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Head-to-head evidence comparison — which supplement is right for you?
B. longum 1714 vs L. helveticus R0052 + B. longum R0175: they're closely matched on evidence (3 vs 3/10); they're alternatives for support mood — the best pick depends on your goals. Take the 60-second quiz for a pick tailored to your goals.
B. longum 1714 and L. helveticus R0052 + B. longum R0175 are closely matched across evidence, studies, and safety.
Verdict
Too few graded studies
Top outcomes
Verdict
Too few graded studies
Top outcomes
Shared outcomes (2)
Outcomes where both B. longum 1714 and L. helveticus R0052 + B. longum R0175 have evidence — compare verdict strength side-by-side.
1 x 10^9 to 1 x 10^10 CFU daily — the two trials that state a dose used 1 x 10^10 CFU/day (depression) and a minimum of 1 x 10^9 CFU/day (pregnancy). Neither found a benefit on its primary endpoint, so this is the dose range that has been tested, not a dose shown to work.
Any time of day
Freeze-dried capsule or sachet standardized to B. longum 1714
3 x 10^9 CFU daily of the fixed combination (L. helveticus R0052 plus B. longum R0175), the dose used in the cited founding trial, which named the strain L. acidophilus Rosell-52, and in the cited open-label MDD study. No dose-comparison study exists.
Any time of day
Fixed two-strain sachet or capsule: L. helveticus R0052 plus B. longum R0175 at 3 x 10^9 CFU
No interaction. Both have failed their most rigorous tests: 1714 found no effect on the primary endpoint in 168 adults with mild-to-moderate depression, and the R0052 + R0175 combination was null on every pre-specified outcome in 135 healthy adults.
Listed for disambiguation rather than for stacking — no trial combining them is cited here.
4 weeks
8 weeks
n/a
n/a
8 weeks
3 weeks
n/a
n/a
Effects of Bifidobacterium longum 1714 on low mood and related symptoms: A randomized, double-blind, placebo-controlled trial.
Exp Clin Psychopharmacol (2026) · Rct · n=168
PRIMARY ENDPOINT MISSED: BDI-II change vs placebo was -0.303 (95% CI -1.957 to 1.35, p=.718) at week 4 and -1.432 (95% CI -3.30 to 0.44, p=.132) at week 8
Bifidobacterium longum 1714 improves sleep quality and aspects of well-being in healthy adults: a randomized, double-blind, placebo-controlled clinical trial.
Sci Rep (2024) · Rct · n=89
PRIMARY ENDPOINT MISSED: PSQI global score improved in both groups, with no significant advantage for the strain
Bifidobacterium longum 1714 as a translational psychobiotic: modulation of stress, electrophysiology and neurocognition in healthy volunteers.
Transl Psychiatry (2016) · Pilot · n=22
PubMed classifies this as a Controlled Clinical Trial, NOT a Randomized Controlled Trial
Effect of probiotic and prebiotic vs placebo on psychological outcomes in patients with major depressive disorder: A randomized clinical trial.
Clin Nutr (2019) · Rct · n=110
BDI score fell 17.39 to 9.1 on the probiotic vs 18.18 to 15.55 on placebo and 19.72 to 14.14 on prebiotic (p=0.042)
Psychobiotic Effects on Anxiety Are Modulated by Lifestyle Behaviors: A Randomized Placebo-Controlled Trial on Healthy Adults.
Nutrients (2023) · Rct · n=135
NULL on the whole sample: 'no significant effects of probiotic intake in whole sample outcomes'
Assessment of psychotropic-like properties of a probiotic formulation (Lactobacillus helveticus R0052 and Bifidobacterium longum R0175) in rats and human subjects.
Br J Nutr (2011) · Rct
The abstract states NO sample size, NO effect sizes and NO confidence intervals for the human trial
Both B. longum 1714 and L. helveticus R0052 + B. longum R0175 are closely matched — the best choice depends on your specific health goals.
For support mood, L. helveticus R0052 + B. longum R0175 has a higher relevance score (34 vs 20).
No interaction. Both have failed their most rigorous tests: 1714 found no effect on the primary endpoint in 168 adults with mild-to-moderate depression, and the R0052 + R0175 combination was null on every pre-specified outcome in 135 healthy adults. Listed for disambiguation rather than for stacking — no trial combining them is cited here. Consult a healthcare provider for personalized advice.
The right pick depends on your goals. Answer a few quick questions for a personalised recommendation — or dig into the full evidence on each.