# Hematoxylin **Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/hematoxylin **Data Source:** Hermetica Superfoods Ingredient Encyclopedia **Updated:** 2026-03-29 **Evidence Score:** 2 / 10 **Category:** Other **Also Known As:** Haematoxylon, Natural Black 1, C.I. 75290, Logwood extract, Campeche extract, Haematoxylum campechianum extract, Hematoxylol, Brazilwood extract ## Overview Hematoxylin is a natural dye extracted from the heartwood of Haematoxylum campechianum that functions through its oxidized form, hematein, which chelates metal ions such as aluminum and iron to form colored complexes. It is not a dietary supplement and has no established role in human health when consumed; its applications are exclusively laboratory-based, primarily in histological staining of cell nuclei. ## Health Benefits • No health benefits for human consumption have been clinically evaluated. • Adequate nuclear staining in 96.66-98.33% of histological sections (PMID: 22529574). • Superior differentiation in squamous cell carcinoma compared to toluidine blue (PMID: 8780761). • [Oxidative stress](/ingredients/condition/antioxidant) indications in Alzheimer's brain regions (in vitro, PMID not specified). • Staining efficacy in histological applications rather than therapeutic benefits. ## Mechanism of Action Hematoxylin itself is not biologically active until oxidized to hematein, either spontaneously or via oxidizing agents such as sodium iodate or potassium permanganate. Hematein forms coordinate covalent bonds with mordant metal cations, typically aluminum (in alum-hematoxylin formulations) or iron (in Weigert's or Heidenhain's formulations), creating a positively charged dye-metal complex that binds electrostatically to negatively charged phosphate groups on DNA and RNA within cell nuclei. This binding produces the characteristic blue-to-violet nuclear staining used in hematoxylin and eosin (H&E) preparations, the global standard for histopathological diagnosis. ## Clinical Summary Hematoxylin has not been evaluated in any clinical trial for human health benefits, as it is a histological reagent rather than a therapeutic agent. Laboratory studies demonstrate that hematoxylin-based staining achieves adequate nuclear staining in 96.66–98.33% of histological sections, as reported in comparative staining research (PMID: 22529574). One study found hematoxylin superior to toluidine blue for cellular differentiation in squamous cell carcinoma specimens (PMID: 8780761). Additional research has used hematoxylin staining as a diagnostic tool to visualize [oxidative stress](/ingredients/condition/antioxidant) markers in Alzheimer's disease tissue, underscoring its role as a research instrument rather than a treatment. ## Nutritional Profile Hematoxylin is a naturally occurring polyphenolic compound (C16H14O6, MW: 302.28 g/mol) extracted primarily from the heartwood of the logwood tree (Haematoxylum campechianum). It is NOT a nutritional ingredient and has no established macronutrient or micronutrient profile relevant to human consumption. Biochemically, it belongs to the hydroxybrazilin class of natural dyes. As a pure compound: negligible caloric value, no meaningful protein, fat, or carbohydrate content. It contains multiple hydroxyl groups (-OH) at positions 3, 4, 6, and 7, contributing to its chelating and antioxidant chemical properties in vitro. In its oxidized form (hematein, C16H12O6), it forms coordinate complexes with metallic mordants (commonly aluminum, iron, tungsten). Bioactive profile: exhibits in vitro [antioxidant activity](/ingredients/condition/antioxidant) via polyphenolic structure; demonstrated inhibition of topoisomerase II in cell studies; shows chelation of Al³⁺, Fe³⁺, and other divalent/trivalent cations. Bioavailability for human consumption: not characterized or established, as oral ingestion is contraindicated — the compound is classified as a laboratory/histological reagent, not a food ingredient. No dietary reference intakes (DRIs), tolerable upper limits, or nutritional equivalents exist for this substance. ## Dosage & Preparation There are no clinically studied dosage ranges for hematoxylin as a therapeutic agent. In histology, it is applied as a 1% aqueous or alcoholic solution. Consult a healthcare provider before starting any new supplement. ## Safety & Drug Interactions Hematoxylin is not intended for human ingestion and no safe or therapeutic oral dose has been established. It is classified as a potential irritant and sensitizer in occupational settings, with skin and mucous membrane irritation reported upon direct contact in laboratory environments. No drug interaction data exists in a clinical pharmacology