
Rennet is an essential element in the cheesemaking process, acting as a binding agent that causes milk to curdle. Traditionally, rennet comes from the stomach lining of a calf, ewe, or kid (baby goat). However, for vegetarians and vegans, cheese made with microbial rennet derived from plants, fungi, mould, or yeast offers a viable alternative. While microbial rennet is less widely used due to inconsistent results and limited availability, it is an option for those seeking vegetarian or vegan cheeses.
| Characteristics | Values |
|---|---|
| Is cheese made with microbial rennet vegan? | Yes, microbial rennet is vegan. |
| Is cheese made with microbial rennet vegetarian? | Yes, microbial rennet is vegetarian. |
| Is cheese made with microbial rennet common? | No, microbial rennet is not widely used due to inconsistent results and limited availability. |
| Is microbial rennet less expensive than animal rennet? | Yes, microbial rennet is less expensive to produce. |
| Is microbial rennet organic? | Yes, microbial rennet is available with organic labelling. |
| Is microbial rennet kosher? | Yes, microbial rennet is available with kosher certification. |
| Is microbial rennet suitable for vegans and vegetarians? | Yes, microbial rennet is suitable for vegans and vegetarians. |
| Is microbial rennet safe for consumption? | Yes, microbial rennet is safe for consumption. |
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What You'll Learn

Microbial rennet is vegan and vegetarian-friendly
Rennet is an essential element of the cheesemaking process. It is used to coagulate or thicken milk into curds. Rennet is traditionally derived from animals, specifically the enzyme chymosin or rennin, which is taken from the stomach lining of a calf, ewe, or kid (baby goat). As a result, cheese made with animal rennet is not vegetarian-friendly.
However, there are several alternative types of rennet that are suitable for vegetarians and vegans. These include vegetable rennet, which is derived from plants with coagulating properties, and microbial rennet, which is the focus of this discussion.
Microbial rennet is a coagulating agent produced by live organisms such as fungi, mold, or yeast. These organisms are grown in a controlled lab environment to produce the desired amount of fungi, mold, or yeast. Microbial rennet is not derived from animals, making it suitable for vegetarians and vegans.
Cheeses produced with microbial rennet can be certified kosher and halal and are generally accepted by the vegetarian community. They tend to have a longer shelf life than cheeses made with animal rennet, and they are also more cost-effective to produce. However, microbial rennet is not widely used due to inconsistent results and limited availability. Additionally, cheese made with microbial rennet can sometimes develop unpleasant flavors.
In summary, microbial rennet is a vegetarian and vegan-friendly alternative to traditional animal rennet. It allows for the production of cheese that meets dietary restrictions without compromising on taste or functionality.
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Microbial rennet is derived from moulds
Rennet is an essential element of the cheesemaking process. It is used to coagulate or thicken milk into curds. Traditionally, rennet comes from animals, specifically the enzyme chymosin or rennin, which is taken from the stomach lining of a calf, ewe, or kid (baby goat). However, microbial rennet, derived from moulds, provides a vegetarian-friendly alternative to animal rennet.
Some moulds have enzymes similar to chymosin, which can be extracted in a lab to make microbial rennet. This type of rennet is not widely used due to its inconsistent results and limited availability. Cheese made with microbial rennet can also develop unpleasant flavours. Despite these challenges, microbial rennet has improved over the years due to the characterization and purification of secondary enzymes, making it possible to produce several high-quality cheeses with this type of rennet.
Microbial rennet derived from moulds is considered vegetarian-friendly, although it is worth noting that its acceptability to the vegetarian community may vary depending on how the chymosin production was originally launched. For example, fermentation-produced chymosin (FPC) is considered by some to be vegetarian-friendly, even though it originates from animal cells. FPC is a new generation of enzymes born from animal cells but is not considered an animal product itself.
While microbial rennet derived from moulds is suitable for vegetarians, it may not be suitable for those following a vegan diet. Veganism excludes all animal products and by-products, and since microbial rennet is produced by the fermentation of moulds, which are considered microorganisms, it may not align with the strict guidelines of a vegan lifestyle. However, some sources do market microbial rennet as vegan, indicating that there may be varying interpretations and standards within the vegan community regarding this topic.
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Microbial rennet is less expensive than animal rennet
Microbial rennet is a vegetarian-friendly coagulant used in the process of making cheese. It is derived from moulds that are able to produce a coagulating enzyme. Microbial rennet is less expensive than animal rennet for several reasons. Firstly, animal rennet is derived from the stomach lining of young ruminants, generally calves, which are also a byproduct of veal production. This means that the availability of animal rennet is limited by the number of calves being reared for veal. On the other hand, microbial rennet is derived from moulds, which can be easily cultured in a laboratory setting.
