Dicalcium Phosphate
Dicalcium Phosphate is a unrated form of Calcium, used in 1,254 on-market products and providing 23.3% elemental calcium by weight.
1,254
on-market products
unrated
quality tier
23.3%
elemental fraction
Basis: CaHPO4 x 2H2O, dihydrate (label cross-check of 23% Ca/g matches dihydrate rather than anhydrous 29.5% -- spot-check against specific labels)
Why this tier: No specific human comparative bioavailability study vs carbonate/citrate was verified.
Source: none located (no human comparative absorption study of dicalcium phosphate vs carbonate/citrate found)