Meta-analysisindependent cross-checkabstract only checked I-DRY-09 standard review

78,529 young people: dairy of all kinds linked to acne

Dairy Intake and Acne Vulgaris: A Systematic Review and Meta-Analysis of 78,529 Children, Adolescents, and Young Adults.

Overview

Juhl CR et al.. Nutrients 2018 · PMID 30096883 · DOI 10.3390/nu10081049

Any dairy OR 1.25; cheese 1.22; yogurt 1.36.

Does the study support the specific claim? Partly · Methodological quality: moderate

Study explained simply

What did the researchers want to find out?: Dairy and acne.
How was the study done?: Meta-analysis.
How many people, animals or samples were studied?: 78,529 young people.
What was actually found?: All dairy types associated.
How large was the observed effect?: OR 1.25 (1.15-1.36).
What do the results mean in everyday life?: Possible link; cheese included.
What are the study's limitations?: Publication bias.
What does it say about Elawady's specific claim?: Supports association; no milk-vs-cheese split.
Do the results apply to Germany and Europe?: Moderate.
What can explicitly not be concluded from this study?: Causation.

Authors: Juhl CR et al.
Journal: Nutrients
Year: 2018
Identifier: PMID 30096883 DOI 10.3390/nu10081049
Verification: verified – PubMed efetch 2026-10-25
Retracted: no
Corrections: none
Extent checked: abstract only
Conflicts of interest and funding: G.B.E.J. has received honoraria from AbbVie, MSD, Pfizer, Pierre-Fabre, and UCB for participation on advisory boards, and grants from Abbvie, Actelion, Janssen-Cilag, Leo Pharma, Novartis, and Regeneron for participation as an investigator, and received speaker honoraria from AbbVie, Galderma, Leo Pharma, and MSD. He has furthermore received unrestricted research grants from AbbVie and Leo Pharma. He has received travel grants from AbbVie, Celgene, Desitin, and Novartis. GBEJ’s sponsors were not involved in any parts of this article (design, conduct, collection, management, analysis, interpretation, preparation, approval, review, decision to submit). H.K.M.B. has received a grant from the Danish Dairy Research Foundation. None of the funding agencies had any role in the design, analysis, or writing of this article.

Dairy intake and acne in ages 7-30.

Study design: Meta-analysis – Systematic review and meta-analysis of observational studies.
Population: Children, adolescents, young adults
Country: Multinational
Period: Search to 11 Dec 2017
Sample size: 14 studies; 78,529 (23,046 cases)
Inclusion and exclusion criteria: Observational studies, ages 7-30.

Results: Any dairy OR 1.25 (1.15-1.36); any milk 1.28 (1.13-1.44); low-fat/skim 1.32 (1.16-1.52); cheese 1.22 (1.00-1.50); yogurt 1.36 (1.05-1.77); >=2 glasses/day 1.43 (1.09-1.88). Publication bias (p=0.0047); adjusted results attenuated.
Absolute risks: not reported
Authors' conclusion: Any dairy associated with increased OR for acne; interpret with caution due to heterogeneity and bias.

Modest ORs, attenuated after adjustment.

Supporting C-DRY-08; shows cheese also associated.

I-DRY-08 (no yogurt/cheese association).

Includes European data (Danish authors).

Consistent but biased observational evidence.

Multidimensional assessment
Multidimensional assessment
Authenticity of the source	verified
Methodological quality	moderate
Risk of bias	some concerns
Precision of results	high
Directness	direct
Reproducibility	partly replicated
Consistency with the overall evidence	consistent
Regional transferability	moderate
Adequacy of the interpretation (by the archive)	not applicable

RCTs.