# Sheep Colostrum Powder (Ovis aries)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/sheep-colostrum-powder
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-03-25
**Evidence Score:** 2 / 10
**Category:** Protein
**Also Known As:** Ovis aries colostrum, Ewe colostrum powder, Sheep first milk powder, Ovine colostrum, Lamb colostrum concentrate, Sheep beestings powder, Ovine immunoglobulin concentrate

## Overview

Sheep colostrum powder (Ovis aries) is the first milk produced by ewes after lambing, concentrated into powder form and rich in bioactive peptides including ACE-inhibitory caseins, [antimicrobial](/ingredients/condition/immune-support) β-casein fragments, and antioxidant κ-casein sequences. These peptides exert measurable effects on [blood pressure regulation](/ingredients/condition/heart-health), pathogen defense, and [oxidative stress](/ingredients/condition/antioxidant) modulation through enzyme inhibition and membrane disruption mechanisms.

## Health Benefits

• Contains ACE-inhibitory peptides (α-casein and κ-casein) with IC50 values of 2.4-28.9 μM - in vitro evidence only
• Provides [antimicrobial](/ingredients/condition/immune-support) peptides (β-casein VMFPPQ) active against gram-negative bacteria - laboratory studies only
• Delivers [antioxidant](/ingredients/condition/antioxidant) κ-casein peptides (HPHPHLSF) that inhibit linoleic acid oxidation - biochemical assays only
• Contains lactoferrin (692 amino acids) that enhances phagocytic activity and immune response - mechanism studies only
• Supplies high-quality proteins including β-lactoglobulin with methionine content - compositional analysis only

## Mechanism of Action

ACE-inhibitory peptides derived from α-casein and κ-casein fractions competitively inhibit angiotensin-converting enzyme with IC50 values ranging from 2.4 to 28.9 μM, reducing the conversion of angiotensin I to the vasoconstrictive angiotensin II. The [antimicrobial](/ingredients/condition/immune-support) peptide VMFPPQ, derived from β-casein, disrupts gram-negative bacterial outer membranes through electrostatic interaction and lipopolysaccharide binding, compromising membrane integrity. Antioxidant κ-casein peptides including the sequence HPHPHLSF scavenge [reactive oxygen species](/ingredients/condition/antioxidant) and inhibit lipid peroxidation by chelating pro-oxidant metal ions and donating hydrogen atoms to free radical chains.

## Clinical Summary

The majority of evidence supporting sheep colostrum powder's bioactive properties comes from in vitro and laboratory studies, with no large-scale randomized controlled trials specifically isolating Ovis aries colostrum in human subjects. ACE-inhibitory activity with IC50 values of 2.4–28.9 μM has been confirmed in cell-free enzymatic assays, and [antimicrobial](/ingredients/condition/immune-support) efficacy of VMFPPQ has been demonstrated against gram-negative strains in bacterial culture models. Broader bovine colostrum human trials (n=20–100 range studies) suggest immunoglobulin and growth factor transfer, but direct extrapolation to sheep-specific colostrum powder in humans remains speculative. The current evidence base supports biological plausibility but cannot confirm clinical endpoints such as [blood pressure](/ingredients/condition/heart-health) reduction or infection prevention in human populations.

