# Zinc Tartarate

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/zinc-tartarate
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-03-28
**Evidence Score:** 2 / 10
**Category:** Mineral
**Also Known As:** Zinc tartrate, Zinc(II) tartrate, Tartaric acid zinc salt, Zinc L-tartrate, Zinc 2,3-dihydroxybutanedioate, CAS 551-64-4

## Overview

Zinc tartrate is a chelated zinc compound formed by binding zinc ions with tartaric acid, a naturally occurring organic acid found in grapes and wine. The chelation is theorized to enhance zinc absorption across intestinal epithelial cells by protecting zinc ions from binding with phytates and other dietary inhibitors in the gut.

## Health Benefits

• Enhanced zinc bioavailability through chelation with tartrate ions (limited evidence)
• Potential support for enzyme function (theoretical based on zinc's role)
• Possible [antioxidant activity](/ingredients/condition/antioxidant) support (proposed mechanism only)
• May improve zinc absorption compared to non-chelated forms (limited evidence)
• Could support general zinc-dependent biological processes (theoretical benefit)

## Mechanism of Action

Zinc tartrate delivers elemental zinc by dissociating in the gastrointestinal tract, releasing zinc ions that are absorbed primarily via ZIP4 (SLC39A4) transporter proteins in duodenal and jejunal enterocytes. The tartrate ligand may reduce zinc precipitation caused by phytic acid and oxalates, theoretically increasing the fraction of soluble, absorbable zinc reaching the brush border membrane. Once absorbed, zinc acts as a cofactor for over 300 metalloenzymes including carbonic anhydrase, alcohol dehydrogenase, and Cu/Zn superoxide dismutase, supporting [antioxidant](/ingredients/condition/antioxidant) defense and metabolic function.

## Clinical Summary

Direct clinical research specifically on zinc tartrate is extremely sparse, with no large-scale randomized controlled trials (RCTs) identified in the published literature as of 2024. Most evidence for its bioavailability advantage is extrapolated from comparative studies on other organic zinc chelates such as zinc gluconate and zinc citrate, where chelated forms demonstrated modestly superior absorption versus zinc oxide in trials of 20–60 participants. A small number of in vitro solubility studies suggest zinc tartrate maintains higher ionic zinc availability at intestinal pH compared to zinc sulfate, though in vivo confirmation in humans is lacking. Given this gap, health claims surrounding zinc tartrate largely rest on established zinc biochemistry rather than compound-specific clinical data.

## Nutritional Profile

Zinc Tartrate is a zinc salt of tartaric acid, primarily serving as a mineral supplement source of elemental zinc. Elemental zinc content: approximately 20-25% by weight depending on hydration state. Tartrate component: approximately 55-60% tartaric acid by weight, contributing minimal caloric value (~2 kcal/g for tartrate portion). As a chelated/salt form, zinc is bound to tartrate ions which may enhance solubility and gastrointestinal absorption compared to inorganic zinc salts such as zinc oxide (~10-15% bioavailability). Bioavailability of zinc from zinc tartrate is estimated to be moderately higher than inorganic forms, potentially comparable to zinc gluconate or zinc citrate (absorption rates estimated 28-40%), though direct comparative human trial data remain limited. Zinc itself is an essential micronutrient involved in over 300 enzymatic reactions; typical supplemental doses provide 5-25 mg elemental zinc per dose. Tartrate ions are generally metabolized via the citric acid cycle or excreted renally and do not contribute significant nutritional value. No significant macronutrient content (protein, fat, carbohydrate) is present. No notable vitamins or additional micronutrients are inherently present. Bioactive compound activity is largely attributable to the zinc ion itself, with tartrate acting as a carrier ligand with possible mild [antioxidant](/ingredients/condition/antioxidant) properties at physiological concentrations (limited evidence).

## Dosage & Preparation

No clinically studied dosage ranges for zinc tartrate are available in the current research. Specific dosing information would require clinical trial data and pharmacokinetic studies not present in the available sources. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Zinc tartrate is generally considered safe at doses providing elemental zinc within the established Tolerable Upper Intake Level (UL) of 40 mg/day for adults set by the U.S. Institute of Medicine; exceeding this chronically can cause copper deficiency by competing for intestinal metallothionein binding and absorption via ZIP2 transporters. Common side effects of excess zinc intake include nausea, vomiting, and gastrointestinal cramping, particularly when taken on an empty stomach. Zinc supplementation can reduce the absorption of fluoroquinolone and tetracycline antibiotics by forming insoluble complexes in the gut, and may interfere with penicillamine therapy; separating doses by at least two hours is recommended. Pregnancy safety follows general zinc guidelines, where supplementation up to the UL is considered acceptable, but high doses should be avoided due to potential teratogenic risk at supratherapeutic levels.

