Non-steroidal anti-inflammatory drugs (NSAIDs)
Supplement
Mentioned as a potential factor affecting intestinal permeability, though the speaker was unaware of specific literature on the topic.
Mentioned in 2 videos
Videos Mentioning Non-steroidal anti-inflammatory drugs (NSAIDs)

Responders, Non-Responders, and Fish Oil (Episode 61)
Stronger By Science
Drugs that, when used regularly at high doses by young, healthy individuals, may blunt training adaptations by interfering with acute inflammatory processes essential for remodeling.

Intestinal Permeability: the Bacterial link to Aging, Brain Barrier Dysfunction & Metabolic Disorder
FoundMyFitness
Mentioned as a potential factor affecting intestinal permeability, though the speaker was unaware of specific literature on the topic.