why one teaspoon of curd is added in warm milk in the beginning?



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Yogurt is made through the fermentation of milk by certain beneficial bacteria, primarily strains of Lactobacillus and Streptococcus. These bacteria consume the lactose (milk sugar) in the milk and convert it into lactic acid, which gives yogurt its characteristic tangy flavor and thick texture. By adding a teaspoon of curd, which already contains these beneficial bacteria, you're introducing the starter culture that kickstarts the fermentation process

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Accelerated Fermentation: By adding a small amount of curd as a starter, you're ensuring that the milk is inoculated with a significant number of bacteria right from the beginning. This accelerates the fermentation process and helps prevent the growth of unwanted or harmful bacteria. Consistency and Flavor: Using a starter culture from a previous batch or commercial yogurt ensures that you have a consistent product in terms of taste, texture, and thickness. It's a way to replicate a successful batch of yogurt. Maintaining Bacterial Balance: The starter culture helps maintain a balanced and healthy population of beneficial bacteria during fermentation. This can help inhibit the growth of harmful bacteria that might be present in the milk. Controlled Process: Using a starter culture gives you better control over the fermentation process. The bacteria in the curd have already been selected for their ability to produce yogurt, so you're more likely to get a successful and predictable outcome. Quality Assurance: Commercially produced yogurt often contains specific strains of bacteria that have been carefully selected for their desirable properties, including taste, texture, and health benefits. By using a teaspoon of commercial yogurt as a starter, you can ensure that your homemade yogurt will have similar qualities. In essence, adding a teaspoon of curd to milk at the beginning of the yogurt-making process is a way to introduce the necessary bacteria to initiate the fermentation process and ensure a successful and consistent batch of yogurt.

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