## Nutritional Profile

Sheep colostrum powder is a nutrient-dense protein source with a distinct compositional advantage over bovine colostrum in several bioactive fractions. **Macronutrients (per 100 g powder, typical spray-dried):** Protein 45–65 g (predominantly casein ~80% and whey ~20%), Fat 18–28 g (rich in medium-chain fatty acids C6:0–C12:0 comprising ~15–18% of total fat, conjugated linoleic acid (CLA) ~0.8–1.2 g), Carbohydrates 12–20 g (primarily lactose), Ash 5–8 g. Caloric density approximately 420–500 kcal/100 g. **Protein fractions:** Immunoglobulins (IgG 30–80 mg/g, IgA 2–5 mg/g, IgM 3–8 mg/g — notably higher total Ig concentration than bovine colostrum by ~1.5–2×), Lactoferrin 1.5–4.5 mg/g (692 amino acid glycoprotein, iron-binding capacity ~30% saturation), α-Lactalbumin 2–4 mg/g, β-Lactoglobulin 5–12 mg/g, Serum albumin 1–2 mg/g. Casein sub-fractions include αs1-casein, αs2-casein, β-casein, and κ-casein which serve as precursor sequences for bioactive peptides including ACE-inhibitory (IC50 2.4–28.9 μM), [antimicrobial](/ingredients/condition/immune-support) (VMFPPQ from β-casein), and [antioxidant](/ingredients/condition/antioxidant) (HPHPHLSF from κ-casein) peptides. **Growth factors:** IGF-1 50–150 ng/g, IGF-2 10–30 ng/g, TGF-β1 15–50 ng/g, TGF-β2 100–400 ng/g, EGF 5–15 ng/g — concentrations generally 2–5× higher than mature milk. **Minerals:** Calcium 800–1200 mg/100 g (partially bound to casein micelles enhancing bioavailability ~35–40%), Phosphorus 600–900 mg/100 g, Magnesium 80–120 mg/100 g, Zinc 5–12 mg/100 g (bound to casein and lactoferrin improving absorption), Iron 0.5–1.5 mg/100 g (lactoferrin-bound fraction shows enhanced bioavailability), Selenium 15–30 μg/100 g, Sodium 400–600 mg/100 g, Potassium 700–1100 mg/100 g. **Vitamins:** Vitamin A (retinol) 300–900 μg/100 g (colostrum contains 3–5× higher retinol than mature sheep milk), Vitamin E (α-tocopherol) 2–5 mg/100 g, Vitamin D3 0.3–1.0 μg/100 g, Vitamin B12 1.5–4.0 μg/100 g, Riboflavin (B2) 0.8–1.5 mg/100 g, Niacin (B3) 0.5–1.0 mg/100 g, Pantothenic acid (B5) 2–4 mg/100 g, Folate 5–15 μg/100 g, Vitamin C 2–8 mg/100 g (heat-labile, reduced by spray-drying). **Additional bioactive compounds:** Oligosaccharides 0.5–1.5 g/100 g (sialylated oligosaccharides including 3'-sialyllactose and 6'-sialyllactose as predominant species, serving as [prebiotic](/ingredients/condition/gut-health) substrates), Gangliosides 10–20 mg/100 g, Phospholipids (sphingomyelin, phosphatidylcholine, phosphatidylethanolamine) 1–3 g/100 g within the milk fat globule membrane (MFGM) fraction, Lysozyme 0.1–0.5 mg/g, Lactoperoxidase 10–30 μg/g. **Bioavailability notes:** Sheep milk proteins exhibit smaller casein micelle size (~180 nm vs ~200 nm bovine) potentially improving digestibility and peptide release kinetics. The A2-type β-casein predominance in sheep milk (vs A1 in many bovine breeds) may reduce BCM-7 release during digestion. Fat-soluble vitamin bioavailability is enhanced by the naturally homogenized smaller fat globules (~3.3 μm). Mineral bioavailability benefits from caseinophosphopeptide (CPP) formation during digestion, which solubilizes calcium and zinc in the intestinal lumen. Immunoglobulin survival through gastric transit in adults is estimated at 10–25% without enteric protection.

## Dosage & Preparation

No clinically studied dosage ranges for sheep colostrum powder in humans are available from the research provided. Without human clinical trial data, evidence-based dosage recommendations cannot be established. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Sheep colostrum powder is generally considered safe for healthy adults when used as directed, but individuals with dairy or milk protein allergies should avoid it due to cross-reactive casein and whey proteins. Those taking ACE inhibitor medications such as lisinopril or enalapril should exercise caution, as additive [blood pressure](/ingredients/condition/heart-health)-lowering effects from ACE-inhibitory peptides are theoretically possible, though clinically unconfirmed. Pregnant and breastfeeding women should consult a healthcare provider before use, as no dedicated safety studies exist for this population. Individuals with lactose intolerance may experience gastrointestinal discomfort, and immunocompromised individuals should note that colostrum-derived immunoglobulins may interact unpredictably with immune-modulating therapies.

## Scientific Research

No human clinical trials, randomized controlled trials, or meta-analyses evaluating sheep colostrum powder were found in the provided research. The available evidence consists entirely of biochemical composition studies and in vitro bioactivity assays documenting the presence of bioactive compounds rather than clinical efficacy in human populations.

## Historical & Cultural Context

The provided research does not contain information regarding traditional medicine use of sheep colostrum across different medical systems or historical applications. Traditional use documentation is absent from the available sources.

