Garden of Life Probiotic for Constipation: Does It Work?

Quick answer: Can a Garden of Life probiotic for constipation actually help? We did not identify a published clinical trial testing this exact 14-strain, 30 billion CFU formula in people with constipation, so any answer here is inference from the individual strains, not proof about this product. It contains Bifidobacterium lactis (listed as the Bl-04 strain at 6.6 billion CFU on the strain-level label we reviewed), a species that has shown benefits for stool frequency in some constipation research.

That makes it a biologically plausible option for supporting regularity, but the effect is strain-specific and it is not a proven treatment for constipation itself. For the research-backed basics, see our guide to the best probiotic strains for constipation and bloating.

Product version note: This review focuses on the standard 30 billion CFU, 14-strain formula, not the Women’s or Men’s versions. Always check the Supplement Facts panel on the bottle you purchase because formulations and labels can change, and compare the product name because Garden of Life sells multiple products with similar “30 Billion” and “Once Daily” naming. Here is the current Garden of Life Dr. Formulated Probiotics Once Daily listing on Amazon (affiliate link); just confirm the details against the bottle you actually receive.

What Is Garden of Life Once Daily Probiotic?

Garden of Life Once Daily Probiotic is part of the brand’s Dr. Formulated line, a formula originally developed with neurologist David Perlmutter, M.D. Garden of Life became part of Nestlé Health Science when Nestlé acquired its parent company, Atrium Innovations, in 2018.^[13] It is sold as a single vegetarian capsule taken once a day, and the company markets it for general digestive balance, regularity, and immune support rather than as a constipation treatment specifically.^{[8, 9]}

Garden of Life’s current U.S. product page lists the 30 billion CFU Once Daily formula as the refrigerated “Cooler” version. The U.S. Supplement Facts and directions say to store it in a dry place at 71°F (22°C) or below and note that it is best if refrigerated.^{[8, 10]} Because probiotic formulations and packaging can change, check the storage instructions printed on the exact bottle you purchase and follow those instructions.

Full Strain and CFU Breakdown

The strain-level amounts below match the Canadian label for this product as reproduced on Canadian retailer listings.^[11] The U.S. Supplement Facts panel we reviewed lists the same species with group totals (about 20 billion CFU Lactobacillus and 10 billion CFU Bifidobacterium) rather than an amount for each strain,^[10] and those group totals do not exactly match the sums of the strain figures below.

Formulations and label formats differ by market and change over time, so treat this table as a reference point and check the Supplement Facts panel on the bottle you actually receive rather than treating it as definitive for all time:

Note: Individual strain amounts are rounded, so the listed amounts may not add up to exactly 30 billion CFU.

One of the more relevant species in the constipation research is Bifidobacterium lactis. The strain-level label we reviewed lists it as the Bl-04 strain at 6.6 billion CFU, the second highest amount in the formula after L. acidophilus, although the U.S. label does not itemize individual strain amounts. If you want a deeper look at which strains have the strongest track record, see our breakdown of research backed probiotic strains for constipation and bloating.

Garden of Life Probiotic for Constipation: What the Research Actually Says

We did not identify a published clinical trial testing this exact 14-strain Garden of Life formula in people with constipation. That is true of almost every multi-strain commercial probiotic, so it is worth judging the product by what is known about its individual strains and about multi-strain blends in general, rather than by marketing claims.

An earlier 2014 systematic review of 14 randomized controlled trials found that probiotics overall reduced whole gut transit time and increased stool frequency by about 1.3 bowel movements per week, and its species-level analysis found a significant benefit specifically for Bifidobacterium lactis, but not for Lactobacillus casei Shirota.^[1] A follow-up 2020 meta-analysis of 15 randomized controlled trials reached a similar overall conclusion on transit time and stool frequency.

In its subgroup analyses, multispecies probiotics (at least two bacteria) significantly increased stool frequency and reduced bloating, while B. lactis on its own and B. longum on its own did not reach statistical significance for stool frequency, and single-species probiotics did not significantly reduce bloating. On that basis, the authors concluded that multispecies probiotics appeared more beneficial than single-species products.^[5] A 2022 systematic review and meta-analysis of randomized controlled trials focused specifically on chronic constipation in adults.