Secondly, microbial rennet is considered to be more efficient than animal rennet. Fermentation-produced chymosin (FPC), a type of microbial rennet, is created by isolating animal rennet genes and introducing them to microorganisms. FPC is identical to animal-produced chymosin but can be produced in larger quantities. This increased production yield makes microbial rennet less expensive than animal rennet.
Thirdly, animal rennet is traditionally associated with the production of certain types of cheeses, such as Colston Bassett Stilton, Cravero Parmigiano Reggiano, and Marcel Petite Comté. These cheeses are often produced using traditional methods that involve the use of animal rennet. On the other hand, microbial rennet is more commonly used in industrial cheesemaking, where the focus is on efficiency and cost-effectiveness.
Finally, microbial rennet has improved greatly over the years due to advancements in characterization and purification techniques. This has resulted in the reduction of bitter peptide formation and non-specific proteolytic breakdown, which were previously issues with microbial rennet. The improved quality of microbial rennet has made it a more cost-effective option compared to animal rennet.
In conclusion, microbial rennet is less expensive than animal rennet due to its more efficient production methods, wider availability, and improved quality over time. These factors have contributed to the increasing popularity of microbial rennet in industrial cheesemaking, where cost-effectiveness and efficiency are important considerations.
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Microbial rennet is harder to use in the cheesemaking process
Rennet is an essential element of the cheesemaking process. It is a binding agent that causes milk to curdle and thicken. The most common form of rennet used in cheesemaking is animal rennet, which comes from the lining of the fourth stomach of a young ruminant, generally a calf. However, microbial rennet, derived from moulds, is also used in cheesemaking and is considered vegetarian-friendly.
Additionally, the process of making microbial rennet is more complex and requires controlled laboratory conditions to grow the moulds, fungi, or yeast needed for production. This adds to the overall difficulty of using microbial rennet in cheesemaking. Furthermore, the limited availability of microbial rennet means that cheesemakers may have to procure it from specific sources, adding another layer of complexity to the process.
Despite these challenges, some cheesemakers prefer to use microbial rennet due to its advantages. It is less expensive to produce than animal rennet, resulting in lower-cost cheeses. It also has a longer shelf life, with most microbial rennet lasting up to 24 months compared to the 2-3 month shelf life of animal rennet. Additionally, microbial rennet is suitable for vegetarians and can be used to make truly vegetarian cheese.
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Microbial rennet is genetically modifiable
Rennet is an essential element of the cheesemaking process. It is used to coagulate or thicken milk into curds. Traditionally, rennet comes from animals, specifically the enzyme chymosin or rennin, which is taken from the stomach lining of a calf, ewe, or kid (baby goat). However, to cater to vegetarians and vegans, cheesemakers have sought other ways to coagulate milk. These include rennet derived from plants, fungi, or microbial sources.
Microbial rennet is derived from molds that can produce a coagulating enzyme. It is considered vegetarian-friendly. However, it is not widely used because it does not yield consistent results and is tricky to use during the cheesemaking process.
Microbial rennet can be genetically modified. The process involves extracting the chymosin chromosomes from an animal's stomach cells and implanting them into yeast cultures that act as a host. The host culture encourages the growth of new chymosin enzymes, which are then separated and purified. This results in a new generation of enzymes that originated from an animal cell but are not considered an animal product themselves.
The use of genetically engineered rennet is a topic of debate among vegetarians and cheese companies. Some consider it non-GMO and vegetarian-friendly because no animal genes or products are used in each fresh batch of enzymes. They argue that the presence of animal ingredients would make the product non-vegetarian. On the other hand, others question the vegetarian status of cheese made with genetically modified microbial rennet, especially if the FPC (fermentation-produced chymosin) resulted from the laboratory engineering of a calf's genetic material.
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Frequently asked questions
Rennet is a binding agent that causes milk to curdle and is an essential element of the cheesemaking process. It is traditionally derived from animals, specifically the enzyme chymosin or rennin, which is taken from the stomach lining of a calf, ewe, or kid (baby goat).
Yes, microbial rennet is vegan as it does not come from animals. It is derived from fungi, mould, or yeast. However, it is not widely used as it can be tricky to use and can develop unpleasant flavours.
Some cheeses made with microbial rennet include Zimbro, Ruggles Hill Creamery Ada's Honor, and Irish cheeses such as Cashel Blue and Ardrahan.
In the US, cheesemakers are not required to specify what type of rennet they use. However, if a cheese is made with plant-based rennet, the producer will often specify "thistle rennet," "plant rennet," or "vegetarian rennet" on the label. Your best bet is to buy cheese from a knowledgeable cheesemonger, who can point out cheeses that are not made from animal rennet.
























