How are mesophilic and thermophilic yogurts different from each other?
The primary difference between mesophilic and thermophilic yogurts is the temperature at which they are cultured (fermented).
Mesophilic Yogurt:
Filmjolk, Matsoni, Piima and Viili varieties
- Culturing Temperature: Mesophilic yogurts culture at room temperature, typically between 70-80°F (21-27°C).
- Ease of Preparation: They are easier to make at home because they don’t require extra heating.
- Texture: Mesophilic yogurts tend to be thinner, ranging from spoonable to drinkable, with Viili being a notable exception that has a very thick and ropy texture. The yogurt can also be strained to get a thicker result.
- Flavor: These cultures usually have a milder, more subtly tart flavor compared to thermophilic yogurts.
- Probiotics: Mesophilic yogurts often have a greater diversity of probiotic strains, as they can thrive from the natural bacteria present in the milk due to the room temperature fermentation.
- Yeast Content: They may contain small amounts of yeast due to room temperature fermentation, which can pick up airborne yeast. `
Thermophilic Yogurt:
- Culturing Temperature: These cultures thrive in higher temperatures, around 90-110°F (32-43°C).
- Preparation: Making thermophilic yogurt at home usually requires a yogurt maker or a controlled heat source to maintain the necessary temperature.
- Texture: Thermophilic yogurts are typically thick and more spoonable, with Greek yogurt being a well-known example.
- Flavor: These cultures generally have a stronger tart or sour flavor, which can be adjusted by varying the fermentation time.
- Probiotics: These yogurts usually contain 4-6 probiotic strains selected for desirable traits like taste and potential health benefits.
- Yeast Content: Yeast is unlikely to thrive in the high temperatures used for fermenting thermophilic yogurts.
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