It found that probiotics increased stool frequency overall, and its species-level analysis found a significant effect for Bifidobacterium lactis. However, the subgroup analysis for probiotic mixtures did not show a statistically significant effect for stool frequency. The authors also cautioned that the findings should be interpreted carefully because of substantial heterogeneity and risk of bias across the included studies.^[6]

More recent work has generally reached the same broad conclusion: probiotics may improve stool frequency in adults with constipation, but the evidence is heterogeneous and its certainty varies. A 2024 BMJ Open meta-analysis of 17 randomized controlled trials involving 1,256 adults with functional constipation found that probiotics-containing products (probiotics and synbiotics) increased stool frequency by about 0.93 bowel movements per week compared with placebo (95% CI 0.47 to 1.40) and also improved stool consistency and constipation symptom scores, but the authors graded the certainty of the evidence as low for stool frequency and very low for stool consistency.^[7]

These reviews do not point in a perfectly straight line: the 2014 review highlighted a benefit for B. lactis specifically, the 2020 review favored multispecies blends and did not find B. lactis alone significant for stool frequency, the 2022 review again singled out B. lactis while finding broad mixtures inconclusive on that outcome, and the 2024 review found a modest overall benefit backed by low-certainty evidence.

That is a reasonably faithful summary of where the actual evidence sits: it varies by which trials are pooled, which outcome is measured, and which strain or strain combination is tested, rather than pointing to one clean answer.

That nuance matters here: the Canadian strain-level label we reviewed lists B. lactis Bl-04 at 6.6 billion CFU, although the U.S. label does not provide individual strain amounts. B. lactis is a species with some evidence for improving stool frequency in constipation studies.

The 2022 review also cautioned that probiotic effects can vary substantially across the individual strains, doses, and study designs included in the evidence base. So evidence for the species as a group should not be treated as proof that the specific Bl-04 strain, at the dose used in this product, will relieve constipation.

We did not find a published constipation trial testing Bl-04 on its own or the finished Garden of Life formula. Bl-04 has, however, been used as one of five strains (at 2.5 billion CFU, alongside L. acidophilus NCFM, L. paracasei Lpc-37, and the B. lactis strains Bi-07 and HN019) in a two-week trial of 156 adults with constipation and bloating. That trial did not show a benefit on its primary outcome (bloating) or on secondary outcomes such as colonic transit time and bowel movement frequency.^[4]

It used a different blend, dose, and duration from this product, so it neither proves nor rules out an effect of Garden of Life Once Daily, but it is a reminder that species-level findings do not automatically carry over to a particular strain in a particular blend.

An earlier, widely cited systematic review and meta-analysis focused on irritable bowel syndrome and chronic idiopathic constipation reached a more cautious conclusion for the constipation side specifically. It found only two eligible randomized controlled trials in chronic idiopathic constipation, and while those two trials did show a benefit for probiotics on stool frequency, the reviewers described the evidence base as too limited to draw firm conclusions about how well probiotics actually work for constipation.^[2]

Separately, a small but well-designed randomized, double-blind, placebo-controlled trial of Lactobacillus reuteri DSM 17938, taken on its own by 40 adults with chronic functional constipation, found a significant increase in weekly bowel movements after four weeks compared with placebo, though it did not meaningfully change stool consistency.^[3]

Garden of Life Once Daily does not use that specific reuteri strain, so this trial does not apply directly, but it illustrates the general pattern seen across this research: individual, well-studied strains may improve stool frequency, while evidence for broad multi-strain blends remains less consistent, and the total number of good-quality trials in constipation specifically is still fairly small.

Put simply, the honest answer to “does Garden of Life Once Daily help constipation” is: it contains a species with some genuine evidence behind it for stool frequency, which gives it a plausible rationale for supporting regularity. The evidence does not establish that this specific product treats constipation, we did not identify a published trial of the finished blend, and results in the underlying research vary enough from strain to strain that it will not work for everyone.

A Note on Customer Reviews

Customer reviews are anecdotal and should not be treated as clinical evidence. Reviews for probiotic products commonly include reports of improved digestion or regularity as well as reports of gas, bloating, or no noticeable benefit, but individual experiences cannot establish whether the product works for constipation.

