Constipation is not only about skipping a day. It can mean hard stools, straining, feeling blocked, or leaving the bathroom without feeling fully empty. Normal bowel habits differ, but a change from your usual pattern can make the day uncomfortable1,6.
Certain probiotic strains may support bowel regularity, especially strains from the Bifidobacterium animalis subsp. lactis family. BB-12® has direct research behind it, while LGG® may be more useful for broader digestive balance than constipation itself.
Probiotics can help, but they work best alongside fiber, fluids, movement, and a steady routine.
What constipation actually means
Some people go more than once a day. Others naturally go only a few times a week. Frequency matters, but it is not the only sign.
You may be constipated if you regularly notice:
• Hard, dry, or lumpy stools
• Straining or discomfort
• Fewer bowel movements than usual
• A feeling that you have not fully emptied
• Bloating or abdominal heaviness
Common triggers include low fiber intake, not drinking enough, ignoring the urge to go, stress, travel, less movement, and routine changes. Iron, calcium, some antacids, and certain pain medicines may also contribute1.
How probiotics may support regularity
Probiotics are live microorganisms that provide a health benefit when taken in an adequate amount. They do not enter the gut and fix constipation overnight.
Selected strains may support regularity by influencing fermentation, stool consistency, intestinal movement, and compounds produced by gut microbes.
A review of adult trials found that probiotics may modestly improve stool frequency and whole gut transit time, although the results varied between products. Bifidobacterium lactis strains showed some of the more consistent findings2.
The full strain name matters. A large CFU number means little if the exact strain has not been studied for the result you want.
Why BB-12® stands out
BB-12® is short for Bifidobacterium animalis subsp. lactis BB-12®. It is one of the best studied probiotic strains for people with low bowel movement frequency.
In a large trial of over a thousand adults with constipation that only two to four bowel movement days per week took BB-12®. The results? Significantly higher frequency to the toilet3!
BB-12® is not a laxative. It may support a more regular pattern when used consistently, but results still depend on diet, health, and the cause of constipation.
Fiber pairs well with probiotics
Probiotics need something to work with. Many beneficial gut microbes ferment certain fibers and produce compounds that support the colon.
Useful fiber sources include:
• Oats and wholegrains
• Beans, lentils, and chickpeas
• Vegetables and leafy greens
• Kiwi, pears, berries, and prunes
• Nuts, seeds, and psyllium
Increase fiber gradually. A sudden jump may cause gas and bloating, especially when the gut is sensitive.
Current constipation guidance supports fiber supplementation as a practical option for many adults, with psyllium having some of the strongest evidence4.
Hydration and movement still matter
Fiber holds water, so regular fluid intake helps it form a softer stool that is easier to pass. Drinking extreme amounts is unnecessary, but being underhydrated can make constipation harder to manage.
Movement also matters. Walking, swimming, cycling, and other moderate activities may encourage intestinal movement. A review of exercise trials found improvements in constipation symptoms, although the quality of the available studies varied5.
Keep it simple:
• Drink regularly across the day
• Take a short walk after meals
• Break up long periods of sitting
• Use the toilet when the urge appears
• Give yourself enough time instead of rushing
A simple routine for better regularity
Start with the basics before adding several products at once.
- Include fiber at each main meal.
- Drink consistently throughout the day.
- Move daily, even if it is only a brisk walk.
- Try using the toilet after breakfast, when the colon is often more active.
- Choose a probiotic that lists the complete strain name.
- Take it consistently for several weeks.
- Track stool form, comfort, and frequency.
Change one or two habits at a time. This makes it easier to see what is helping and avoids turning gut care into an exhausting routine.
Building better bowel regularity
For probiotic strains that support regularity, BB-12® has direct evidence for increasing bowel movement frequency in adults with low defecation frequency.
Think of probiotics as one part of the routine, not the whole routine. Gut balance is usually built through several small habits working together.
References
- HealthHub. “Constipation.” HealthHub, 31 Dec. 2024. Accessed 16 July 2026.
- Dimidi, Eirini, et al. “The Effect of Probiotics on Functional Constipation in Adults: A Systematic Review and Meta Analysis of Randomized Controlled Trials.” The American Journal of Clinical Nutrition, vol. 100, no. 4, 2014, pp. 1075 to 1084. doi:10.3945/ajcn.114.089151.
- Eskesen, Dorte, et al. “Effect of the Probiotic Strain Bifidobacterium animalis Subsp. lactis, BB 12, on Defecation Frequency in Healthy Subjects with Low Defecation Frequency and Abdominal Discomfort: A Randomised, Double Blind, Placebo Controlled, Parallel Group Trial.” British Journal of Nutrition, vol. 114, no. 10, 2015, pp. 1638 to 1646. doi:10.1017/S0007114515003347.
- Chang, Lin, et al. “American Gastroenterological Association American College of Gastroenterology Clinical Practice Guideline: Pharmacological Management of Chronic Idiopathic Constipation.” Gastroenterology, vol. 164, no. 7, 2023, pp. 1086 to 1106. doi:10.1053/j.gastro.2023.03.214.
- Gao, Ruitong, et al. “Exercise Therapy in Patients with Constipation: A Systematic Review and Meta Analysis of Randomized Controlled Trials.” Scandinavian Journal of Gastroenterology, vol. 54, no. 2, 2019, pp. 169 to 177. doi:10.1080/00365521.2019.1568544.
- Mayo Clinic Staff. “Constipation: Symptoms and Causes.” Mayo Clinic, 15 Apr. 2025. Accessed 16 July 2026.
