessary to take it with food. Calcium Carbonate may cause stomach discomfort such as gas or constipation, if that’s the case you need to increase water and fiber intake, but if this not help you should try another type of Calcium. Anyway, if you are looking for Calcium Citrate from Kirkland in Amazon you can find Kirkland Signature Calcium Citrate 500mg (500 Tablets) with vitamins D3 and B6, Magnesium, Zinc and others minerals (Highly Absorbable Calcium for Strong Bones) that is a very good choice. Calcium Carbonate is inexpensive and cheaper than other types, like Calcium Citrate (or Calcium Citrate Malate or Calcium Chelates, etc.), simply because it is a substance easy to find in nature. At the end, the type of Calcium you need depends of your individual metabolic type and different types of Calcium can be better for different people.