Probiotics are often believed to be beneficial for gut health, but there is currently lack of evidence to show concrete benefits of supplementing with probiotics for treating infections or for prevention. Additionally, commercial products may not necessarily match the individual's unique gut flora. It is not recommended to rely heavily on probiotic supplements as they may not bring significant results. It is worth noting that probiotics can also cause diarrhea in some individuals. It is best to approach probiotic supplementation with caution and not expect miracles.