Fiber vs Probiotics for digestion
Short answer: For digestion, users rate them about the same: 83% report improvement with Fiber (30 reports) and 84% with Probiotics (86 reports).
Fiber has 1,399 meta-analyses and 3,260 randomized trials on PubMed; Probiotics has 2,293 and 2,235.
Based on 66 reports about Fiber and 479 about Probiotics. Not medical advice.
| Fiber Supplement | Probiotics Supplement | |
|---|---|---|
| Users say it helped | 70%helped31 reports · medium confidence | 63%helped144 reports · high confidence |
| Verdict | Mostly positive | Mostly positive |
| Research | AResearch: Strong | AResearch: Strong |
| Meta-analyses / RCTs | 1,399 / 3,260 | 2,293 / 2,235 |
| Mainly used for | ||
| Digestion % reporting improvement | 83% (30) | 84% (86) |
| Mood % reporting improvement | — | 100% (54) |
| Anxiety % reporting improvement | — | 90% (29) |
| Energy % reporting improvement | — | 80% (10) |
| Focus % reporting improvement | — | 70% (10) |
| Common side effects | can exacerbate | stomach issues, brain fog, diarrhea, withdrawal |
| Typical dose reported | 1/2 teaspoon / with wet food | 2 capsules / daily |
Fiber supplementation is effective at improving constipation. Particularly, psyllium, doses >10 g/d and treatment durations of at least 4 weeks appear optimal, though caution is needed when interpreting the results due to considerable heterogeneity. These findings provide promising evidence on the optimal type and regime of fiber supplementation, which could be used to standardize recommendations to patients. The protocol for this review is registered at PROSPERO as CRD42020191404.
Am J Clin Nutr, 2022 ↗“I truly feel much less stressed in traffic/at work, etc. I cannot believe how little fiber my family has, and therefore I grew up having.”
Some combinations of probiotics or strains may be beneficial in IBS. However, certainty in the evidence for efficacy by GRADE criteria was low to very low across almost all of our analyses.
Gastroenterology, 2023 ↗“What finally made a difference was taking probiotics...I felt better fairly quickly.”
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Percentages come from first-hand user reports and are not clinical outcomes. Talk to a doctor before starting, stopping or combining anything. How we rate