What is the difference between Zinc Acetate and Zinc Gluconate?

Both have high absorption and low cost. Choose zinc acetate when you want cold lozenges; choose zinc gluconate when you want a well-studied, cheap, well-absorbed salt.

Form Comparison

Zinc Acetate vs Zinc Gluconate

How zinc acetate and zinc gluconate differ in elemental content, absorption, tolerance, and cost.

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Quick verdict. For cold lozenges, acetate is the stronger choice: it releases a higher fraction of free zinc ions in the mouth, and the lozenge trials used acetate or gluconate at about 75 mg zinc a day, started at the first symptoms. For daily swallowed supplementation, gluconate is cheaper and just as well absorbed. Avoid lozenges made with citric acid or other binders that chelate the free zinc.

Side by Side

	Zinc Acetate	Zinc Gluconate
Elemental content	30% elemental zinc	14.3% elemental zinc
Absorption	High	High
How it is absorbed	Soluble salt that releases a high fraction of free zinc ions in solution, the rationale for its use in lozenges dissolved slowly in the mouth.	Soluble salt releasing ionic zinc, absorbed in the small intestine via ZIP4 transporters. Fractional absorption matched zinc citrate and exceeded oxide in Wegmuller 2014.
Typical dose	Lozenges providing about 75 mg zinc per day for the first days of a cold	15-30 mg elemental zinc daily
Common uses	cold lozenges, Wilson disease (prescription)	general supplementation, cold lozenges
Side effects	Bad taste and nausea with lozenges.	Nausea on an empty stomach.
Cost	Low	Low
Also called	None	None
Labels in index	18	476

When to Choose Zinc Acetate

Choose zinc acetate when you want cold lozenges. Lozenge benefit depends on formulation; binders like citric acid can chelate the free zinc.

Zinc Acetate

The best-tested salt for cold lozenges, alongside gluconate.

What to look for: Lozenges without citric acid, tartaric acid, or glycine. Start within 24 hours of symptoms and stop after a week.

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When to Choose Zinc Gluconate

Choose zinc gluconate when you want a well-studied, cheap, well-absorbed salt. One of the two salts used in cold lozenge trials.

Zinc Gluconate

Choose zinc gluconate when you want a well-studied, cheap, well-absorbed salt.

What to look for: Zinc Gluconate named on the Supplement Facts panel, with the amount per serving stated.

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Products on Titrate

In Titrate's index of NIH label data, 18 labels named as zinc products list zinc acetate and 476 list zinc gluconate.

Open supplement search

Zinc does not have its own search category yet. Each product above links to its full label in the NIH database.

References

NIH Office of Dietary Supplements. Zinc: Fact Sheet for Health Professionals.

Barrie SA, et al. Comparative absorption of zinc picolinate, zinc citrate and zinc gluconate in humans. Agents Actions. 1987;21(1-2):223-228.

Age-Related Eye Disease Study Research Group. A randomized, placebo-controlled, clinical trial of high-dose supplementation with vitamins C and E, beta carotene, and zinc for age-related macular degeneration and vision loss: AREDS report no. 8. Arch Ophthalmol. 2001;119(10):1417-1436.

Willis MS, et al. Zinc-induced copper deficiency: a report of three cases initially recognized on bone marrow examination. Am J Clin Pathol. 2005;123(1):125-131.

Nations SP, et al. Denture cream: an unusual source of excess zinc, leading to hypocupremia and neurologic disease. Neurology. 2008;71(9):639-643.

Wegmüller R, et al. Zinc absorption by young adults from supplemental zinc citrate is comparable with that from zinc gluconate and higher than from zinc oxide. J Nutr. 2014;144(2):132-136.

Hemilä H. Zinc lozenges and the common cold: a meta-analysis comparing zinc acetate and zinc gluconate, and the role of zinc dosage. JRSM Open. 2017;8(5):2054270417694291.