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While the eCBome and the gut microbiome are known to respond to diet macronutrient composition, interaction with micronutrient intake has been relatively unexplored. Iron (Fe) is an essential micronutrient for the function of enzymes involved in energy and lipid metabolism. Here, we evaluated how 28 days of Fe depletion and enrichment, in interaction with Low Fat-Low Sucrose (LFLS) or High Fat-High Sucrose (HFHS) diets, affect the host via the eCBome, and modulate intestinal gut microbial communities. Circulating levels of\n                    <jats:italic>N<\/jats:italic>\n                    -oleoyl-ethanolamine (OEA) showed an elevation associated with Fe-enriched LFLS diet, while the Fe-depleted HFHS diet showed an elevation of\n                    <jats:italic>N<\/jats:italic>\n                    -arachidonoyl-ethanolamine (anandamide, AEA) and a decrease of circulating linoleic acid. In parallel, the response of intestinal inflammatory mediators to Fe in the diet showed decreased levels of prostaglandins PGE\n                    <jats:sub>1<\/jats:sub>\n                    , PGE\n                    <jats:sub>3<\/jats:sub>\n                    , and 1a,1b-dihomo PGF\n                    <jats:sub>2<\/jats:sub>\n                    \u03b1 in the caecum. Individual differences in microbial taxa were less pronounced in the ileum than in the caecum, where\n                    <jats:italic>Eubacterium coprostanoligenes<\/jats:italic>\n                    group showed an increase in relative abundance associated with Fe-depleted LFLS diets. In conclusion, our study shows that Fe intake modulates the response to the macronutrient composition of the diet in mice.\n                  <\/jats:p>","DOI":"10.1017\/gmb.2025.1","type":"journal-article","created":{"date-parts":[[2025,2,14]],"date-time":"2025-02-14T07:31:12Z","timestamp":1739518272000},"source":"Crossref","is-referenced-by-count":2,"title":["Dietary iron interacts with diet composition to modulate the endocannabinoidome and the gut microbiome in mice"],"prefix":"10.1017","volume":"6","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2758-6964","authenticated-orcid":false,"given":"Fredy Alexander","family":"Guevara Agudelo","sequence":"first","affiliation":[{"name":"Universit\u00e9 Laval"},{"name":"Universit\u00e9 Laval"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nadine","family":"Leblanc","sequence":"additional","affiliation":[{"name":"Universit\u00e9 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