# Ovine Kidney Tissue (Ovis aries)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/ovine-kidney-tissue
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-03-25
**Evidence Score:** 2 / 10
**Category:** Protein
**Also Known As:** Ovis aries kidney extract, Sheep kidney powder, Ovine renal tissue, Lamb kidney supplement, Sheep organ meat extract, Ovine nephritic tissue

## Overview

Ovine kidney tissue (Ovis aries) is a glandular supplement derived from sheep kidneys that contains angiotensin converting enzyme (ACE), a zinc metalloprotease central to [blood pressure regulation](/ingredients/condition/heart-health) via the renin-angiotensin system. Current research on sheep kidney tissue is limited primarily to contaminant studies, with no clinical trials establishing therapeutic benefits in humans.

## Health Benefits

• No documented health benefits - available research focuses solely on contaminant analysis in sheep kidney tissue
• Potential toxicity risk - studies show uranium accumulation in kidneys from mining-exposed sheep (149-176 ng/g vs. 34 ng/g in controls)
• Contains angiotensin converting enzyme (ACE) activity (PMID: 8136703) - though no therapeutic applications studied
• H19 gene expression documented in kidney tissue (PMID: 12490325) - but no supplementation benefits established
• No clinical evidence exists for any therapeutic use in humans

## Mechanism of Action

Ovine kidney tissue contains angiotensin converting enzyme (ACE), a zinc-dependent metalloprotease (EC 3.4.15.1) that cleaves angiotensin I into the vasoconstrictor angiotensin II and degrades the vasodilator bradykinin, thereby influencing [vascular tone](/ingredients/condition/heart-health). Whether orally ingested ACE from animal tissue survives gastric proteolysis and exerts systemic enzymatic activity in humans remains unestablished. Additionally, kidney tissue contains [mitochondrial](/ingredients/condition/energy) enzymes and cofactors such as coenzyme Q10 and cytochrome c oxidase subunits, though their bioavailability from this matrix is not documented.

## Clinical Summary

No controlled human clinical trials have investigated ovine kidney tissue as a dietary supplement for any health outcome. Available published research consists exclusively of environmental contaminant studies, including analyses showing uranium concentrations of 149–176 ng/g dry weight in kidneys of sheep grazing near uranium mining sites, compared to approximately 34 ng/g in control animals. These findings indicate that sheep kidney tissue can bioaccumulate heavy metals, raising concerns about the safety of unsourced glandular products rather than demonstrating therapeutic utility. The evidence base is therefore insufficient to support any health claim for this ingredient.

## Nutritional Profile

Ovine kidney tissue is a nutrient-dense organ meat with a well-characterized macronutrient and micronutrient composition based on general ruminant kidney tissue data. Macronutrients (per 100g raw tissue): Protein: ~16-17g, comprising complete amino acids including lysine (~1.4g), leucine (~1.3g), and arginine (~1.0g); Fat: ~3-4g, with a mixed fatty acid profile including oleic acid, palmitic acid, and small amounts of arachidonic acid; Carbohydrates: <1g; Water: ~78-80g; Calories: ~90-100 kcal. Micronutrients (per 100g): Vitamin B12: ~27-30µg (450-500% RDI - exceptionally high, highest bioavailability form as methylcobalamin); Riboflavin (B2): ~2.0-2.5mg; Niacin (B3): ~7-9mg; Folate: ~80-100µg; Iron (heme form): ~4-5mg (high bioavailability ~25-35%); Zinc: ~2-3mg; Selenium: ~100-150µg (bioavailability ~80%); Copper: ~0.3-0.4mg; Phosphorus: ~230-250mg. Bioactive compounds: Angiotensin converting enzyme (ACE) activity confirmed (PMID: 8136703), though ACE proteins are largely denatured during processing; Coenzyme Q10: ~4-5mg/100g; Carnitine: ~50-60mg/100g; Taurine: ~150-200mg/100g. Critical contamination concern: Uranium accumulates preferentially in renal cortex tissue; mining-exposed sheep show 149-176 ng/g uranium vs. 34 ng/g in controls, representing a 4-5x elevation. H19 gene expression (imprinted growth-regulatory gene) is documented in ovine kidney tissue, relevant to cellular proliferation signaling but of unknown dietary consequence. Bioavailability is generally high for organ-derived nutrients due to the food matrix structure.

## Dosage & Preparation

No clinically studied dosage ranges, forms, or standardization protocols exist for ovine kidney tissue as a supplement. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Ovine kidney tissue carries a documented risk of heavy metal contamination, particularly uranium accumulation, which at elevated concentrations is nephrotoxic and can damage proximal tubule cells in the human kidney. Individuals with existing renal impairment, immunocompromise, or those who are pregnant or breastfeeding should avoid this ingredient due to the absence of safety data and potential for concentrated environmental contaminants. Because the tissue contains ACE, theoretical interactions with ACE inhibitor medications (e.g., lisinopril, enalapril) and angiotensin II receptor blockers cannot be excluded, though no interaction studies exist. Prion disease risk associated with ruminant-derived tissue products, while not specifically documented for ovine kidney supplements, represents an additional theoretical safety concern per regulatory guidance on bovine and ovine materials.

