Probiotics for Anxiety: What 72 Clinical Trials Actually Show (2026 Review)

A friend of mine started taking probiotics last year because she’d read they could help with anxiety. She wasn’t in crisis or anything — just that low-grade, always-humming tension that makes your jaw tight and your sleep shallow. Two weeks in, she felt noticeably calmer. “It’s like someone turned the volume down,” she told me.

So I went looking for the science behind her experience. And honestly? What I found was more complicated — and more interesting — than I expected.

Here’s the short version: In 2011, researchers fed a single strain of bacteria — Lactobacillus rhamnosus JB-1 — to anxious mice. The results were dramatic. Calmer behavior, lower stress hormones, visible changes in brain chemistry. The study, published in PNAS, basically launched an entire field of research.

Six years later, a different team gave the exact same strain to humans in a rigorous double-blind trial. The result? Nothing. No reduction in anxiety. No change in depression. No effect on stress hormones. They literally titled the paper “Lost in Translation.”

That gap between mouse promise and human reality? It pretty much defines this whole field. There is real evidence here — a 2025 meta-analysis of 72 randomized controlled trials found that probiotics significantly reduce anxiety symptoms. But the details matter enormously: which strains, what dose, in whom, and for how long.

Most articles on this topic either oversell everything or dismiss the field entirely. Neither is accurate. So we dug into every major clinical trial and meta-analysis published through early 2026. Here’s what we actually found.

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What Are Psychobiotics, Anyway?

The term “psychobiotics” was coined back in 2013 by researchers Ted Dinan and John Cryan. Their original definition: live organisms that, when you eat enough of them, produce a health benefit in people suffering from psychiatric illness (Dinan et al., 2013, Biological Psychiatry). It’s a cool word. It’s also gotten a lot broader since then.

These days, the term covers:

• Probiotic strains with showed effects on brain function or mental health
• Prebiotic fibers that feed the beneficial gut bacteria linked to mood regulation
• Fermented foods that deliver live microorganisms to your gut

The psychobiotics market is projected to hit $187–213 million by 2032, growing roughly 3.5% per year. The science is real — but let’s be honest, the marketing has sprinted way ahead of the evidence.

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How Your Gut Bacteria Actually Talk to Your Brain

Here’s something that still blows my mind: your gut contains roughly 100 million neurons. That’s more than your spinal cord. And they’re connected directly to your brain through the vagus nerve. There are four main ways gut microbes influence anxiety, and they’re all pretty well established at this point.

1. The Vagus Nerve Highway

Think of the vagus nerve as a direct phone line between your gut and your brain. Bacterial metabolites — short-chain fatty acids, neurotransmitter precursors — activate nerve endings in the gut wall that signal straight to the brainstem.

How important is this pathway? In animal studies, cutting the vagus nerve completely wiped out the mental health benefits of probiotics. No vagus nerve, no effect. That’s the strongest evidence we’ve got that gut-brain signaling is real and mechanistically specific — not just some loose correlation.

2. Your Stress Hormone System (HPA Axis)

Your hypothalamic-pituitary-adrenal (HPA) axis controls cortisol — the hormone that spikes when you’re stressed and stays elevated when anxiety becomes chronic. Certain gut bacteria modulate GABA signaling, which directly influences how reactive that whole system is.

In plain English: specific probiotic strains can actually dial down your cortisol stress response. This has been confirmed in multiple human trials, particularly with the B. longum R0175 + L. helveticus R0052 combination.

3. Neurotransmitter Production

You’ve probably heard this stat before, but it’s still wild: approximately 95% of your body’s serotonin is produced in your gut, not your brain. Gut bacteria also synthesize GABA (the calming neurotransmitter that benzodiazepines target), dopamine, and tryptophan metabolites.

Now, these gut-produced neurotransmitters don’t cross the blood-brain barrier directly. Instead, they act on local nerve endings, immune cells, and specialized cells that relay signals upward through the vagus nerve and bloodstream. It’s more of an indirect conversation than a direct delivery — but it’s a real one.

4. Inflammation Reduction

This one’s getting a lot of attention lately. Chronic low-grade inflammation — measured by markers like CRP and IL-6 — is increasingly recognized as both a cause and consequence of anxiety disorders. When your gut barrier gets leaky, bacterial fragments sneak into the bloodstream, triggering systemic inflammation that messes with brain function.

