Your gut is teeming with bacteria -- but it's not all bad. Probiotics are a source of good bacteria, and including them in your diet can help improve the ratio of good to bad bacteria. For men, these friendly bacteria may help alleviate gastrointestinal problems such as diarrhea or irritable bowel syndrome. Consult your doctor to help you determine if you need to add the friendly bacteria to your diet.
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According to the Academy of Nutrition and Dietetics, the best source of probiotics for men is fermented dairy foods such as yogurt, kefir or aged cheese. But be sure to read the label to make sure the foods you buy contain the live active cultures such as bifidobacteria and lactobacilli. Kimchi, which is a spicy Korean cabbage dish, and sauerkraut are also good food sources of the friendly bacteria.
If you're considering a supplement instead of food, consult your doctor to discuss brands and the strands of bacteria found in the supplements. The supplement industry isn't well-regulated, according to the Cleveland Clinic, and there's no guarantee that the strain of bacteria in the supplement is as effective as claimed.