This is a completely safe consequence. But there's a catch: according to a new study, taking probiotic pills might result in some unpleasant side effects. Yes, they, like antibiotics, can produce a change in the odor of your urine. The research, published in the journal Microbiology Research Journal, found that certain strains of bacteria present in many probiotic products can cause these smells to be released when they break down food molecules in the digestive system. Some people may even notice this effect right after taking a probiotic pill, but it should disappear within a few hours. Since these bacteria are good for our health, there's no need to worry about them producing toxic substances or causing other problems. However, if you have any kind of medical condition or take any medications, ask your doctor first before taking any probiotic supplements.