# Quail Heart Capsules (Coturnix coturnix)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/quail-heart-capsules
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-04-01
**Evidence Score:** 2 / 10
**Category:** Protein
**Also Known As:** Japanese quail heart capsules, Common quail heart supplements, Pharaoh's quail heart extract, European quail heart pills, Coturnix quail cardiac supplement

## Overview

Quail heart capsules are a whole-food organ meat supplement derived from Coturnix coturnix, providing concentrated coenzyme Q10, heme iron, and cardiac-specific proteins including myosin and troponin. No peer-reviewed clinical evidence currently supports specific health claims for this preparation in humans.

## Health Benefits

• No documented health benefits - No clinical trials or human studies exist for quail heart capsules
• No [cardiovascular](/ingredients/condition/heart-health) effects established - Studies mentioning quail focus on unrelated developmental biology research (PMID: 12729566)
• No traditional medicine applications - Absence of documentation in TCM, Ayurveda, or other traditional systems
• No identified bioactive compounds - No key constituents or mechanisms reported in literature
• No safety profile established - Lack of data on contraindications, interactions, or dosing

## Mechanism of Action

Quail heart tissue contains coenzyme Q10, which participates in [mitochondrial](/ingredients/condition/energy) electron transport chain complexes I through III, theoretically supporting cellular ATP synthesis. Heme iron present in cardiac muscle is absorbed via the HCP-1 transporter with roughly 15–35% bioavailability, superior to non-heme sources. However, no studies have confirmed that encapsulated quail heart delivers these compounds at pharmacologically meaningful concentrations in human subjects.

## Clinical Summary

No human clinical trials, randomized controlled studies, or observational cohort studies have been conducted specifically on quail heart capsules as a dietary supplement. Research indexed under Coturnix coturnix (e.g., PMID: 12729566) addresses developmental biology and embryology, not supplementation outcomes. Extrapolations from general organ meat literature or CoQ10 isolate studies cannot be responsibly applied to this specific product. The current evidence base is insufficient to draw any conclusions regarding efficacy, optimal dosing, or therapeutic application.

## Nutritional Profile

Based on compositional data for quail heart tissue (Coturnix coturnix), extrapolated from fresh quail heart analysis and general avian cardiac muscle composition, since capsule-specific assay data is absent from peer-reviewed literature. Protein content is the dominant macronutrient, estimated at 65–75% by dry weight, composed of myofibrillar proteins including myosin, actin, tropomyosin, and titin — characteristic of striated cardiac muscle. Fat content estimated at 8–15% dry weight, with fatty acid profile including oleic acid (C18:1, ~35–40% of total fatty acids), palmitic acid (C16:0, ~25–30%), stearic acid (C18:0, ~10–15%), and small fractions of arachidonic acid (C20:4n-6) and DHA (C22:6n-3), consistent with poultry organ tissue profiles. Carbohydrate content is negligible (<2% dry weight), primarily as glycogen residues. Micronutrients likely present based on avian cardiac tissue composition: Iron (heme-bound, Fe²⁺) estimated 4–8 mg per 100g fresh weight with high bioavailability (~15–35% absorption) due to heme form; Zinc approximately 3–5 mg per 100g; Coenzyme Q10 (ubiquinone-10) estimated 30–90 mg per 100g fresh cardiac tissue — cardiac muscle is among the richest natural sources of CoQ10 across species; B vitamins including B12 (~10–20 µg/100g), riboflavin/B2 (~0.8–1.2 mg/100g), niacin/B3 (~5–8 mg/100g), and pantothenic acid (~2–4 mg/100g); Selenium approximately 15–30 µg per 100g. Taurine is present as a free amino acid in cardiac muscle, estimated 50–150 mg per 100g fresh weight. Carnitine (L-carnitine) estimated at 20–60 mg per 100g, consistent with other avian heart tissues. Creatine content estimated 300–500 mg per 100g fresh weight. Collagen contributes a minor structural protein fraction (~3–5% of total protein). Capsule encapsulation typically involves freeze-dried or desiccated powder; a standard 500 mg capsule would contain approximately 325–375 mg protein equivalent, with CoQ10 per capsule estimated at 0.15–0.45 mg assuming typical fill weight — substantially lower than therapeutic CoQ10 doses used in clinical contexts (100–300 mg/day). Bioavailability of lipid-soluble compounds including CoQ10 and fat-soluble vitamins from capsule form may be reduced compared to whole food consumption without co-ingested dietary fat. No independent third-party compositional assay data for quail heart capsule products has been identified in the peer-reviewed literature as of early 2025.

