Iron Lactate

Iron lactate is a chelated iron compound that combines ferrous iron with lactic acid for enhanced bioavailability. This form provides elemental iron while potentially reducing gastrointestinal irritation compared to other iron supplements.

Origin & History

Iron lactate, primarily ferrous lactate (iron(II) lactate), is a synthetic compound formed by reacting lactic acid with iron sources such as ferrous sulfate or iron filings. It exists as a greenish-white powder or crystalline mass with molecular formula C₆H₁₀FeO₆, and is sparingly soluble in water.

Historical & Cultural Context

No historical or traditional medicine uses documented. Iron lactate is described solely as a modern synthetic compound without traditional context in systems like Ayurveda or Traditional Chinese Medicine.

Health Benefits

• No clinical health benefits documented - research focuses only on chemical properties
• Used as food additive (E585) for acidity regulation - safety implied but not studied
• Provides bioavailable iron source - theoretical benefit based on iron content, no specific studies
• May support color retention in foods - regulatory approval suggests safety profile
• Potential iron supplementation - no evidence quality available from current research

How It Works

Iron lactate dissociates in the acidic gastric environment, releasing ferrous iron (Fe2+) which is absorbed in the duodenum via divalent metal transporter 1 (DMT1). The lactate chelation protects iron from precipitation and oxidation, maintaining it in the more bioavailable ferrous state. Once absorbed, iron is transported by transferrin and incorporated into hemoglobin or stored as ferritin.

Scientific Research

No human clinical trials, randomized controlled trials, or meta-analyses specifically examining iron lactate were identified in the available research. The provided sources focus exclusively on chemical properties and industrial applications rather than biomedical studies.

Clinical Summary

No specific clinical trials have evaluated iron lactate's health benefits or efficacy compared to other iron forms. Research focuses primarily on its chemical properties and stability as a food additive (E585). While theoretical bioavailability advantages exist due to its chelated structure, controlled human studies comparing absorption rates and tolerability versus ferrous sulfate or other iron compounds are lacking. Evidence for therapeutic benefits remains limited to iron's general physiological functions.

Nutritional Profile

Iron lactate (ferrous lactate, Fe(C₃H₅O₃)₂) is an iron(II) salt of lactic acid with a molecular weight of ~233.99 g/mol. It contains approximately 23.8% elemental iron by weight (Fe²⁺). As a mineral compound, it has no macronutrient content (no protein, fat, carbohydrates, or fiber). Key nutritional characteristics: • Provides ferrous (Fe²⁺) iron, which is generally more bioavailable than ferric (Fe³⁺) forms, with estimated absorption rates of 10–30% depending on individual iron status, gastric pH, and co-consumed dietary factors. • The lactate anion (C₃H₅O₃⁻) is a naturally occurring organic acid that enhances aqueous solubility (~96 g/L at 25°C), contributing to improved intestinal absorption compared to less soluble iron salts such as ferrous oxide. • Typical food-additive dosages (E585) range from 10–150 mg/kg in olives and related products; supplemental iron doses providing 15–65 mg elemental iron per serving would require approximately 63–273 mg iron lactate. • Contains no vitamins, polyphenols, or other bioactive compounds beyond the iron and lactate moieties. • Bioavailability is enhanced by co-ingestion with ascorbic acid (vitamin C), organic acids, and animal protein; inhibited by phytates, polyphenols, calcium, and tannins. • The lactate component (~76.2% by weight) is metabolically inert at typical supplemental doses, readily metabolized via the Cori cycle/gluconeogenesis. • No significant amounts of other minerals or trace elements are present in pharmaceutical/food-grade preparations (purity typically ≥98%). • Caloric contribution is negligible (<1 kcal per typical serving). • Iron from ferrous lactate contributes to hemoglobin synthesis, oxygen transport, electron transport chain function, and enzymatic cofactor roles, consistent with general iron physiology rather than compound-specific bioactivity.

Preparation & Dosage

No clinically studied dosage ranges available. The compound is noted as a pharmaceutical reference standard but without therapeutic dosing information. Consult a healthcare provider before starting any new supplement.

Synergy & Pairings

Vitamin C, folic acid, vitamin B12, copper, ascorbic acid

Safety & Interactions

Iron lactate safety profile is inferred from its approved use as food additive E585, but specific toxicology studies are limited. As with all iron supplements, it may cause gastrointestinal side effects including nausea, constipation, and stomach upset, though potentially less than non-chelated forms. Iron supplements can reduce absorption of tetracycline antibiotics, levothyroxine, and bisphosphonates when taken concurrently. Contraindicated in hemochromatosis and should be used cautiously during pregnancy only under medical supervision.