Pros and Cons

How to Take It

The label directs adults to take one capsule daily, with or without food. A few practical points worth knowing:

• Give it time. Trials of probiotics for constipation have used treatment periods ranging from two weeks^[4] to four weeks or longer,^[3] so a few days is unlikely to be a fair test.
• Space it out from antibiotics. The Canadian product label copy advises taking it at least 2 to 3 hours before or after antibiotics.^[12] Follow the instructions on your own bottle.
• Track your stools. Using something like the Bristol Stool Chart to note stool form before and during use makes it much easier to tell honestly whether it is actually helping.
• Pair it with fiber and fluids. Probiotics are not a substitute for adequate fiber and water intake. If you have already tried increasing fiber without much success, our article on why fiber isn’t working for your constipation covers common reasons that happens.

Side Effects and Who Should Be Cautious

Canadian label copy for the standard Once Daily formula notes that digestive upset can occur and advises discontinuing use and consulting a healthcare practitioner if symptoms worsen or persist beyond three days. It also advises consulting a healthcare practitioner before use if you have nausea, fever, vomiting, bloody diarrhea, or severe abdominal pain, or if you are pregnant or breastfeeding, and states the product should not be used by people with weakened immune systems.^[12]

The U.S. label we reviewed carries a shorter general caution to consult a healthcare practitioner if you are pregnant, nursing, anticipate surgery, or take medication regularly.^[10]

Whichever label is on your bottle, follow it: if you are pregnant, breastfeeding, immunocompromised, preparing for surgery, or managing a significant underlying medical condition, check with a healthcare professional before starting any probiotic, since wording can differ between the standard, Women’s, and Men’s formulas and between markets.

If your constipation is severe, has lasted more than a few weeks, or comes with symptoms like unexplained weight loss, blood in the stool, or persistent abdominal pain, that calls for a medical evaluation rather than a probiotic trial.

How It Compares to Other Options

If you are comparing Garden of Life Once Daily with other probiotic products, the most useful differences to look at are the specific strains, doses, the evidence behind those strains, storage requirements, and price, rather than brand reputation alone. If you are comparing it against other named brands, our Physician’s Choice Probiotic review looks at a similarly positioned competitor, and our roundup of the 9 best probiotic supplements puts several options side by side.

For a broader view of probiotics as a category for constipation and bloating specifically, see our evidence-based guide to the best probiotics for constipation and bloating. If probiotics alone have not been enough for you, our guide to magnesium supplements for constipation covers another commonly used option and the evidence behind it.

The Bottom Line

Garden of Life Once Daily Probiotic is a clearly labeled probiotic that includes Bifidobacterium lactis, a species with some genuine, if strain-dependent, evidence for improving stool frequency. That makes it a plausible option for someone interested in trying a probiotic for regularity, but the evidence does not establish that this specific product treats constipation.

It is not a clinically proven constipation treatment, and individual responses can vary; we also did not identify a published trial of the 14-strain blend itself. Consider it alongside adequate fiber and fluid intake, keep your expectations modest, and treat it as a personal-preference option rather than a substitute for medical evaluation if your constipation is severe or persistent.

Frequently Asked Questions

Does Garden of Life Once Daily Probiotic help with constipation?

It may help some people with regularity, but there is no clinical trial establishing that the finished Garden of Life Once Daily formula treats constipation. The product contains Bifidobacterium lactis, a species associated with increased stool frequency in some constipation research, but results vary between strains and studies.

How long does it take to work?

There is no established time at which Garden of Life Once Daily should start working for constipation because the finished product has not been directly tested for that purpose. Clinical trials of probiotics for constipation have used treatment periods ranging from about two weeks to four weeks or longer, so judging the effect after only a few days may be premature.

Can Garden of Life Once Daily Probiotic cause constipation or bloating instead of relieving it?

Some people may experience gas, bloating, or other digestive changes after starting a probiotic. If symptoms are persistent, severe, or worsening, stop the product and discuss the symptoms with a healthcare professional.

Is Garden of Life Once Daily the same as the Women’s or Men’s version?

No. Garden of Life sells separate Once Daily formulas, including Women’s and Men’s products. Their strain combinations and CFU amounts can differ, so they should not be treated as interchangeable. Always check the Supplement Facts panel for the exact version you are buying.

