Fraction of Zinc as Zn2+ Ions at Physiologic pH 7.4
Fraction of Zinc as Zn2+ Ions from Several Compounds at Physiologic pH 7.4
with Discussion

Of common zinc compounds, zinc chloride and zinc acetate release 100% of their zinc as Zn2+ at physiologic pH.  Zinc gluconate releases 30% as Zn2+, while zinc aspartate releases 0.1% as Zn<SUP><FONT SIZE=-2>2+</FONT></SUP> and other common zinc compounds release essentially no Zn<SUP><FONT SIZE=-2>2+</FONT></SUP> at physiologic pH.

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