## Scientific Research

No human clinical trials, RCTs, or meta-analyses on ovine kidney tissue as a supplement were identified. Available studies are limited to animal tissue analysis for environmental contaminants, particularly uranium accumulation in sheep grazing near mining sites, and descriptive studies on enzyme distribution (PMID: 8136703) and gene expression (PMID: 12490325).

## Historical & Cultural Context

No historical or traditional medicinal uses of ovine kidney tissue in any systems (including Ayurveda or TCM) are documented in available sources. Sheep (Ovis aries) are primarily noted for agricultural uses like meat and wool production.

## Synergistic Combinations

No synergistic ingredients identified due to lack of therapeutic research

## Frequently Asked Questions

### What is ovine kidney tissue used for in supplements?

Ovine kidney tissue is included in glandular supplement protocols based on the traditional 'like supports like' theory, suggesting that consuming animal kidney tissue supports human kidney function. However, no peer-reviewed clinical studies confirm this benefit, and the only published research on sheep kidney tissue documents heavy metal accumulation rather than therapeutic effects.

### Does ovine kidney tissue contain ACE enzyme?

Yes, sheep kidney tissue contains angiotensin converting enzyme (ACE), a zinc-dependent metalloprotease that plays a central role in regulating blood pressure through the renin-angiotensin system. Whether orally consumed ACE from ovine tissue remains catalytically active after digestion and absorption in humans has not been demonstrated in any published human study.

### Is ovine kidney tissue safe to take as a supplement?

Safety data specific to ovine kidney tissue supplements in humans does not exist. Studies on sheep raised near uranium mining sites recorded kidney uranium concentrations of 149–176 ng/g dry weight, more than four times control levels, indicating that sourcing and testing of raw material is critical. Consumers with kidney disease, those taking ACE inhibitors, and pregnant individuals should avoid this ingredient until safety data are available.

### What heavy metals accumulate in sheep kidney tissue?

Published research demonstrates that uranium is a primary heavy metal that bioaccumulates in ovine kidney tissue, with concentrations reaching 149–176 ng/g dry weight in mining-exposed sheep versus approximately 34 ng/g in unexposed controls. Uranium is a nephrotoxin that damages proximal tubule cells at elevated exposures, making the geographic origin and independent third-party testing of any sheep kidney-derived supplement critically important.

### How does ovine kidney tissue differ from bovine kidney supplements?

Both ovine (sheep) and bovine (cow) kidney glandulars are marketed as organ meat supplements containing renal enzymes, peptides, and cofactors, but they differ in species-specific protein profiles and regulatory scrutiny. Bovine-derived materials face stricter regulatory oversight in some jurisdictions due to BSE (mad cow disease) concerns, while ovine kidney research is dominated by environmental contaminant data rather than any efficacy studies. Neither type has been validated in rigorous human clinical trials for kidney support.

### What does current research actually show about ovine kidney tissue supplementation?

Clinical research on ovine kidney tissue is extremely limited, with published studies focused primarily on contaminant analysis rather than therapeutic efficacy or safety in human supplementation. While ovine kidney tissue does contain angiotensin-converting enzyme (ACE) activity, no human clinical trials have demonstrated any health benefits from supplementing with this ingredient. The lack of rigorous evidence means claims about ovine kidney tissue benefits remain largely unsubstantiated.

### Are there contamination concerns specific to ovine kidney tissue sourced from certain regions?

Yes, ovine kidney tissue can accumulate uranium and other heavy metals from the environment, particularly in sheep raised in mining-exposed areas where uranium levels have been measured at 149-176 ng/g compared to 34 ng/g in unexposed controls. The kidneys are a primary accumulation site for environmental contaminants due to their filtration function, making the geographic origin and environmental exposure history of the source animals critically important. Consumers should seek information about where ovine kidney tissue is sourced and whether contaminant testing has been performed.

### How is ovine kidney tissue typically processed and does processing affect its composition?

Ovine kidney tissue supplements are commonly processed as freeze-dried or desiccated whole organ preparations, though specific processing methods vary by manufacturer and are rarely disclosed in detail. Processing methods can influence enzyme activity, nutrient retention, and potential contaminant concentration, but comparative studies on different processing approaches for ovine kidney are not available in scientific literature. Without standardized processing guidelines or transparency from manufacturers, the actual composition of ovine kidney tissue supplements may vary significantly between products.

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