Cheesemaking Science

How Milk Composition Changes Coagulation

Short answer

Milk composition changes how milk coagulates. Protein and calcium content have the largest effect on set time and curd firmness, and both vary with breed, season, feed, stage of lactation and animal health.

By Bixa Products, Editorial teamUpdated April 18, 20266 min readReviewed by Luis

The variables behind 'the milk is different this month'

Factor	What it tends to change
Protein content	Set time and curd firmness
Calcium content	Aggregation and firmness
Stage of lactation	Protein profile and coagulation behaviour
Season and feed	Overall composition
Somatic cell count / udder health	Coagulation quality and yield
Heat treatment	Protein availability for gel formation

What a cheese business does about it

Get composition data from your milk supplier if you can.
Track set time as a routine measurement, not a curiosity.
Expect to adjust dosage or cutting time seasonally.
Change one parameter per batch so you learn something each time.

About the author

Bixa Products — Editorial team

Educational content written by the Bixa Products team, a family-owned cheesemaking ingredient company specializing in rennet and chymosin. Technical guidance is written conservatively: where a value depends on your milk, process or product, we say so instead of guessing for you.

Family-owned cheesemaking ingredient company
30+ years in the Latin American cheesemaking market
Specialists in rennet, chymosin and milk coagulation

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