Research
Mixed
Humans have evolved anatomical and physiological adaptations (elongated small intestine, reduced colon) that exacerbate the decoupling of host and microbial nutrient status compared to other primates.
Your anatomy is optimized for high-digestibility foods. To support your gut microbiome, you must consciously introduce low-digestibility fibers that your anatomy doesn't naturally prioritize, as your evolved gut structure favors rapid absorption over microbial fermentation.
ModerateSupportsMEDIUM confidence
Humans exhibit elongated small intestines and truncated colons compared to closely related primates when adjusted for body size, the result of our increasing commitment to calorie-rich, high HDD diets during human evolution.
Why this rating
Based on comparative anatomy and evolutionary theory presented.
Source
Decoupled Nutrient Status: a framework to disentangle host from microbial responses to diets that vary in digestibility
Emily M. Venable et al. · Frontiers in Food Science and Technology · 2024
DOI 10.3389/frfst.2024.1469470
narrative_reviewCited 3×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
More from this paper
- High host-driven digestibility (HDD) diets, such as ultra-processed foods, decouple host and microbial nutrient status by maximizing small intestinal absorption, which leads to host energy surplus and gut microbial nutrient limitation.Good
- High HDD diets shift gut microbial community composition from fiber-degrading taxa (e.g., Prevotella) to mucin-degrading taxa (e.g., Bacteroides, Akkermansia) due to nutrient limitation.Good
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