Probiotics improve gut barrier integrity and tamp down pro-inflammatory cytokines. A 2024 review (Ribera et al., Neuroscience & Biobehavioral Reviews) actually identified this immune-inflammatory pathway as the most likely explanation for why probiotics help with mental health at all.

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The Evidence: What 3 Major Meta-Analyses Found

Alright, let’s get into the numbers. Three large meta-analyses published in 2025 give us the clearest picture yet of whether this stuff actually works. Fair warning: the answer is “yes, but” — and that “but” is where things get interesting.

Meta-Analysis 1: The Big One (72 Trials)

Zhang et al. (2025), BMC Psychiatry — This is the largest meta-analysis to date.

• 72 RCTs (50 probiotic, 11 prebiotic, 5 synbiotic)
• 6,097 total participants (3,319 intervention, 2,778 control)
• 49 studies measured anxiety (n = 3,912)

| Outcome | Effect Size (SMD) | 95% CI | Significant? |

|—|—|—|—|

| Anxiety | -0.44 | -0.59 to -0.28 | Yes (p < 0.001) |

| Depression | -0.53 | -0.67 to -0.39 | Yes (p < 0.001) |

| Sleep quality | -0.39 | -0.53 to -0.25 | Yes (p < 0.001) |

Here’s the key subgroup finding: multi-strain formulations (3+ strains) significantly outperformed single-strain products. And Lactobacillus alone? Ineffective for anxiety. We’ll come back to that — it’s important.

Meta-Analysis 2: People With Actual Diagnoses

Asad et al. (2025), Nutrition Reviews — This one only looked at people with real psychiatric diagnoses. That distinction matters a lot.

• 23 RCTs, 1,401 patients with diagnosed depression or anxiety

| Intervention | Effect Size (SMD) | Significant? |

|—|—|—|

| Probiotics for depression | -0.96 | Yes |

| Probiotics for anxiety | -0.59 | Yes |

| Prebiotics for depression | -0.28 | No |

The takeaway that jumped out at me: effects were much larger in clinically diagnosed patients than in healthy volunteers. If you’ve got actual anxiety — not just “I’m stressed about work” but diagnosable, clinical anxiety — probiotics are more likely to help you.

There was also a surprising twist: in this clinically diagnosed group, single-strain probiotics actually performed well, contradicting the Zhang finding. The likely explanation? When you’re treating a diagnosable condition, the specific strain matters more than how many you’re taking.

Meta-Analysis 3: The Reality Check

Zandifar et al. (2025), Brain and Behavior — 54 RCTs for anxiety, broader inclusion criteria. And this is where things get more sobering.

• Anxiety effect size: SMD = 0.29 (noticeably smaller than the other two)
• 5 of 18 anxiety measurement tools showed null or contradictory results
• Interventions exceeding 8 weeks yielded nonsignificant results
• Prebiotics alone: no significant effect

This is the one that keeps me honest. When you include all populations (including healthy volunteers who weren’t really anxious to begin with), use varied measurement tools, and look at longer durations, the signal weakens substantially. Probiotics aren’t a universal anxiety solution — they help specific people, under specific conditions.

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Strain-by-Strain: What Actually Works (and What Doesn’t)

This is where things get really practical. Not all probiotics are the same — and I can’t stress this enough. Strain identity matters for probiotics the way active ingredient identity matters for medications. A probiotic isn’t a probiotic isn’t a probiotic.

Tier 1: Strong Clinical Evidence

| Strain | Key Study | Population | Result | Dose | Duration |

|—|—|—|—|—|—|

| B. longum R0175 + L. helveticus R0052 (Cerebiome) | Messaoudi et al., 2011 | 55 healthy adults | Significant reduction in anxiety, depression, anger-hostility (HADS) | 3 billion CFU/day | 30 days |

| B. longum 1714 | Allen et al., 2024, Scientific Reports | 89 adults (crossover) | Improved sleep quality, modulated neural stress response | 1 billion CFU/day | 4 weeks |

| Multi-strain formulations (3+ strains) | Zhang et al., 2025 (meta-analysis) | Pooled across studies | Largest effect size for depression (SMD = -0.82); outperformed single-strain for anxiety | Varies | 4–12 weeks |

The Cerebiome combination (B. longum R0175 + L. helveticus R0052) is the most-studied psychobiotic formulation in humans. You might see it marketed under brand names like Probio’Stick and Cerebiome. The evidence is consistent across multiple trials — this one’s legit.

