Research
Micronutrients & recovery
In elderly populations, malnutrition and antibiotic use drive a decline in gut microbiome diversity and stability, increasing frailty and susceptibility to infection.
For older adults, maintaining a diverse, fiber-rich diet and minimizing unnecessary antibiotic use are crucial for preserving gut health and reducing frailty. Community-dwelling elderly with healthy diets can maintain microbiomes similar to young adults, proving that age itself is not the primary driver of decline.
GoodSupportsHIGH confidence
Dietary alterations are associated with a decrease in microbial diversity and increased frailty... The use of broad-spectrum antibiotics is associated with the overgrowth of Clostridium difficile which flourishes in the antibiotic-weakened gut, often resulting in a life threatening infection.
Why this rating
Supported by multiple observational studies linking frailty, antibiotic use, and microbiome composition.
Source
Diet and the development of the human intestinal microbiome
Noah Voreades et al. · Frontiers in Microbiology · 2014
DOI 10.3389/fmicb.2014.00494
narrative_reviewCited 500×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
More from this paper
- Short-term dietary interventions cause rapid but transient fluctuations in the adult gut microbiome, which typically returns to its baseline stable state once the intervention ends.Strong
- Long-term dietary patterns (specifically high plant fiber vs. high protein/fat) are the primary determinant of stable adult gut microbiome composition and enterotype classification.Good
- Weight loss interventions, regardless of macronutrient composition, consistently alter the ratio of Bacteroidetes to Firmicutes, often increasing microbial gene richness and improving metabolic parameters.Good
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