Protein, Peptide & Amino Acid Testing
HPLC-based amino acid profiling and protein content quantification for supplements and functional foods.
Protein and amino acid testing uses HPLC-based analysis to quantify total protein content, profile individual amino acids (including BCAAs), and detect protein spiking — the practice of adding low-cost amino acids to inflate nitrogen-based protein readings.
Accurate protein and amino acid testing is critical for sports nutrition, meal replacement, and protein supplement brands. Qalitex Laboratories provides HPLC-based amino acid analysis and protein quantification methods that go beyond the Kjeldahl/Dumas total nitrogen approach to deliver true protein and individual amino acid data.
Amino Acid Profile Testing
We provide complete amino acid profiling (AAA) using HPLC with pre-column derivatization, covering all essential and non-essential amino acids. This allows verification of label claims for BCAA content (leucine, isoleucine, valine) and total amino acid spectrum.
Protein Content Quantification
We use Kjeldahl, Dumas, and HPLC methods to determine total protein content, verifiable to label claims. For collagen and hydrolyzed proteins, we apply hydroxyproline-based methods to distinguish true protein from non-protein nitrogen sources.
Adulteration & Spiking Detection
Protein spiking — adding low-cost amino acids to inflate nitrogen readings — is a known industry problem. Our comprehensive amino acid profiling detects unusual enrichment of specific amino acids, protecting your brand and customers from adulterated raw materials.
Ensayos y métodos incluidos
- ✓ Complete amino acid profile (AAA)
- ✓ BCAA content verification
- ✓ Total protein quantification
- ✓ Hydroxyproline (collagen testing)
- ✓ Protein spiking detection
Normas y conformidad regulatoria
- USP <1057>
- AOAC 994.12 (amino acids)
- AOAC 990.03 (protein — Dumas)
- FDA cGMP 21 CFR Part 111
Sectores que atendemos
- Sports nutrition brands
- Protein supplement manufacturers
- Meal replacement products
- Collagen & peptide supplements
- Functional food brands
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What is amino acid profile testing?
Amino acid profile testing (AAA) uses HPLC with pre-column derivatization to identify and quantify all essential and non-essential amino acids in a product. This allows verification of BCAA content and total amino acid spectrum for sports nutrition and protein supplements.
What is protein spiking and how does Qalitex detect it?
Protein spiking is the practice of adding low-cost amino acids like glycine or taurine to inflate nitrogen-based protein readings. Qalitex detects spiking through comprehensive amino acid profiling that reveals unusual enrichment of specific amino acids.
How does Qalitex test collagen protein content?
For collagen and hydrolyzed proteins, Qalitex applies hydroxyproline-based methods that distinguish true collagen protein from non-protein nitrogen sources, providing accurate quantification beyond standard Kjeldahl or Dumas total nitrogen methods.
Páginas de ensayos especializados
Protein & Peptide Testing for FDA compliance
protein peptide testing for FDA compliance
Protein & Peptide Testing for Amazon listing approval
protein peptide testing for Amazon listing approval
Protein & Peptide Testing for Regulatory submission
protein peptide testing for regulatory submission
Protein & Peptide Testing Near Irvine & San Diego, CA — ISO 17025 Accredited Lab
protein peptide testing near me
Protein & Peptide Testing for Product launch
protein peptide testing for product launch
Protein & Peptide Testing for Quality control
protein peptide testing for quality control
Por qué las marcas eligen Qalitex para protein, peptide & amino acid testing
Entrega en 48 h
CoA firmado en 48–72 horas
Acceso directo al científico
Hable con el químico que realiza sus ensayos
Sin pedido mínimo
1 SKU o 100 — la misma calidad
Artículos relacionados
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Nitrogen spiking inflates protein content on supplement labels. Learn how it works, which tests expose it, and what brands must demand from their COA.
Dietary SupplementsCollagen Supplement Testing: What Third-Party Labs Actually Find
Collagen supplement testing reveals surprising label gaps. Learn what hydroxyproline HPLC, ICP-MS, and molecular weight analysis actually find in products.
Dietary SupplementsCollagen Peptides Lab Testing: Authenticity, Hydrolysis Verification, and Label Claim Accuracy
Amino acid profiling, molecular weight distribution, and species verification for collagen powders — how brands prove premium positioning with analytical data.
Dietary SupplementsThe Mycotoxin Risk Nobody Talks About in Protein Powders
Aflatoxin and ochratoxin contamination in pea, rice, and hemp protein powders is underdetected. Here's what a complete mycotoxin testing panel should cover.
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Solicitar presupuesto →Aviso legal: Los resultados de los ensayos proporcionados por Qalitex Laboratories son datos analíticos destinados a fines de control de calidad. No constituyen asesoramiento legal, regulatorio ni de conformidad. Los clientes son los únicos responsables de garantizar que sus productos cumplen todas las normativas federales, estatales y locales aplicables.