Tier 2: Promising but We Need More Data

| Strain | Evidence | Notes |

|—|—|—|

| L. plantarum PS128 | Positive in children with neurodevelopmental disorders | Limited adult anxiety data |

| B. breve (various) | Identified in meta-analyses as showing antidepressant effects | Mechanism: HPA axis modulation. Human RCTs are small |

| B. infantis 35624 (Alflorex) | Some evidence for stress and IBS-anxiety overlap | More IBS than pure anxiety data |

| L. helveticus R0052 (alone) | Positive in combination; limited solo human data | A 2025 animal study found sex- and diet-dependent effects |

Tier 3: Overhyped or Flat-Out Failed in Humans

| Strain | The Claim | The Reality |

|—|—|—|

| L. rhamnosus JB-1 | Dramatic anxiolytic effects in mice (Bravo et al., 2011, PNAS) | Complete null in humans. Kelly et al. (2017): n=29, 8-week crossover RCT. No effect on Beck Anxiety Inventory (p=0.95), Beck Depression Inventory (p=0.75), or Perceived Stress Scale (p=0.053). Paper titled “Lost in Translation.” |

| L. rhamnosus GG | World’s most commercially successful probiotic | Didn’t meet inclusion criteria for a 2025 systematic review of mental health claims (Slykerman et al., SAGE). No solid anxiety evidence. |

| L. rhamnosus HN001 | Positive postpartum depression data | PRESS study: no significant reduction in exam stress among students |

| Lactobacillus genus (alone) | “Lactobacillus for anxiety” | Zhang et al. (2025) meta-analysis: Lactobacillus alone was ineffective for anxiety reduction |

The pattern here’s pretty clear: If you’re buying a probiotic for anxiety and it only contains Lactobacillus species, the clinical evidence doesn’t support that choice. The strongest evidence points to Bifidobacterium-containing multi-strain formulations and the specific Cerebiome combination.

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The L. rhamnosus Story (and Why It Matters)

This deserves its own section because it perfectly illustrates the single biggest problem in the probiotic industry. And honestly, it’s a cautionary tale worth sitting with for a minute.

In 2011, the Bravo et al. mouse study on L. rhamnosus JB-1 landed in PNAS and became one of the most-cited papers in the entire gut-brain field. It showed GABA receptor changes in the cortex and amygdala, reduced corticosterone, and clear anxiety-reducing behavior — all abolished when they cut the vagus nerve.

It was a beautiful study. It was also in mice.

When Kelly et al. (2017) tested the identical strain in 29 healthy men over 8 weeks in a rigorous double-blind crossover trial, they found no effect on any psychological measure. None. The effect sizes were essentially zero.

Why did it fail? There are several possible explanations:

• Mouse-to-human translation — The murine gut microbiome and stress response system differ fundamentally from ours
• Dose scaling — The mouse dose may not have been equivalent
• Population — Healthy volunteers may have had no room for improvement (ceiling effect)
• Colonization — The strain may not persist in the human gut long enough to do anything

The lesson here’s one I wish more people understood: never trust a probiotic claim based solely on animal research. Demand human RCTs with the specific strain, in a relevant population, at a defined dose. If a supplement company cites mouse studies to sell you something, treat that as a red flag.

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Prebiotics and Fermented Foods: The Other Options

Prebiotics (GOS, FOS, Inulin)

Prebiotic fibers take a different approach — they feed the beneficial bacteria already living in your gut rather than introducing new strains. It’s a solid idea in theory. The evidence for mental health, though, is weaker than for probiotics:

• Asad et al. (2025): Prebiotics for depression in clinically diagnosed patients — not statistically significant (SMD = -0.28, confidence interval crossed zero)
• Zhang et al. (2025): Included 11 prebiotic studies but the subgroup evidence is thin
• No adequately powered RCTs testing prebiotics alone for anxiety as of early 2026

Bottom line: Prebiotic fibers are great for general gut health. But if you’re specifically trying to address anxiety, they shouldn’t be your first pick. They may work best in combination with probiotic strains (synbiotics).

Fermented Foods

The “psychobiotic diet” concept — combining prebiotic-rich foods with fermented foods — was popularized by researchers at APC Microbiome Ireland and has generated a lot of excitement. Kefir, kimchi, sauerkraut, miso, tempeh, yogurt with live cultures, kombucha — you’ve probably seen these on every “gut health” list on the internet.

