I rarely passed gas before adding fiber. over the last 4 months i started taking fiber supplements tried two different brands because i found one cheaper but with more and i'm still gassy. every day i pass gas, multiple times. is this normal?

Excessive gas can be a common side effect of increasing fiber intake. This is because fiber cannot be broken down by the body, so it passes through the digestive system largely intact, where it is then fermented by bacteria in the large intestine, leading to gas production. However, if the gas is causing discomfort or interfering with daily activities, you should discuss this with your doctor.