Zinc Orotate Dihydrate

Zinc orotate dihydrate is a chelated form of zinc bound to orotic acid (vitamin B13) with two water molecules, theorized to enhance cellular zinc delivery via orotic acid's role in pyrimidine biosynthesis pathways. It supplies elemental zinc, an essential cofactor for over 300 enzymes including carbonic anhydrase, DNA polymerase, and superoxide dismutase.

Origin & History

Zinc orotate dihydrate is a synthetic coordination compound formed by chelating zinc ions with orotic acid (a pyrimidine carboxylic acid), with the molecular formula C₁₀H₁₀N₄O₁₀Zn. It has no natural origin and is manufactured chemically by reacting zinc salts with orotic acid, classified as a metal-organic complex in the chemical class of zinc carboxylates.

Historical & Cultural Context

No historical or traditional medicine uses are documented in the research sources. The compound appears to be a modern synthetic creation with no traditional usage history.

Health Benefits

• No health benefits can be cited as no human clinical trials, RCTs, or meta-analyses for zinc orotate dihydrate were found in the research
• The research dossier provides no evidence of therapeutic effects
• No studies with health outcomes are available to reference
• No clinical evidence exists in the provided sources
• Benefits cannot be determined from the available research data

How It Works

Zinc orotate dihydrate dissociates in the gastrointestinal tract, releasing zinc ions and orotic acid; the chelate bond is proposed to facilitate passive diffusion across intestinal enterocyte membranes via lipid solubility, potentially improving absorption over inorganic zinc salts. Once absorbed, zinc acts as a structural cofactor in zinc-finger transcription factors (e.g., Sp1, GATA family) and catalytic center of metalloenzymes including matrix metalloproteinases and alcohol dehydrogenase. Orotic acid independently enters pyrimidine synthesis as a precursor to UMP via the enzyme UMP synthase, though whether this pathway meaningfully augments zinc transport remains undemonstrated in controlled human trials.

Scientific Research

No human clinical trials, RCTs, or meta-analyses for zinc orotate dihydrate were identified in the research sources. No PubMed PMIDs, study designs, sample sizes, or clinical outcomes are available in the provided literature.

Clinical Summary

No human clinical trials, randomized controlled trials, or meta-analyses specifically examining zinc orotate dihydrate as an isolated compound have been identified in the peer-reviewed literature as of 2024. General zinc supplementation research—using forms such as zinc gluconate, zinc sulfate, and zinc acetate—demonstrates benefits for immune function, wound healing, and testosterone maintenance in deficient populations, but these findings cannot be directly extrapolated to zinc orotate dihydrate without form-specific bioavailability data. One small comparative study by Eby (2004, not peer-reviewed RCT) claimed superior bioavailability for zinc orotate, but no independent replication exists. The evidence base for this specific compound is therefore insufficient to support efficacy claims.

Nutritional Profile

Zinc Orotate Dihydrate is a chelated zinc salt in which zinc is bound to orotic acid (vitamin B13) with two water molecules incorporated into the crystal structure. Elemental zinc content: approximately 17-20% by molecular weight (zinc orotate dihydrate molecular weight ~461 g/mol; zinc atomic weight ~65.4 g/mol). Orotic acid content: approximately 2 orotate molecules per zinc ion, constituting the majority of remaining molecular mass. The dihydrate component contributes 2 water molecules per formula unit. As a mineral supplement, it contains no meaningful macronutrients (protein, fat, carbohydrate), no caloric value, and no vitamins. The chelated form theoretically enhances zinc bioavailability compared to inorganic zinc salts (e.g., zinc oxide) due to improved gastrointestinal stability and reduced competition with other minerals for absorption transporters; however, direct comparative bioavailability data from human clinical trials specific to zinc orotate dihydrate are not established in available research sources. Zinc itself is an essential trace mineral involved in enzymatic cofactor roles (>300 enzymes), immune signaling, protein synthesis, and DNA metabolism, with a recommended dietary allowance of 8-11 mg elemental zinc/day for adults. Orotic acid is a naturally occurring pyrimidine precursor compound found in small amounts in dairy products.

Preparation & Dosage

No clinically studied dosage ranges or standardization details are reported in the available research. Consult a healthcare provider before starting any new supplement.

Synergy & Pairings

Other zinc forms, vitamin C, quercetin, copper, magnesium

Safety & Interactions

Zinc orotate dihydrate carries the same general safety profile as other zinc supplements; the tolerable upper intake level (UL) for elemental zinc is 40 mg/day for adults, with acute toxicity (nausea, vomiting, metallic taste) reported above approximately 50 mg elemental zinc. Chronic excess zinc supplementation (>50 mg/day long-term) can antagonize copper absorption by inducing intestinal metallothionein, potentially causing copper-deficiency anemia and neurological symptoms. Drug interactions include reduced absorption of fluoroquinolone and tetracycline antibiotics when taken concurrently, and zinc may reduce the efficacy of penicillamine. Pregnancy safety follows standard zinc guidelines (RDA 11 mg/day; UL 40 mg/day), and the orotic acid component raises a theoretical concern since high-dose orotic acid has shown hepatotoxic effects in animal models, though no such effects have been documented at supplemental doses in humans.