What the evidence says. Conflicting results across studies; benefit uncertain.
What is L. helveticus R0052 + B. longum R0175?
L. helveticus R0052 + B. longum R0175 (L. helveticus R0052 + B. longum R0175 (Cerebiome)) is a probiotic strain used for reduced self-reported anxiety and depression scores (hads, hscl-90) in healthy volunteers over 30 days (messaoudi 2011). NutriDex grades the human evidence as Mixed. L. helveticus R0052 + B. longum R0175 (Cerebiome/Probio'Stick) is the most-studied "psychobiotic" formulation. A foundational 30-day RCT in healthy volunteers (Messaoudi 2011) reduced self-reported anxiety/depression scores (HADS, HSCL-90) and lowered urinary free cortisol, and an 8-week RCT in major depressive disorder (Kazemi 2018) showed a significantly greater fall in Beck Depression Inventory score vs placebo (-8.3 vs -2.6, p=0.042). However, a well-conducted 8-week RCT for low mood (Romijn 2017, n=79) found NO benefit over placebo, so overall human evidence is mixed/moderate rather than definitive. Effects are strain- and population-specific; most data are small trials or open-label pilots.
Purported Benefits
✓Reduced self-reported anxiety and depression scores (HADS, HSCL-90) in healthy volunteers over 30 days (Messaoudi 2011)
3 x 10^9 CFU/day (combined R0052 + R0175), typically one 1.5 g sachet or capsule daily for 4-8 weeks; trials dosed once daily, often in the morning, on an empty stomach or with a cool drink.
Active Compounds
Cerebiome (Lallemand Health Solutions) — research-grade brandProbio'Stick / Zenix — 1.5 g sachet formulationsBranded consumer products containing L. helveticus R0052 + B. longum R0175Freeze-dried powder sachets and capsules
Safety & Cautions
⚠
Well tolerated in trials with no serious adverse events; mild transient GI effects (bloating, gas) possible. As with all live probiotics, use caution in the critically ill, those with central venous catheters, severe immunocompromise, or short-gut/intestinal-barrier compromise, where rare bacteremia risk exists. Not a substitute for established antidepressant or anxiolytic therapy; discuss with a clinician if used adjunctively for diagnosed mood disorders. Educational only — always check with your doctor or pharmacist before combining L. helveticus R0052 + B. longum R0175 with any medicine.
Common questions about L. helveticus R0052 + B. longum R0175
What is L. helveticus R0052 + B. longum R0175 used for?
L. helveticus R0052 + B. longum R0175 is most often taken for Reduced self-reported anxiety and depression scores (HADS, HSCL-90) in healthy volunteers over 30 days (Messaoudi 2011), Lowered urinary free cortisol, suggesting blunted stress/HPA-axis reactivity (Messaoudi 2011), Greater reduction in Beck Depression Inventory score vs placebo in major depressive disorder over 8 weeks (Kazemi 2018), Reduced stress-related GI/somatization complaints (abdominal pain, nausea/vomiting) in stressed adults. Psychobiotic duo studied for mood, anxiety, and stress reactivity
Does L. helveticus R0052 + B. longum R0175 work — what does the evidence say?
Mixed evidence. Conflicting results across studies; benefit uncertain. L. helveticus R0052 + B. longum R0175 (Cerebiome/Probio'Stick) is the most-studied "psychobiotic" formulation. A foundational 30-day RCT in healthy volunteers (Messaoudi 2011) reduced self-reported anxiety/depression scores (HADS, HSCL-90) and lowered urinary free cortisol, and an 8-week RCT in major depressive disorder (Kazemi 2018) showed a significantly greater fall in Beck Depression Inventory score vs placebo (-8.3 vs -2.6, p=0.042). However, a well-conducted 8-week RCT for low mood (Romijn 2017, n=79) found NO benefit over placebo, so overall human evidence is mixed/moderate rather than definitive. Effects are strain- and population-specific; most data are small trials or open-label pilots.
What is the typical dose of L. helveticus R0052 + B. longum R0175?
3 x 10^9 CFU/day (combined R0052 + R0175), typically one 1.5 g sachet or capsule daily for 4-8 weeks; trials dosed once daily, often in the morning, on an empty stomach or with a cool drink.
Is L. helveticus R0052 + B. longum R0175 safe? Any cautions or side effects?
Well tolerated in trials with no serious adverse events; mild transient GI effects (bloating, gas) possible. As with all live probiotics, use caution in the critically ill, those with central venous catheters, severe immunocompromise, or short-gut/intestinal-barrier compromise, where rare bacteremia risk exists. Not a substitute for established antidepressant or anxiolytic therapy; discuss with a clinician if used adjunctively for diagnosed mood disorders.
How many studies support L. helveticus R0052 + B. longum R0175?
NutriDex cites 10 sources for L. helveticus R0052 + B. longum R0175, graded "Mixed".
Cite this page
APA
Peh, D. (2026). L. helveticus R0052 + B. longum R0175 (L. helveticus R0052 + B. longum R0175 (Cerebiome)): Benefits, Dosage, Side Effects & Evidence. NutriDex — The Supplement Research Compendium. Retrieved 16 Sept 2026, from https://nutridex.info/s/l-helveticus-r0052
BibTeX
@misc{nutridex_l_helveticus_r0052,
author = {Peh, Daryl},
title = {L. helveticus R0052 + B. longum R0175 (L. helveticus R0052 + B. longum R0175 (Cerebiome)): Benefits, Dosage, Side Effects \& Evidence},
year = {2026},
howpublished = {NutriDex --- The Supplement Research Compendium},
url = {https://nutridex.info/s/l-helveticus-r0052},
note = {Reviewed by Dr Daryl Peh, MBBS Singapore, MMed FM. Accessed 2026-09-16}
}
For medical claims, citing the underlying primary studies linked above is preferred. NutriDex is an educational reference, not medical advice.