## Synergistic Combinations

Bovine colostrum, lactoferrin, [probiotic](/ingredients/condition/gut-health)s, vitamin D, zinc

## Frequently Asked Questions

### What ACE-inhibitory peptides are found in sheep colostrum powder?

Sheep colostrum powder contains ACE-inhibitory peptides derived from both α-casein and κ-casein fractions, with measured IC50 values ranging from 2.4 to 28.9 μM in enzymatic assays. These peptides competitively block angiotensin-converting enzyme, the enzyme responsible for producing the vasoconstrictive hormone angiotensin II. However, this activity has only been confirmed in vitro, and blood pressure-lowering effects in humans have not been clinically validated for sheep-specific colostrum.

### How does sheep colostrum powder differ from bovine colostrum powder?

Sheep colostrum (Ovis aries) tends to have a distinct peptide profile compared to bovine colostrum, including specific casein-derived sequences like the antimicrobial peptide VMFPPQ and antioxidant fragment HPHPHLSF that may differ in concentration and bioactivity from cow-derived equivalents. Sheep milk is generally higher in fat and protein content than bovine milk, which may concentrate bioactive peptides more densely in the colostrum fraction. Most clinical human research has been conducted on bovine colostrum, making direct comparisons of efficacy difficult.

### What bacteria does the antimicrobial peptide in sheep colostrum target?

The β-casein-derived peptide VMFPPQ found in sheep colostrum powder has demonstrated activity specifically against gram-negative bacteria in laboratory culture studies. Gram-negative bacteria, including species like Escherichia coli and Salmonella, possess an outer lipopolysaccharide membrane that VMFPPQ disrupts through electrostatic binding, compromising cell integrity. These findings are limited to in vitro models and have not been tested in human infection trials.

### Is sheep colostrum powder safe to take with blood pressure medications?

Sheep colostrum powder contains ACE-inhibitory peptides with IC50 values as low as 2.4 μM, which theoretically could have additive effects when combined with pharmaceutical ACE inhibitors like lisinopril, ramipril, or enalapril. While the clinical magnitude of this interaction has not been studied in humans, caution is warranted for individuals on antihypertensive therapy. Patients managing hypertension with medication should consult a physician before adding sheep colostrum powder to their regimen.

### What antioxidant compounds are present in sheep colostrum powder?

Sheep colostrum powder contains the κ-casein-derived antioxidant peptide HPHPHLSF, which has been identified in laboratory studies as capable of inhibiting lipid peroxidation and scavenging reactive oxygen species. The histidine-rich sequence of HPHPHLSF is believed to contribute to its antioxidant capacity through metal ion chelation and hydrogen atom donation to free radical intermediates. As with other bioactivities in this ingredient, antioxidant effects have been confirmed only in cell-free or in vitro models, not in human clinical trials.

### What is the bioavailability of peptides in sheep colostrum powder, and how does stomach acid affect them?

Sheep colostrum peptides, including ACE-inhibitory and antimicrobial compounds, may be partially degraded by gastric proteases and stomach acid before reaching the small intestine where absorption occurs. The bioavailability of intact bioactive peptides depends on their resistance to proteolytic enzymes and the pH environment of the digestive tract. Enteric-coated formulations or consumption with food may help protect some peptides from degradation, though most human bioavailability data for sheep colostrum specifically remains limited.

### Who should avoid sheep colostrum powder, and are there specific health conditions that contraindicate its use?

Individuals with dairy allergies or lactose intolerance should avoid sheep colostrum powder, as it contains milk proteins and lactose derived from sheep milk. People with autoimmune conditions should consult healthcare providers before use, as colostrum's immune-modulating properties may theoretically affect disease activity. Those with kidney disease or on restricted protein diets should also seek medical advice, given the high protein and peptide content of colostrum supplements.

### How does the lactoferrin content in sheep colostrum powder compare to standalone lactoferrin supplements?

Sheep colostrum powder provides lactoferrin (a 692-amino acid iron-binding protein) alongside other bioactive compounds like immunoglobulins and growth factors, whereas standalone lactoferrin supplements contain isolated lactoferrin at standardized concentrations. The synergistic effects of multiple colostrum components may enhance immune function beyond lactoferrin alone, but the exact lactoferrin concentration varies by colostrum product batch. Standalone lactoferrin supplements offer more precise dosing control, while colostrum powder provides a whole-food complex with less predictable lactoferrin levels.

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