Should I take a probiotic instead of a fiber supplement for constipation?

Not necessarily. Probiotics and dietary fiber work differently and are not direct substitutes. A probiotic should generally be viewed as an optional addition rather than a replacement for adequate dietary fiber, fluids, and other evidence-based approaches to constipation management.

This article is for general informational purposes and is not a substitute for professional medical advice. Always read the current product label before use and consult a doctor or pharmacist if you are pregnant, nursing, taking prescription medication, or have a chronic digestive condition.

References

1. 1. Dimidi E, Christodoulides S, Fragkos KC, Scott SM, Whelan K. The effect of probiotics on functional constipation in adults: a systematic review and meta-analysis of randomized controlled trials. Am J Clin Nutr. 2014;100(4):1075-1084. doi: 10.3945/ajcn.114.089151. PMID: 25099542. pubmed.ncbi.nlm.nih.gov/25099542
   2. Ford AC, Quigley EMM, Lacy BE, Lembo AJ, Saito YA, Schiller LR, Soffer EE, Spiegel BMR, Moayyedi P. Efficacy of prebiotics, probiotics, and synbiotics in irritable bowel syndrome and chronic idiopathic constipation: systematic review and meta-analysis. Am J Gastroenterol. 2014;109(10):1547-1561. PMID: 25070051. pubmed.ncbi.nlm.nih.gov/25070051
   3. Ojetti V, Ianiro G, Tortora A, D’Angelo G, Di Rienzo TA, Bibbò S, Migneco A, Gasbarrini A. The effect of Lactobacillus reuteri supplementation in adults with chronic functional constipation: a randomized, double-blind, placebo-controlled trial. J Gastrointestin Liver Dis. 2014;23(4):387-391. PMID: 25531996. pubmed.ncbi.nlm.nih.gov/25531996
   4. Airaksinen K, Yeung N, Lyra A, Lahtinen SJ, Huttunen T, Shanahan F, Ouwehand AC. The effect of a probiotic blend on gastrointestinal symptoms in constipated patients: a double blind, randomised, placebo controlled 2-week trial. Benef Microbes. 2019;10(6):617-627. doi: 10.3920/BM2018.0163. PMID: 31131616. pubmed.ncbi.nlm.nih.gov/31131616
   5. Zhang C, Jiang J, Tian F, Zhao J, Zhang H, Zhai Q, Chen W. Meta-analysis of randomized controlled trials of the effects of probiotics on functional constipation in adults. Clin Nutr. 2020;39(10):2960-2969. PMID: 32005532. pubmed.ncbi.nlm.nih.gov/32005532
   6. van der Schoot A, Helander C, Whelan K, Dimidi E. Probiotics and synbiotics in chronic constipation in adults: a systematic review and meta-analysis of randomized controlled trials. Clin Nutr. 2022;41(12):2759-2777. PMID: 36372047. pubmed.ncbi.nlm.nih.gov/36372047
   7. Ding F, Hu M, Ding Y, Meng Y, Zhao Y. Efficacy in bowel movement and change of gut microbiota on adult functional constipation patients treated with probiotics-containing products: a systematic review and meta-analysis. BMJ Open. 2024;14(1):e074557. doi: 10.1136/bmjopen-2023-074557. PMID: 38238054. pubmed.ncbi.nlm.nih.gov/38238054
   8. Garden of Life. Dr. Formulated Probiotics Once Daily Cooler 30 Capsules, official product page. gardenoflife.com
   9. Garden of Life. Dr. Formulated Probiotics Once Daily, product listing. View on Amazon
   10. Vitacost. Garden of Life Dr. Formulated Probiotics Once Daily, 30 Vegetarian Capsules (U.S. Supplement Facts, storage and warnings). vitacost.com
   11. Healthtree. Garden of Life Dr. Formulated Probiotics Once Daily 30 Billion (Canadian label with strain-level CFU amounts). healthtree.ca
   12. AvivaHealth. Garden of Life Dr. Formulated Probiotics Once Daily (Canadian label directions and warnings). avivahealth.com
   13. Nestlé Health Science / Atrium Innovations. Corporate ownership of the Garden of Life brand, disclosed in company acquisition reporting. foodbusinessnews.net