The recommended amount of kefir to drink daily is generally around 1 to 3 cups (237 to 710 mL). Most sources suggest starting with a small amount, such as 1 tablespoon, and gradually increasing the intake over time to allow your gut to adjust. For sustained probiotic benefits, about 1 cup (around 250 mL) per day is typically sufficient for most people. Some experts recommend not exceeding 2 to 3 cups a day to avoid digestive discomfort like bloating or gas. It is important to listen to your body and adjust the amount based on how you tolerate it, especially if you are new to kefir or have a sensitive stomach. People with certain health conditions, such as diabetes or weakened immune systems, may need to be more cautious and consult healthcare professionals before increasing intake. In summary, drinking about 1 cup per day, starting low and gradually ramping up, is ideal for most adults to gain kefir's probiotic benefits safely and comfortably.