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Head-to-head evidence comparison — which supplement is right for you?
Methylfolate and Probiotics are closely matched across evidence, studies, and safety.
Verdict
Likely helps
13 of 15 studies with measurable effects showed benefit.
Top outcomes
Verdict
Probably helps
18 of 26 studies with measurable effects showed benefit.
Top outcomes
Shared outcomes (2)
Outcomes where both Methylfolate and Probiotics have evidence — compare verdict strength side-by-side.
400-800mcg daily
Morning with or without food, Consistent daily timing
L-Methylfolate (5-MTHF)
10-20 billion CFU
With or without food (strain-dependent), Same time daily for consistency
Capsules with multiple strains
2-4 weeks
1-3 weeks
4-8 weeks
Days to weeks
2-4 weeks
4-8 weeks
4-8 weeks
First 1-2 weeks
Efficacy of B-vitamins and vitamin D therapy in improving depressive and anxiety disorders: a systematic review of randomized controlled trials
Nutritional neuroscience (2023) · Systematic review · n=2256
Systematic review examining Methylfolate efficacy
Systematic Review and Meta-Analysis of L-Methylfolate Augmentation in Depressive Disorders
Pharmacopsychiatry (2022) · Meta analysis · n=6707
In the meta-analysis of categorical Hamilton Rating Scale for Depression-17 response, (three studies, N=483) adjunctive L-methylfolate was associated with a small effect versus antidepressant monotherapy (relative risk: 1.25, 95% confidence interval [CI]=1.08 to 1.46, p=0.004).
Folic acid/methylfolate for the treatment of psychopathology in schizophrenia: a systematic review and meta-analysis
Psychopharmacology (2018) · Meta analysis · n=925
Pooled FA + AP treatments were more effective than placebo + AP for negative symptoms (N = 5, n = 281; SMD = -0.25, 95% CI = -0.49, -0.01, p = 0.04, I2 = 0%).
Preventive Effect of Probiotics on Oral Mucositis Induced by Cancer Treatment: A Systematic Review and Meta-Analysis
International journal of molecular sciences (2022) · Meta analysis · n=708
Three trials using Lactobacilli-based probiotics reported that the incidence of oral mucositis in the probiotic group was significantly low (risk ratio [RR] = 0.84, 95% confidence interval [CI] = 0.77−0.93, p = 0.0004).
Probiotics for treating acute infectious diarrhoea
The Cochrane database of systematic reviews (2020) · Meta analysis · n=12127
Effect size was similar in the sensitivity analysis and marked heterogeneity persisted.
Probiotics for the prevention of Clostridium difficile-associated diarrhea in adults and children
The Cochrane database of systematic reviews (2017) · Meta analysis · n=9955
A complete case analysis (i.e. participants who completed the study) among trials investigating CDAD (31 trials, 8672 participants) suggests that probiotics reduce the risk of CDAD by 60%.
Based on meta-analysis showing small effect size for adjunctive L-methylfolate. RCT showed efficacy at high doses but effectiveness appears modest. Risk increases with higher doses due to overmethylation symptoms.
Based on meta-analyses showing benefits for IBS and digestive symptoms. Effect sizes varied considerably between studies with low to very low certainty of evidence. Initial GI symptoms common when starting but typically resolve within 1-2 weeks.
AI-estimated from published studies. Interpret as directional guidance.
Both Methylfolate and Probiotics are closely matched — the best choice depends on your specific health goals.
For prenatal support, Methylfolate has a higher relevance score (95 vs 75).
No known interactions between Methylfolate and Probiotics have been documented in our database. However, always consult a healthcare provider before combining supplements.