context because hematoxylin is not administered to patients. Ingestion or parenteral exposure should be treated as a toxic event, and the substance is contraindicated for use in any form in pregnant women or any human population outside of external diagnostic laboratory applications. ## Scientific Research The available studies focus on hematoxylin's use as a histological stain rather than a therapeutic compound. Notable studies include a single-blinded experimental design assessing staining quality (PMID: 22529574) and a pilot study in Mohs surgery (PMID: 8780761). ## Historical & Cultural Context Hematoxylin has no historical or traditional medicinal use in systems like Ayurveda or TCM. Its primary role since the 19th century has been as a synthetic histological dye, with ongoing lab adaptations. ## Synergistic Combinations Iron, Aluminum, Xylene substitutes, Methanol substitutes ## Frequently Asked Questions ### Can you take hematoxylin as a supplement? No, hematoxylin is not a dietary supplement and should not be consumed. It is a histological dye derived from Haematoxylum campechianum used exclusively in laboratory tissue staining, and no safe ingestion dose has been established for humans. ### What is hematoxylin used for in medicine? Hematoxylin is used in histopathology laboratories as part of the hematoxylin and eosin (H&E) staining protocol, the worldwide standard for diagnosing diseases including cancer. Its oxidized form, hematein, chelates aluminum or iron mordants to stain cell nuclei blue-violet, allowing pathologists to evaluate tissue architecture and cellular morphology. ### What is the difference between hematoxylin and hematein? Hematoxylin is the raw colorless-to-pale compound extracted from logwood; it must be oxidized to hematein to become an effective dye. Hematein is the active chromophore that binds metal mordants like aluminum or iron and then attaches to nuclear DNA and RNA, producing the characteristic dark blue-purple staining seen in histological slides. ### Is hematoxylin the same as an anthraquinone supplement? Although hematoxylin is categorized under dihydroxyanthraquinone compounds structurally, it is distinct from anthraquinone-based supplements such as aloe emodin or cascara sagrada, which are evaluated for laxative or other biological effects. Hematoxylin has no documented pharmacological activity in humans and no clinical evidence supporting supplementation. ### What plant does hematoxylin come from? Hematoxylin is extracted from the heartwood of Haematoxylum campechianum, commonly called the logwood tree, native to Central America and the Caribbean. The dried and chipped heartwood is processed to yield hematoxylin crystals, which have been used in textile dyeing and biological staining since the 16th century. ### What does clinical research show about hematoxylin's effectiveness as a diagnostic tool? Hematoxylin demonstrates strong clinical utility in histological staining, achieving adequate nuclear staining in 96.66-98.33% of tissue sections and showing superior differentiation capabilities compared to alternative stains like toluidine blue, particularly in squamous cell carcinoma identification. However, it is important to note that hematoxylin is used exclusively as a laboratory staining agent for tissue examination rather than as a supplement for human consumption. Current research does not support any health benefits from oral hematoxylin intake. ### Is hematoxylin safe to use in laboratory and medical settings? Hematoxylin has a well-established safety profile when used as a histological stain in controlled laboratory and clinical diagnostic environments. Its widespread use in pathology for over a century demonstrates consistent reliability and minimal adverse effects in professional medical applications. However, hematoxylin is not formulated or intended for human oral consumption as a supplement. ### What is the difference between hematoxylin's staining applications and supplement claims? Hematoxylin's primary scientifically-validated application is as a histological dye for microscopic tissue examination, where it binds to cellular components and enables differentiation of cancer cells and tissue structures. In contrast, hematoxylin has not undergone clinical evaluation for any purported health benefits when taken as an oral supplement, and no evidence supports its use in supplement form. The distinction is critical: hematoxylin's proven efficacy is limited to laboratory diagnostic use, not systemic human health applications. --- *Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com* *License: CC BY-NC-SA 4.0 — Attribution required. Commercial use: admin@hermeticasuperfoods.com*