# Lamb Spleen Extract

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/lamb-spleen-extract
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-04-04
**Evidence Score:** 2 / 10
**Category:** Protein
**Also Known As:** Ovine spleen extract, Sheep spleen extract, Ovis aries spleen extract, Lamb splenic tissue extract, Ovine splenic extract, LSE

## Overview

Lamb spleen extract is a concentrated source of bioactive peptides, heme iron, and splenopentin-like [immunomodulatory](/ingredients/condition/immune-support) compounds derived from ovine splenic tissue. Its primary proposed mechanism involves upregulation of macrophage phagocytic activity through CD163 and CD68 receptor pathways, potentially supporting innate immune function.

## Health Benefits

• No human clinical trials have been conducted on lamb spleen extract, limiting evidence for health benefits
• Animal studies suggest potential [immune modulation](/ingredients/condition/immune-support) via increased macrophage activity (CD163/CD68 markers, p<0.001) in lamb spleen tissue
• Selenium-enriched lamb spleen showed altered lipid profiles with higher hypocholesterolemic/hypercholesterolemic fatty acid ratios in animal models
• May support immune cell function based on the spleen's role in blood filtration and immune response (theoretical benefit, no human evidence)
• Current evidence is limited to animal studies without established human health benefits

## Mechanism of Action

Lamb spleen extract contains splenopentin-analog peptides and tuftsin-like sequences that may bind to macrophage surface receptors, including CD163 (a hemoglobin-haptoglobin scavenger receptor) and CD68, stimulating phagocytic activity and [pro-inflammatory cytokine](/ingredients/condition/inflammation) modulation. Heme iron within the extract is absorbed via the HCP-1 (heme carrier protein-1) transporter in intestinal enterocytes, offering superior bioavailability compared to non-heme iron sources. Selenium-enriched variants may additionally activate [glutathione](/ingredients/condition/detox) peroxidase (GPx) pathways, influencing [lipid peroxidation](/ingredients/condition/antioxidant) and oxidative stress markers.

## Clinical Summary

No published human randomized controlled trials have evaluated lamb spleen extract specifically, representing a significant gap in the clinical evidence base. Animal model studies have demonstrated statistically significant increases in macrophage activation markers CD163 and CD68 (p<0.001) in splenic tissue of treated subjects, suggesting genuine [immunomodulatory](/ingredients/condition/immune-support) potential. Research on selenium-enriched lamb spleen preparations in animal models indicated measurable alterations in lipid [metabolism](/ingredients/condition/weight-management) profiles, though effect sizes and clinical relevance for humans remain undefined. The current evidence level is preclinical only, and extrapolation to human therapeutic benefit requires rigorous controlled trials.

## Nutritional Profile

Lamb spleen extract is a protein-rich organ meat derivative. Based on whole lamb spleen composition and concentrated extract data: **Macronutrients (per 100g raw spleen basis):** Protein ~18–20g (predominantly heme proteins, immunoglobulins, and splenic peptides); Fat ~3–5g (including phospholipids and arachidonic acid); Carbohydrates <1g. **Key Micronutrients:** Iron 35–45mg/100g in concentrated extract form (predominantly heme iron with ~20–25% bioavailability, significantly higher than non-heme sources at 2–5%); Zinc ~3–4mg/100g; Selenium ~15–30µg/100g (selenium-enriched variants may contain 50–120µg/100g); Vitamin B12 ~7–12µg/100g; Vitamin C ~15–28mg/100g (spleen is one of the few organ meats containing appreciable ascorbic acid); Folate ~4–6µg/100g; Niacin (B3) ~7–9mg/100g; Riboflavin (B2) ~0.3–0.5mg/100g; Copper ~0.3–0.5mg/100g; Phosphorus ~200–250mg/100g. **Bioactive Compounds:** Tuftsin (Thr-Lys-Pro-Arg tetrapeptide, naturally produced in spleen, stimulates phagocytic activity); Splenopentin (Arg-Lys-Glu-Val-Tyr [immunomodulatory](/ingredients/condition/immune-support) pentapeptide); Defensins and other antimicrobial peptides; Heme iron-binding proteins including ferritin and hemosiderin (major iron storage forms in splenic tissue); Immunoglobulin fragments (IgG, IgM); [Cytokine](/ingredients/condition/inflammation) precursor peptides. **Bioavailability Notes:** Heme iron from spleen extract is among the most bioavailable dietary iron sources; peptide bioactives may undergo partial degradation during [digestion](/ingredients/condition/gut-health), though some splenic peptides (particularly tuftsin) show resistance to gastrointestinal proteolysis; encapsulated or freeze-dried extract forms may preserve bioactive peptide integrity better than heat-processed versions; phospholipid content may enhance absorption of fat-soluble micronutrients.

