ActProMin is a deposit mined out Churchill County in Nevada. Unlike other deposits on the market today, ActProMin is not a marine limestone, but rather a freshwater lakebed deposit unique in its formation and benefit. Both Calcium Carbonate Limestone and ActProMin are made up of shells. The difference is ActProMin is made up of gastropod shells that can only form under the purest of circumstances. It is, what geologists confirm, a Calcium Oxide. What differentiates a Calcium Oxide versus a Calcium Carbonate is the ability for the Calcium in ActProMin to be able to separate itself from the Oxygen, allowing the Calcium to be readily available for plant uptake, and animal digestion. Calcium Carbonate is not a chelatable deposit, meaning it does not have the ability to separate the calcium from the carbonate, therefore the majority of the calcium is still attached to the carbonate, leaving it useless for plant uptake and animal digestion. Studies confirm there has not been another deposit on the market that can compare with the benefits ActProMin provides. Reason being, the formation of ActProMin happened during a time, millions of years ago, when the Sierra Nevada Mountains rose to a height to intercept moisture, and it is not expected to ever rise to that height again. It was what geologists refer to as, the late Miocene Pliocene epoch. Simply put, it is not expected for a deposit so rich in minerals and readily available for uptake and/or digestion to ever be formed again. Some would say it is one of the many wonders of the world today, and we have it available for purchase today.Consumers can be confused when purchasing a calcium deposit. You can buy Calcium Carbonate Limestone for less than ActProMin, but that is simply because it takes that much more Calcium Carbonate Limestone to equivilate to the benefit of using a portion of ActProMin in lieu of. While Calcium Carbonate Limestone does provide Calcium and other nutrients, it takes a substantial amount more