Zinc Citrate
Zinc Citrate is a tier 1 form of Zinc, used in 2,231 on-market products and providing 32.1% elemental zinc by weight.
2,231
on-market products
tier 1
quality tier
32.1%
elemental fraction
Basis: Zn3(C6H5O7)2 x 2H2O, dihydrate (USP monograph, NLT 31.3% Zn dried basis)
Why this tier: Isotope-tracer RCT: absorption 61.3%, comparable to gluconate, significantly higher than oxide.
Source: Wegmuller R et al. 2014, J Nutr 144(2):132-136, PMID 24259556