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Head-to-head evidence comparison — which supplement is right for you?
Probiotics wins 3 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Probably helps
18 of 26 studies with measurable effects showed benefit.
Top outcomes
Verdict
Mixed evidence
2 of 6 studies with measurable effects showed benefit.
Top outcomes
Shared outcomes (1)
Outcomes where both Probiotics and Reishi have evidence — compare verdict strength side-by-side.
10-20 billion CFU
With or without food (strain-dependent), Same time daily for consistency
Capsules with multiple strains
1-3g dried mushroom or 500-1500mg extract
Evening (for sleep), With or without food
Dual-extract (water + alcohol) capsules or powder
2-4 weeks
4-8 weeks
4-8 weeks
First 1-2 weeks
4-8 weeks
2-4 weeks
4-8 weeks
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%.
Identifying immunostimulatory herbal supplements that may flare autoimmune skin diseases: a systematic scoping review
Lupus science & medicine (2025) · Systematic review · n=469
We identified 227 herbal supplements with immunostimulatory properties, of which 15 were most strongly supported by the evidence.
Ganoderma lucidum (Reishi) an edible mushroom; a comprehensive and critical review of its nutritional, cosmeceutical, mycochemical, pharmacological, clinical, and toxicological properties
Phytotherapy research : PTR (2021) · Systematic review
In particular, quality clinical data are intensely needed to support pharmacological activities for human use.
Use of Ganoderma lucidum (Ganodermataceae, Basidiomycota) as Radioprotector
Nutrients (2020) · Meta analysis
From a total number of 1109 records identified, 15 full text articles were eligible, none of them were clinical trials.
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.
Based on systematic reviews identifying immunostimulatory properties. Meta-analysis for cancer adjuvant therapy showed positive immune response (RR 1.50). Quality clinical data still needed. Effect varies significantly by extract type and standardization.
AI-estimated from published studies. Interpret as directional guidance.
Probiotics has a higher evidence score (9/10 vs 7/10) and wins in 3 of 3 categories.
For support immune system, Reishi has a higher relevance score (80 vs 75).
No known interactions between Probiotics and Reishi have been documented in our database. However, always consult a healthcare provider before combining supplements.