## Dosage & Preparation

No clinically studied dosages, forms, or standardization details are available for quail heart capsules. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Quail heart capsules carry a risk of allergic reaction in individuals with poultry or bird allergies, as cardiac muscle proteins such as parvalbumin and tropomyosin are common allergens. The high purine content typical of organ meats may elevate serum uric acid, posing a concern for individuals with gout or hyperuricemia. No documented drug interactions exist in the literature, though the heme iron content could theoretically reduce absorption of levothyroxine, tetracyclines, or bisphosphonates if taken concurrently. Safety data during pregnancy, lactation, and pediatric populations is entirely absent.

## Scientific Research

No human clinical trials, RCTs, or meta-analyses exist for quail heart capsules. Search results incorrectly reference Qiliqiangxin (QLQX) capsules, an unrelated Traditional Chinese Medicine formula for heart failure (PMID: 32024496, PMID: 23747768), which contain no quail ingredients.

## Historical & Cultural Context

No historical or traditional medicine documentation found for quail heart capsules in any traditional system. Quail appears only in modern poultry research contexts, not ethnomedicine.

## Synergistic Combinations

No synergistic ingredients identified due to lack of research

## Frequently Asked Questions

### Do quail heart capsules have any proven health benefits?

No peer-reviewed human clinical trials have been conducted on quail heart capsules specifically. While the tissue contains compounds like coenzyme Q10 and heme iron that have established roles in other research contexts, no study has demonstrated measurable health outcomes from consuming this encapsulated organ product.

### What nutrients are found in quail heart capsules?

Quail heart tissue compositionally contains coenzyme Q10, heme iron, B vitamins including B12, zinc, selenium, and contractile proteins such as myosin heavy chain and troponin. The concentrations in encapsulated form depend heavily on freeze-drying or desiccation methods used by manufacturers, and no standardized assay data exists across commercial products.

### How do quail heart capsules compare to beef heart supplements?

Both are organ meat supplements supplying CoQ10, heme iron, and cardiac muscle proteins, but quail heart capsules have essentially no dedicated research, whereas beef heart has marginally more compositional data available. Dose-per-capsule will differ significantly given the smaller mass of quail cardiac tissue, and no head-to-head comparative study exists for either product.

### Are quail heart capsules safe to take daily?

No safety studies have established a tolerable daily intake or no-observed-adverse-effect level for quail heart capsules. General organ meat consumption guidelines suggest moderation due to purine load and pre-formed vitamin A content, but specific toxicological data for this product is absent. Individuals with gout, poultry allergies, or kidney disease should consult a physician before use.

### What is the recommended dosage for quail heart capsules?

No clinically validated dosage exists for quail heart capsules, as no pharmacokinetic or dose-finding studies have been performed. Commercial products typically suggest one to four capsules daily based on manufacturer discretion rather than evidence. Without standardization data, consumers cannot reliably determine how much CoQ10 or heme iron a given dose actually delivers.

### What is the evidence quality for quail heart capsules compared to other organ meat supplements?

Quail heart capsules lack any clinical trials or human studies establishing efficacy, making them among the least researched organ supplements on the market. In contrast, beef heart and other bovine organ supplements have some observational data and traditional use documentation, though rigorous clinical evidence remains limited across all organ meat supplements. The absence of published research on quail heart specifically means claims about its benefits are not supported by scientific evidence.

### Are there any known allergens or sensitivities associated with quail heart capsules?

Quail heart capsules may trigger reactions in individuals with poultry allergies, as cross-reactivity between different bird species is possible. People with egg allergies should exercise caution, as quail products may carry similar allergenic proteins. If you have a documented poultry or bird-derived food allergy, consult a healthcare provider before taking quail heart supplements.

### Why are quail heart capsules promoted despite the lack of scientific evidence?

Quail heart supplements are marketed based on the general nutrient density of organ meats and traditional beliefs about animal hearts supporting heart health, rather than specific research on quail. Marketing claims often reference the theoretical presence of minerals and amino acids without acknowledging the absence of human studies validating benefits for this specific ingredient. The supplement industry can legally sell products with minimal evidence as long as structure-function claims are avoided, which allows quail heart to remain available without proven efficacy data.

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*Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com*
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