After 12 Years of Chronic Constipation a Probiotic Brought Relief What Research Says

Chronic constipation is one of the most common gastrointestinal disorders worldwide. It is generally defined as having fewer than three bowel movements per week, often accompanied by straining, hard stools, and a persistent sensation of incomplete evacuation. According to estimates from the World Gastroenterology Organisation (WGO), chronic constipation affects a significant portion of the global population, with various epidemiological studies suggesting that roughly 9% to 20% of people worldwide experience it at some point in their lives.

For many people, managing chronic constipation becomes a long and frustrating process. Even with dietary changes, regular exercise, and doctor-recommended medications, some patients continue to struggle with irregular bowel movements.

Recently, a story shared on a health-focused Reddit community drew attention to the possible role of probiotics in digestive health. In the post, a woman described how eating probiotic yogurt, and later taking a supplement containing Bifidobacterium lactis, appeared to resolve a constipation problem she had been dealing with for more than a decade.

A 12-Year Struggle With Chronic Constipation

In the Reddit post, the user explained that she had suffered from severe constipation for about 12 years. According to her account, the problem began after a major medical emergency that required multiple surgeries. During her recovery, she underwent months of treatment with strong antibiotics and morphine, medications that can sometimes affect gut function. After the emergency treatment ended, her digestive system never returned to normal.

She wrote that she rarely felt the natural urge to have a bowel movement and often had to rely on laxatives recommended by her doctors. Those treatments, however, didn’t solve the underlying problem. Instead, she described a frustrating pattern: several days of constipation followed by diarrhea after taking laxatives.

Some of the products she used included polyethylene glycol (commonly sold as Miralax) and magnesium-based laxatives. While these treatments gave temporary relief, they never restored normal bowel function, and like many people in her situation, she eventually looked into more comprehensive, science-backed approaches to chronic constipation treatment beyond laxatives alone.

A Healthy Diet and Active Lifestyle Didn’t Help

One of the most discouraging parts of her experience was that the constipation continued despite maintaining a genuinely healthy lifestyle. Her diet regularly included fruits and vegetables, lentils and legumes, whole grains, and fresh salads. She also stayed physically active, walking her dog for around two hours every day and practicing yoga and Pilates several times a week.

Over the years, she tried numerous remedies, including herbal supplements such as Triphala, an Ayurvedic mixture sometimes used to support digestion. It seemed to help at first, but the effect eventually faded, and the constipation persisted.

An Unexpected Discovery During a Vacation

The situation changed unexpectedly during a vacation in Washington State. While visiting the small town of Bow, she bought plain, unsweetened yogurt from a local cheese shop and ate it before bed. The next morning, she felt something she had rarely experienced in years: a strong, natural urge to have a bowel movement. She described it as completely normal, soft and easy, with no laxatives involved.

Since the yogurt was the only new food she’d eaten, she suspected it was behind the change. She was so surprised that she later drove three hours back to the shop just to buy more of it. After eating it daily, her bowel movements became regular again.

Discovering the Role of Bifidobacterium Lactis

Curious about why the yogurt seemed to work, she began researching the bacteria found in fermented foods. That led her to Bifidobacterium lactis, a probiotic bacterium widely used in fermented dairy products and dietary supplements, and specifically to a strain known as Bifidobacterium lactis HN019, which has been studied for its possible ability to improve intestinal transit time.

Since the yogurt wasn’t available in her home state of California, she eventually switched to a probiotic supplement containing similar strains. According to her post, the supplement kept her bowel movements regular, and she now has a bowel movement every morning, an improvement that has lasted more than a year.

What Scientific Research Says About Bifidobacterium Lactis HN019

Scientists continue to study whether specific probiotic strains can improve digestive health, particularly in people with functional constipation, a condition marked by infrequent bowel movements or difficulty passing stool without an identifiable medical cause. Research on Bifidobacterium lactis HN019 has produced mixed results: some studies show limited effects on bowel movement frequency, while others suggest benefits when the probiotic is combined with additional ingredients.

A large clinical trial found no significant improvement. One of the largest studies on this strain, a randomized, triple-blind, placebo-controlled trial conducted in Shanghai, China, and published in JAMA Network Open, involved 229 adults aged 18 to 70 who met the Rome III diagnostic criteria for functional constipation. Participants received either a probiotic supplement containing Bifidobacterium lactis HN019 or a placebo over eight weeks. Researchers tracked complete spontaneous bowel movements (CSBMs), meaning bowel movements that occur naturally without laxatives or other medication.

Both groups showed some improvement by the end of the trial, but the difference between them was not statistically significant. The researchers concluded that supplementation with this strain, at the dose tested, did not significantly increase bowel movement frequency compared with placebo.

A probiotic yogurt study reported faster intestinal transit. Another study, examining probiotic yogurt, reported more encouraging results when probiotics were combined with other gut-supporting ingredients. Participants with constipation consumed a yogurt daily for two weeks containing Bifidobacterium lactis HN019, Lactobacillus acidophilus NCFM, and polydextrose, a prebiotic fiber that supports beneficial gut bacteria.

Using the Agachan Constipation Score, a clinical tool for measuring symptoms such as stool frequency and abdominal discomfort, along with colonic transit time measurements, researchers found that the yogurt group had significantly faster intestinal transit than the control group, generally a sign of improved bowel function.

They suggested that combining probiotic bacteria with prebiotic fiber may play an important role in improving gut motility.

Mixed evidence overall. Together, these findings show how complex probiotic research can be. Single-strain supplementation with Bifidobacterium lactis HN019 didn’t significantly improve bowel movement frequency in the large clinical trial, but multi-component probiotic foods combining probiotics and prebiotic fibers may offer more noticeable benefits. Scientists say larger studies are still needed to understand how different strains, dosages, and prebiotic combinations affect bowel function.

Why Probiotic Results May Vary

Experts point to several reasons why probiotic studies produce different outcomes. Effects tend to be strain-specific, meaning benefits depend on the exact bacteria used. Combining probiotics with prebiotic fibers can enhance the growth and activity of beneficial gut bacteria. The delivery method matters too: fermented foods like yogurt can help protect bacteria as they pass through the digestive system. And because everyone’s gut microbiome is unique, a treatment that works well for one person may not work the same way for someone else.

Some commercially available probiotic and synbiotic supplements also contain beneficial strains such as Bifidobacterium lactis, which are often studied for digestive health and bowel function. Readers who want to explore similar formulations, including a full rundown in our roundup of the 9 best probiotic supplements of 2026, can check out this probiotic option and this synbiotic formula, which combines probiotics with prebiotic fibers to support gut microbiota balance.

Growing Interest in the Gut Microbiome

In recent years, researchers have found that the gut microbiome plays a role in many aspects of human health, influencing not just digestion but also metabolism, immune function, and even aspects of mental health. While a Reddit story can’t be considered scientific proof, personal experiences like this one sometimes point to areas worth exploring further.

For people struggling with long-term constipation, ongoing research on strains like Bifidobacterium lactis HN019 may eventually help doctors understand who is most likely to benefit from these treatments.

Disclosure: The information on this website is for educational and informational purposes only and is not a substitute for professional medical advice. Some links on this site are affiliate links through which we may earn a commission.

References

1. https://pubmed.ncbi.nlm.nih.gov/28244670/
2. https://pubmed.ncbi.nlm.nih.gov/25974005/
3. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6390063/
4. https://www.frontiersin.org/articles/10.3389/fmicb.2019.00428/full