| Rennet (as a category) | Chymosin (the enzyme) | |
|---|---|---|
| What it is | A milk-coagulating preparation | A specific milk-clotting enzyme |
| Sources | Animal, microbial or plant | Present in animal rennet; also produced by fermentation |
| Role in the vat | Delivers clotting enzymes to the milk | Cleaves kappa-casein to destabilise micelles |
| How cheesemakers talk about it | 'Which rennet do you use?' | 'How specific is the enzyme?' |
What this means when choosing a Bixa product
Bixa Liquid Microbial Rennet and Bixa Liquid Chymosin are both liquid coagulants. The practical question is not which one is 'stronger' — it is which suits the cheese you make and the way you run your process.
- Fresh, quick-turn styles: cheesemakers commonly start with the liquid microbial rennet.
- Pressed, held or aged styles, and processes being standardised for scale: cheesemakers commonly look at liquid chymosin.
Coagulation is never controlled by one variable. Milk composition, temperature, pH, calcium, the cheese style and your process conditions all shape how the curd forms — the coagulant is one input among several.
Frequently asked
Is chymosin stronger than rennet?
That comparison doesn't hold, because chymosin is an enzyme and rennet is a product category. What you can compare is the clotting strength of two specific products, expressed in IMCU.
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