Higher fiber intake was associated with cancer immunotherapy response
Human observational studies linked higher fiber consumption with better treatment response. Mouse experiments also examined dietary changes, but cannot establish that those changes improve outcomes in patients.
Based on the published abstract. The full paper may contain additional methods, results and limitations.
The 30-second takeaway
Among cancer patients receiving immune checkpoint inhibitors, a type of immunotherapy, higher fiber consumption was associated with better treatment response than lower consumption. The human evidence was observational, so it cannot establish that fiber caused the difference. Findings about fasting or restricted nutrients in mice do not demonstrate dietary benefits for patients.
The abstract provides no confidence interval, follow-up period or definition of higher versus lower fiber intake for the pooled human estimate. Observational findings cannot establish a dietary treatment effect.
What researchers found
Therapeutic response in human prospective cohorts
Higher versus lower fiber consumption: pooled odds ratio 5.79. Follow-up length and confidence interval were not reported.
What response odds mean
Odds compare the chance of responding with the chance of not responding within a group. The pooled ratio compares those odds between dietary groups; it does not mean response probability was multiplied by the same amount.
Mouse outcomes are different
Mouse experiments measured tumor size after dietary changes, including fasting and restricted nutrient availability. Human studies examined response and survival outcomes. These different endpoints and populations limit how directly the animal findings can inform conclusions about patients.
The original publication
Gut microbiome changes and cancer immunotherapy outcomes associated with dietary interventions: a systematic review of preclinical and clinical evidence.
Somodi C, Dora D, Horváth M et al.
J Transl Med · 2025
- PubMed ID
- 40629403
- Record checked
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