Evidence map›Paper›PMID 36163070›Full record

Trial reportLipids in health and disease2022

Replacing saturated fatty acids with polyunsaturated fatty acids increases the abundance of Lachnospiraceae and is associated with reduced total cholesterol levels-a randomized controlled trial in healthy individuals.

Vibeke H Telle-Hansen, Line Gaundal, Nasser Bastani, Ida Rud, Marte G Byfuglien, Terje Gjøvaag, Kjetil Retterstøl, Kirsten B Holven, Stine M Ulven, Mari C W Myhrstad

Registry-linked trialAbstract readRandomized Controlled Trial
In one paragraph

Trial report in Lipids in health and disease, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT03658681 (Fat Quality and Blood Glucose), which is not on this map. Cited by 25 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
25citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

NCT03658681 nacompletednot on this map

Fat Quality and Blood Glucose

TypeinterventionalSponsorOslo Metropolitan UniversityRan2018 to 2019Enrolled20ConditionsPostprandial Blood Glucose, Gut Microbiota, SatietyArmsSaturated fat 14.9 E%, Polyunsaturated fat 13.6 E%
3 · Its place in the literature

Who cites it

25 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
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  15. Dietary Intake and Gut Microbiome in CKD.Clinical journal of the American Society of Nephrology : CJASN · 2025
    Review
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

10 authors.

Vibeke H Telle-Hansen *Faculty of Health Sciences, Oslo Metropolitan University, St. Olavsplass, Postbox 4, 0130, Oslo, Norway. vtelle@oslomet.no.
Line Gaundal *Faculty of Health Sciences, Oslo Metropolitan University, St. Olavsplass, Postbox 4, 0130, Oslo, Norway.
Nasser BastaniDepartment of Nutrition, Institute of Basic Medical Sciences, Faculty of Medicine, University of Oslo, Blindern, P.O. Box 1046, 0317, Oslo, Norway.
Ida RudNofima -Norwegian Institute of Food, Fisheries and Aquaculture Research, Osloveien 1, 1433, Ås, Norway.
Marte G ByfuglienMills AS, Sofienberggt. 19, 0558, Oslo, Norway.
Terje GjøvaagFaculty of Health Sciences, Oslo Metropolitan University, St. Olavsplass, Postbox 4, 0130, Oslo, Norway.
Kjetil RetterstølDepartment of Nutrition, Institute of Basic Medical Sciences, Faculty of Medicine, University of Oslo, Blindern, P.O. Box 1046, 0317, Oslo, Norway.
Kirsten B HolvenDepartment of Nutrition, Institute of Basic Medical Sciences, Faculty of Medicine, University of Oslo, Blindern, P.O. Box 1046, 0317, Oslo, Norway.
Stine M UlvenDepartment of Nutrition, Institute of Basic Medical Sciences, Faculty of Medicine, University of Oslo, Blindern, P.O. Box 1046, 0317, Oslo, Norway.
Mari C W MyhrstadFaculty of Health Sciences, Oslo Metropolitan University, St. Olavsplass, Postbox 4, 0130, Oslo, Norway.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundImproving dietary fat quality strongly affects serum cholesterol levels and hence the risk of cardiovascular diseases (CVDs). Recent studies have identified dietary fat as a potential modulator of the gut microbiota, a central regulator of host metabolism including lipid metabolism. We have previously shown a significant reduction in total cholesterol levels after replacing saturated fatty acids (SFAs) with polyunsaturated fatty acids (PUFAs). The aim of the present study was to investigate the effect of dietary fat quality on gut microbiota, short-chain fatty acids (SCFAs), and bile acids in healthy individuals. In addition, to investigate how changes in gut microbiota correlate with blood lipids, bile acids, and fatty acids.

methodsSeventeen participants completed a randomized, controlled dietary crossover study. The participants received products with SFAs (control) or PUFAs in random order for three days. Fecal samples for gut microbiota analyses and fasting blood samples (lipids, fatty acids, and bile acids) were measured before and after the three-day intervention.

resultsOf a panel of 40 bacteria, Lachnospiraceae and Bifidobacterium spp. were significantly increased after intervention with PUFAs compared with SFAs. Interestingly, changes in Lachnospiraceae, as well as Phascolarlactobacterium sp. and Eubacterium hallii, was also found to be negatively correlated with changes in total cholesterol levels after replacing the intake of SFAs with PUFAs for three days. No significant differences in SCFAs or bile acids were found after the intervention.

conclusionReplacing SFAs with PUFAs increased the abundance of the gut microbiota family of Lachnospiraceae and Bifidobacterium spp. Furthermore, the reduction in total cholesterol after improving dietary fat quality correlated with changes in the gut microbiota family Lachnospiraceae. Future studies are needed to reveal whether Lachnospiraceae may be targeted to reduce total cholesterol levels.

trial registrationThe study was registered at Clinical Trials ( https://clinicaltrials.gov/ , registration identification number: NCT03658681).

Indexed as

Fatty AcidsFatty Acids, UnsaturatedBile Acids and SaltsCholesterolCross-Over StudiesDietary FatsHumansLipidsBile Acids and SaltsCholesterolDietary FatsFatty AcidsFatty Acids, UnsaturatedLipidsDietary fatGut microbiotaLachnospiraceaePolyunsaturated fatty acidsRandomized controlled trialTotal cholesterol

Identifiers

PMID36163070
PMCPMC9511723

What OpenQuestion holds

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Registered trials

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.