But here’s where we need to be careful about what we actually know:

• Ribera et al. (2024, Neuroscience & Biobehavioral Reviews): Reviewed 42 studies but found insufficient evidence to differentiate fermented food outcomes from supplement outcomes
• An observational study in medical students found associations between fermented food consumption and reduced anxiety under stress — but it wasn’t an RCT
• A 2025 review in Probiotics and Antimicrobial Proteins examined fermented vegetables as psychobiotic sources, but the evidence is still preclinical

Bottom line: There are zero adequately powered RCTs directly comparing fermented foods versus probiotic supplements for anxiety. Fermented foods are likely beneficial for big-picture, gut health and may contribute to anxiety reduction, but we can’t quantify the effect or recommend them as a replacement for specific probiotic strains if anxiety reduction is your actual goal.

What I’d suggest: Eat fermented foods for general health — they’re genuinely good for you. But if you specifically want to target anxiety, add a studied probiotic strain (see Tier 1 above) rather than relying on fermented foods alone.

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Dosing, Timeline, and What to Realistically Expect

How Much Should You Take?

Clinical trials typically use 1–10 billion CFU (colony-forming units) per day. Here’s something worth noting: the World Federation of Societies of Biological Psychiatry (WFSBP) now provisionally recommends this range as adjunctive treatment for major depressive disorders. That’s a big deal — it signals mainstream psychiatric acceptance.

And more isn’t necessarily better. Most positive trials use modest doses. Those mega-dose products (50+ billion CFU) that supplement companies love to market? They haven’t been shown to produce larger effects. You’re probably just paying more for bacteria your body can’t use.

How Long Before You’d Notice?

• Earliest effects: 2 weeks of daily use (Nature, 2025)
• Most trials show effects: 4–8 weeks
• Weird finding: Interventions exceeding 8 weeks showed weaker effects in the Zandifar et al. meta-analysis

That last point is counterintuitive, right? There are a few possible explanations: the gut microbiome may adapt and reduce the intervention’s impact; longer trials tend to have higher dropout rates that bias results; or the psychological expectation effect may just fade over time. We don’t know for sure yet.

A practical approach: Commit to a minimum of 4 weeks at a consistent dose before judging whether it’s working. If you’re not feeling any benefit by 8 weeks, that strain or formulation probably isn’t the right one for you.

What Should You Actually Expect?

Let’s be real. The average effect size across these meta-analyses is an SMD of -0.44 to -0.59 for anxiety. In practical terms, that’s a small-to-medium effect — noticeable but not dramatic.

To put that in perspective:

• SSRIs for generalized anxiety disorder: SMD around -0.33 to -0.45
• Cognitive behavioral therapy for anxiety: SMD around -0.73 to -1.0
• Exercise for anxiety: SMD around -0.58

So probiotics are roughly in the same ballpark as SSRIs for anxiety. That’s both encouraging and humbling. They’re not a miracle cure. They’re a legitimate tool — one piece of a bigger picture.

Who Responds Best?

The evidence strongly suggests probiotics work better for:

• People with clinically diagnosed anxiety or depression (larger effect sizes)
• People with baseline gut issues (IBS, dysbiosis, history of antibiotics)
• People using multi-strain formulations (3+ strains including Bifidobacterium)
• People taking them as adjunctive therapy alongside other treatments

Probiotics are least likely to help:

• Healthy people without clinical anxiety trying to “fine-tune”
• People using single-strain Lactobacillus-only products
• People expecting a standalone treatment for severe anxiety

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Who Should NOT Take Probiotics

Almost every consumer probiotic article skips this section entirely. That’s irresponsible, because the contraindications are real and well-documented. So let’s cover them properly.

Absolute Contraindications

• Immunocompromised patients — organ transplant recipients, people on chemotherapy, active AIDS, leukemia, or immunosuppressive therapy. The risk is bacteremia (bacteria entering the bloodstream) and fungemia. This isn’t theoretical — case reports exist.
• Critically ill / ICU patients — compromised gut barriers allow bacterial translocation
• Acute pancreatitis — the PROPATRIA trial found increased mortality in acute pancreatitis patients given probiotics. That’s the strongest safety signal in the entire literature. It’s worth pausing on.
• Structural cardiac abnormalities — patients with valvular disease or central venous catheters face real infection risk
• Damaged GI mucosa / short bowel syndrome — compromised gut barriers increase translocation risk

Use With Caution

• SIBO (small intestinal bacterial overgrowth) — probiotics may actually worsen symptoms by adding more bacteria to an already overpopulated small intestine
• Premature neonates — despite some NEC prevention evidence, contamination risk is significant
• Elderly with multiple comorbidities — weakened immune function increases risk

For the Healthy Majority

If you’re a generally healthy adult, probiotics are very safe. Adverse events in clinical trials are comparable to placebo. The most common side effects — mild bloating, gas, slight GI discomfort — typically resolve within the first few days as your gut microbiome adjusts. Nothing scary for most of us.

