There is definitely more absorbing types of calcium - but this is dealing with not destroying the minerals in the small intestines - where they are proven to crystalize in large percentages - regardless of how much was absorbed or not.

This is an uneducated comment, but I would think that if the calcium in algae calcium is as it is in the algae, it would already have any protection it needed by God's design.

Our R&D was not allowed to list the 250 companies they tested for this, but I have wondered about "whole food" supplements - versus processed. IDK. Consistency in whole food supplements is a concern, but algae??? That is not like growing plants on depleted soil.