## Dosage & Preparation

No clinically studied dosage ranges for Lamb Spleen Extract in humans are available. Animal studies used dietary incorporation methods without specified extract doses. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Lamb spleen extract is generally considered food-safe for individuals without known meat or offal allergies, but allergic reactions including urticaria or anaphylaxis are possible in sensitive individuals. Those taking iron supplementation or anticoagulants such as warfarin should use caution, as the high heme iron content may alter iron absorption kinetics and potentially interact with drug [metabolism](/ingredients/condition/weight-management). Individuals with hemochromatosis, iron overload disorders, or gout should avoid organ meat concentrates due to high purine and iron content. Safety during pregnancy and lactation has not been established in controlled studies; pregnant individuals should consult a healthcare provider before use.

## Scientific Research

No human clinical trials, RCTs, or meta-analyses were identified specifically for Lamb Spleen Extract. The only related human study was a multicenter RCT (PMID: 41184719) on lamb's tripe extract (stomach-derived, not spleen) combined with vitamin B12 for chronic atrophic gastritis, which showed improved histopathological response rates but is not directly applicable to spleen extract.

## Historical & Cultural Context

No historical or traditional medicine uses for Lamb Spleen Extract are documented in the available research. While spleen tissue has been studied in animal [immunity](/ingredients/condition/immune-support) models, there are no established ties to traditional medicine systems.

## Synergistic Combinations

Vitamin B12, selenium, immune-supporting nutrients, other organ extracts

## Frequently Asked Questions

### What is lamb spleen extract used for?

Lamb spleen extract is primarily marketed to support immune function and provide highly bioavailable heme iron. Animal research indicates it may activate macrophages via CD163 and CD68 pathways, though no human clinical trials currently confirm these effects in people.

### Does lamb spleen extract contain iron?

Yes, lamb spleen is naturally rich in heme iron, which is absorbed through the HCP-1 intestinal transporter at rates significantly higher than non-heme plant-based iron. This makes lamb spleen extract a candidate supplement for individuals with iron-deficiency anemia, though clinical dosing data in humans is lacking.

### Is lamb spleen extract safe to take daily?

There is no established safe upper limit or standardized daily dosage for lamb spleen extract in humans based on clinical trials. It is generally considered food-equivalent for most healthy adults, but those with hemochromatosis, gout, or meat allergies should avoid it, and long-term daily use has not been formally studied for safety.

### How does lamb spleen extract support the immune system?

Preclinical studies suggest lamb spleen extract contains splenopentin-analog and tuftsin-like peptides that interact with macrophage surface receptors, promoting phagocytic activity and innate immune signaling. In animal tissue studies, CD163 and CD68 macrophage markers were significantly elevated (p<0.001), indicating immune cell activation, but this has not been replicated in human trials.

### What is the difference between lamb spleen extract and beef spleen extract?

Both are organ meat concentrates containing heme iron, immunomodulatory peptides such as tuftsin and splenopentin, and coenzyme Q10, but their specific peptide profiles and selenium content vary by species and animal diet. Lamb spleen extract has been specifically studied in selenium-enrichment contexts showing altered lipid metabolism in animal models, while beef spleen extract has a slightly broader but still predominantly preclinical research base. Neither has sufficient human trial data to establish superiority over the other.

### What does scientific research actually show about lamb spleen extract's effectiveness?

Currently, no human clinical trials have been conducted on lamb spleen extract, so evidence for its health benefits in people remains limited. Animal studies suggest it may increase macrophage activity (immune cells), with research showing significant changes in CD163 and CD68 markers, but these results cannot be directly applied to humans without further clinical investigation. This lack of human data means health claims should be viewed cautiously until more rigorous studies are completed.

### Is lamb spleen extract safe for children and elderly individuals?

Safety data specifically for children and elderly populations has not been formally established through clinical studies, making personalized medical guidance essential before use in these groups. While organ meats are traditionally consumed across age groups in various cultures, supplemental concentrates differ from whole food sources in dosage and processing. Consulting a healthcare provider is recommended before giving lamb spleen extract to children or elderly individuals, particularly those with existing health conditions or medications.

### How does the selenium content in lamb spleen extract affect its benefits?

Animal studies show that selenium-enriched lamb spleen tissue demonstrates altered lipid profiles with higher ratios of beneficial fatty acids, suggesting selenium may enhance certain metabolic effects. However, the practical significance of these findings for human supplementation has not been clinically validated. The selenium content can vary significantly depending on the selenium levels in the source animals' diet and the extraction process used.

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