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Probiotics and Anxiety Medications: What You Should Know

If you’re already taking medication for anxiety, you’re probably wondering whether probiotics play nice with your prescriptions. This is another area that consumer content tends to ignore. Here’s what the evidence says.

Antibiotics

Antibiotics reduce probiotic efficacy by killing the supplemented bacteria. If you’re on antibiotics, separate your probiotic dose by at least 2 hours. Some practitioners recommend waiting until the antibiotic course finishes before starting; others suggest concurrent use to maintain gut diversity. The evidence doesn’t clearly favor either approach — do what feels right for your situation and talk to your doctor.

SSRIs and Other Psychiatric Medications

Here’s some genuinely encouraging news: one synbiotic study showed improved depressive symptoms in patients co-treated with fluoxetine (Prozac) over 6 weeks. Probiotics appear to complement, not interfere with, standard psychiatric medications. That said, the emerging field of pharmacomicrobiomics suggests gut bacteria can affect drug metabolism — theoretically altering how your body processes medications.

The smart move: Tell your prescribing physician you’re taking probiotics. There are no known dangerous interactions, but the science of microbiome-drug interactions is still young. Better safe.

Antifungals

Fluconazole and nystatin reduce the effectiveness of Saccharomyces boulardii (a yeast-based probiotic) specifically. Other probiotic strains aren’t affected.

Immunosuppressants

Cyclosporine, tacrolimus, and corticosteroids interact unpredictably with probiotic immune modulation. If you’re on immunosuppressive therapy, probiotics are generally contraindicated (see above).

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The Future: Precision Psychobiotics

Where is all this heading? The field is moving toward personalized probiotic prescriptions based on your individual microbiome profile. A 2025 review in Frontiers in Neuroscience outlined what they’re calling the precision psychobiotics framework:

• Microbiome testing to identify which species you’re actually depleted in
• Strain matching to supplement specifically what’s missing
• Biomarker monitoring to track whether the intervention is working at a gut level, not just symptom level

I’ll be honest — this is still largely theoretical. We don’t yet have validated algorithms to match microbiome profiles to specific probiotic prescriptions. But the research infrastructure is being built. NutraIngredients ran a February 2026 feature asking “What’s next for psychobiotic research?” The answer was precision and personalization.

For now, the practical takeaway is this: if a generic multi-strain probiotic doesn’t work for you, it doesn’t mean all probiotics are useless. It may just mean you need a different strain profile. The future will make that matching much more precise.

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What Reddit Gets Right and Wrong About This

The gut-brain axis is one of the most-discussed supplement topics on Reddit, particularly in r/Supplements, r/Nootropics, and r/Microbiome. We spend a lot of time in those communities, and here’s where we think the collective wisdom lands.

What Reddit gets right:

• The emphasis on specific strains over generic “probiotic” labels. Reddit users frequently ask “which strain?” — and that’s exactly the right question.
• Skepticism about mega-dose CFU counts. The community generally understands that 100 billion CFU isn’t necessarily better than 10 billion.
• Recognition that results are highly individual. “Works for some, not for others” is a consistent theme — and it matches the clinical data.

What Reddit gets wrong:

• Overconfidence in L. rhamnosus for anxiety based on that famous mouse study. We’ve been over this — the human data doesn’t support it.
• Underrating Bifidobacterium species. Most Reddit discussions focus on Lactobacillus, but the meta-analytic evidence strongly favors Bifidobacterium-containing formulations.
• Treating all fermented foods as equivalent to targeted probiotic supplementation. Kimchi and kefir are great for general gut health, but the dose and strain specificity of supplements matters for targeted anxiety reduction.
• DIY stacking without considering contraindications. Immunocompromised users rarely get warned about real risks in community threads. That worries us.

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So Where Does This Leave Us?

