Eat foods that have fiber naturally. Yes a fiber supplement can be beneficial, but getting fiber straight from the source is better. Foods like fruits, beans, and vegetables. Some foods with fiber such as raspberries and broccoli also help stimulate the growth of good bacteria in the gut.
Stay hydrated! Drinking water is essential for life, but is also necessary to keep you regular with healthy bowel movements.
Foods like yogurt and Kimchi are fermented and have a good bacteria in them called lactobacilli. This bacteria helps reduce inflammation in the gut as well as reduce the risk for certain diseases.
If you are lacking in some of these areas, trying a probiotic supplement is always an option. Before starting a probiotic, talk to you doctor about which supplement would be best for you.