If you don’t have fermented yogurt, please buy yeast from the market. Answer of the how can I have a yeast without buying one is easy. You can get a spoon of yogurt (should be home-made)and rest. It is the best way to acquire a yeast since it is the purest and hygienic state of the yogurt. The lifetime of yogurt yeast is 7 days. If you want to keep it you should make another yogurt in 7 days.
Here is the probiotic yogurt recipe;
How to Make Probiotic Yogurt;
The raw milk should be boiled and after boiling, it should be cooled to 45 °C and add the yogurt yeast and stir the milk. With the closing the opening with a tissue or cloth, it should be waited for 4-5 hours long. After waiting, put the probiotic yogurt into the refrigerator and it is ready to eat.
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