## Scientific Research

The research dossier does not contain any specific human clinical trials, randomized controlled trials, meta-analyses, or PubMed PMIDs evaluating zinc tartrate. Clinical evidence for zinc tartrate's efficacy and safety in humans is currently lacking in the available literature.

## Historical & Cultural Context

The research dossier does not contain information about the historical or traditional use of zinc tartrate in medicine systems. Its use appears to be primarily as a modern chemical compound rather than a traditional remedy.

## Synergistic Combinations

Vitamin C, Quercetin, Copper, B-complex vitamins, Magnesium

## Frequently Asked Questions

### How much elemental zinc does zinc tartrate contain?

Zinc tartrate typically provides approximately 20–22% elemental zinc by molecular weight, based on the molecular formula ZnC4H4O6 (molecular weight ~213 g/mol). This is comparable to zinc gluconate (~14% elemental zinc) but lower than zinc oxide (~80%), meaning the dosage of the compound required to deliver a target elemental zinc dose will differ significantly between forms. Always check supplement labels for the stated elemental zinc content rather than the total compound weight.

### Is zinc tartrate better absorbed than zinc oxide?

In vitro solubility data and extrapolated evidence from studies on similar organic zinc chelates suggest zinc tartrate may dissolve more readily at intestinal pH values (approximately 6.0–7.4) than zinc oxide, which has very low solubility under these conditions. However, no direct head-to-head human pharmacokinetic trial comparing zinc tartrate specifically to zinc oxide has been published. Until such trials exist, claims of superior bioavailability remain plausible but unconfirmed for this specific compound.

### What is zinc tartrate used for in supplements?

Zinc tartrate is used as a source of elemental zinc in dietary supplements targeting immune function, wound healing, testosterone metabolism, and enzymatic cofactor support, all roles supported by extensive research on zinc itself rather than the tartrate form specifically. It is also occasionally found in topical formulations and lozenges due to the organic acid carrier potentially improving palatability and solubility. Its use is most common in premium or specialty supplement lines that market chelated mineral forms as more bioavailable alternatives.

### Can zinc tartrate cause copper deficiency?

Yes, chronic supplementation with any zinc form, including zinc tartrate, at doses exceeding 40 mg elemental zinc per day can competitively inhibit copper absorption in the small intestine. Both zinc and copper share the ZIP2 transporter and are regulated by intestinal metallothionein, which has a higher binding affinity for zinc, effectively sequestering copper within enterocytes and reducing its transfer to portal circulation. Prolonged copper deficiency can manifest as anemia, neutropenia, and neurological symptoms, so long-term high-dose zinc supplementation warrants periodic monitoring of serum copper and ceruloplasmin levels.

### Does zinc tartrate interact with antibiotics?

Zinc ions from zinc tartrate can chelate with fluoroquinolone antibiotics (such as ciprofloxacin and levofloxacin) and tetracyclines (such as doxycycline), forming poorly soluble complexes in the gastrointestinal tract that significantly reduce antibiotic absorption by up to 50–70% in some pharmacokinetic studies. To avoid this interaction, zinc tartrate supplements should be taken at least 2 hours before or 4–6 hours after these antibiotic classes. Patients on quinolone or tetracycline therapy should inform their prescriber or pharmacist before initiating any zinc-containing supplement.

### What is the difference between zinc tartrate and zinc citrate?

Zinc tartrate and zinc citrate are both chelated zinc forms designed to enhance absorption, but they differ in their chelating compounds—tartrate ions versus citrate ions. Limited evidence suggests both forms may offer improved bioavailability compared to non-chelated forms like zinc oxide, though direct comparative studies between them are sparse. The choice between them may depend on individual tolerance, as citrate is more commonly researched in supplement formulations. Both are generally considered well-tolerated mineral forms with similar safety profiles.

### Does zinc tartrate need to be taken with food or on an empty stomach?

Zinc tartrate, like most zinc supplements, is typically better tolerated when taken with food, which can reduce gastrointestinal upset, though this may slightly decrease absorption rates. The tartrate chelation may provide some protection against acid degradation in the stomach, potentially allowing flexibility in timing compared to non-chelated forms. For optimal absorption, taking it with a light meal that is not high in inhibitory compounds (such as phytates or calcium) is generally recommended. Consistent timing with the same meal conditions helps maintain stable zinc levels and absorption patterns.

### What does research say about zinc tartrate's effectiveness compared to other zinc forms?

Clinical evidence supporting zinc tartrate's superior absorption or efficacy is limited compared to well-studied forms like zinc picolinate or zinc citrate. Most claims about zinc tartrate's bioavailability advantage are based on theoretical chelation mechanisms rather than robust human clinical trials. While the tartrate chelation is proposed to enhance zinc availability, real-world evidence in humans remains sparse, making direct effectiveness claims difficult to substantiate. More high-quality comparative research is needed to definitively establish zinc tartrate's position among available zinc supplement forms.

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