Probiotics for anxiety are real, evidence-based, and modest. They’re not snake oil, and they’re not a miracle cure. Here’s what we know with reasonable confidence after 72 clinical trials:

What works:

• Multi-strain formulations containing Bifidobacterium species, at 1–10 billion CFU/day, for 4–8 weeks
• The Cerebiome combination (B. longum R0175 + L. helveticus R0052) has the most consistent human evidence
• Effects are strongest in people with clinically diagnosed anxiety or depression
• Probiotics work best as adjunctive therapy, not standalone treatment

What doesn’t:

• Single-strain Lactobacillus-only products (meta-analytic null for anxiety)
• L. rhamnosus JB-1 specifically — the famous mouse strain that failed in humans
• Prebiotics alone for anxiety (insufficient evidence)
• Mega-dose products without strain-specific evidence

What we honestly don’t know yet:

• Optimal strain combinations for specific anxiety subtypes
• Whether fermented foods can match supplement efficacy for anxiety
• How to personalize probiotic prescriptions based on individual microbiome profiles
• Why longer interventions (>8 weeks) show weaker effects

If you’re considering probiotics for anxiety, here’s my suggestion: start with a multi-strain formulation containing Bifidobacterium species (or the specific Cerebiome combination if you can find it), take 1–10 billion CFU daily, give it 4–8 weeks, and don’t expect it to replace therapy or medication. Expect a meaningful but modest reduction in symptoms — roughly comparable to what SSRIs achieve for generalized anxiety.

And please — check the contraindications section above before you start. Most people can safely take probiotics. Some people genuinely shouldn’t.

My friend with the jaw tension? She’s still taking hers. It didn’t fix everything, but she says the volume really did go down a notch. Sometimes that’s enough to make the rest of it manageable.

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This article reviews evidence from 72 randomized controlled trials and 3 major meta-analyses published through early 2026. It’s for informational purposes only and doesn’t constitute medical advice. Consult your healthcare provider before starting any supplement, especially if you take medications or have underlying health conditions.

Sources cited in this article:

• Zhang J, et al. “Efficacy of probiotics, prebiotics, and synbiotics on anxiety, depression, and sleep.” BMC Psychiatry. 2025;25:1199.
• Asad A, et al. “Effects of prebiotics and probiotics on symptoms of depression and anxiety in clinically diagnosed samples.” Nutrition Reviews. 2025;83(7):e1504-e1520.
• Zandifar A, et al. “The effect of prebiotics and probiotics on depression, anxiety, and cognitive function: A meta-analysis.” Brain and Behavior. 2025;15(3):e70401.
• Kelly JR, et al. “Lost in Translation? The potential psychobiotic Lactobacillus rhamnosus (JB-1) fails to modulate stress or cognitive performance in healthy male subjects.” Brain, Behavior, and Immunity. 2017;61:50-59.
• Bravo JA, et al. “Ingestion of Lactobacillus strain regulates emotional behavior and central GABA receptor expression in a mouse via the vagus nerve.” PNAS. 2011;108(38):16050-16055.
• Messaoudi M, et al. “Assessment of psychotropic-like properties of a probiotic formulation (Lactobacillus helveticus R0052 and Bifidobacterium longum R0175) in rats and human subjects.” British Journal of Nutrition. 2011;105(5):755-764.
• Allen AP, et al. “Bifidobacterium longum 1714 improves sleep quality in healthy adults: a double-blind, randomized, placebo-controlled crossover trial.” Scientific Reports. 2024.
• Ribera C, et al. “Fermented foods, probiotics, prebiotics, and psychiatric disorders.” Neuroscience & Biobehavioral Reviews. 2024.
• Dinan TG, Stanton C, Cryan JF. “Psychobiotics: A novel class of psychotropic.” Biological Psychiatry. 2013;74(10):720-726.
• Slykerman RF, et al. “Evaluating mental health claims on probiotic products.” SAGE Journals. 2025.
• Wen X, et al. “Probiotics for anxiety in children and adolescents.” Journal of Child and Adolescent Psychopharmacology. 2026.

Related reading:

• Best Supplements for Stress and Anxiety: Evidence-Based Rankings — Our comprehensive ranking of 10 supplements by clinical evidence
• Ashwagandha Benefits: What the Evidence Actually Shows — Closer look on the most popular adaptogen
• L-Theanine + Caffeine: What the Research Says — The nootropic stack with the strongest alignment evidence
• Magnesium for Sleep: Which Type Actually Works? — Form-by-form evidence review

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