Aprofood offers professional food protein testing services, utilizing advanced analytical techniques and state-of-the-art methodologies to accurately determine protein content in foods from diverse sources, analyze amino acid profiles, and deliver reliable results with rapid turnaround.

Protein in Food Products

Proteins in food come from a wide and diverse range of sources. Understanding the composition and content of proteins in foods helps to accurately analyze the nutritional value and functional properties of foods. Food proteins are mainly found in foods of animal origin. For example, dairy products are rich in whey and casein proteins, eggs are rich in ovalbumin, and meat is rich in collagen. Some foods of plant origin are also rich in protein, such as legumes (soy protein, pea protein) and cereals (wheat protein). Testing for proteins in food helps to guarantee authenticity and safety and to meet regulatory and market demands.

Our Service

Aprofood attaches great importance to the quality of our services. We have a wide range of certified methods as well as a well-established laboratory system to provide our clients with a full chain of protein analysis services from raw materials to finished products. We offer a portfolio of protein testing services covering the following items to meet the different food samples and diverse testing needs of our clients:

Protein Content Test

Kjeldahl Nitrogen Determination, Dumas Combustion and Infrared Rapid Detection accurately determine the total protein content of samples, which is suitable for high-fat and high-sugar samples (e.g., nuts, dairy products), and supports nutrition labeling and screening for adulteration.

Amino Acid Composition Analysis

Essential amino acid content and branched-chain amino acid ratio analysis, covering 20 common amino acid tests, providing key indicators such as Protein Digestibility Corrected Amino Acid Score (PDCAAS). Methods include high-performance liquid chromatography (HPLC), automatic amino acid analyzer (AAA), evaporative light scattering detector (ELSD), etc.

Functional Characterization of Proteins

Texture meter, surface tension meter, gel permeation chromatography (GPC) method to determine the protein emulsification, gel, foaming, water-holding, and other processing characteristics, to guide the optimization of the formulation (such as water retention of meat products, plant-based food texture adjustment).

Specific Protein Detection

We specialize in detecting specific protein components, including whey protein, casein, and soy protein etc., to verify raw materials purity, suitable for allergen control (e.g., casein detection in dairy products) and functional protein verification. Our methodology includes immunoassay (ELISA), protein electrophoresis (SDS-PAGE), etc.

Enzyme Assays

Measurement of pancreatin amylase, protease, lipase, phytase, xylanase by using USP methods, ISO or AOAC published methods, and also by kits for mammalian protein identification.

Applicable Scenarios

• Protein content and adulteration screening in milk, yogurt and milk powder.
• Myofibrillar proteins and functional characterization in ham and sausage.
• Amino acid composition of soy protein powder and pea isolate protein.
• Whey proteins and branched-chain amino acid content testing and functional validation.
• Authenticity of animal protein sources and nutritional value assessment.

Frequently Asked Questions (FAQs)

Aprofood's protein testing service provides accurate analysis of the type, content, and amino acid composition of proteins in food products, helping clients to optimize formulation design, control costs, and ensure product compliance with nutrition labeling and regulatory requirements. Contact us today to discuss your project and learn more about our services.

• Carbohydrate Testing
• Fat Testing
• Vitamin Testing
• Elements Testing
• Antinutrients Testing