Micellar Casein Isolate

What Is Micellar Casein Isolate?

Micellar casein is the predominant protein in cow's milk, making up approximately 80% of total milk protein. In its native state it exists in colloidal aggregates called micelles — complex structures of casein proteins with calcium phosphate clusters. Micellar casein isolate is produced by membrane filtration processes (microfiltration) that gently concentrate casein while preserving the micellar structure, unlike sodium caseinate or calcium caseinate, which are produced by chemical precipitation and lose the micellar architecture. The preserved micellar structure is responsible for the key functional distinction: it causes casein to gel in the acidic environment of the stomach, dramatically slowing gastric emptying and producing a sustained, prolonged release of amino acids into the bloodstream.

Specification & Form

How It's Sourced

YNP Ingredients sources Micellar Casein Isolate from certified manufacturers in China, supplied in bag packaging with FSSAI-compliant documentation.

Applications

• Bedtime and overnight recovery protein supplements
• Sustained-release protein blends (often combined with whey protein to provide both fast and slow amino acid delivery)
• Meal replacement products where prolonged satiety is a design goal
• High-protein foods and functional nutrition products

Industries Served

Sports Nutrition · Nutraceuticals/Dietary Supplements · Functional Food/Beverage

Buyer Checklist

• Confirmed "micellar casein isolate" vs "caseinate" — the two products have different processing histories and functional properties
• Confirmed 15 kg pack size suits production volume planning
• COA confirming protein % and relevant quality parameters
• FSSAI-compliant documentation confirmed
• Sourcing from China documented in FSSAI import records

Common Mistakes

Treating caseinate and micellar casein as interchangeable. Sodium caseinate and calcium caseinate lose the micellar structure during processing and may behave differently in formulation — particularly in terms of gelation characteristics and mouthfeel in acidic environments.

Using micellar casein in applications where fast-digesting protein is the goal. Its slow digestion is a feature for recovery and satiety — not for post-exercise protein synthesis applications where rapid amino acid delivery matters more.