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Cardiometabolic Effects of Low-Fat and Full-Fat Dairy

18. Mai 2026 aktualisiert von: Kristina Petersen PhD, APD, FAHA, Penn State University

Cardiometabolic Effects of Low-Fat and Full-Fat Dairy in Healthy and Cardiometabolically At-Risk Adults

The purpose of this study is to find out if full-fat dairy and low-fat dairy have similar effects on risk factors for heart disease and diabetes. During the study, participants will consume two types of dairy products: low-fat dairy (milk, yogurt, and cheese) and full-fat dairy (milk, yogurt, and cheese). Each type of dairy will be consumed for 6 weeks with a ≥4-week break between. Measures will be taken to evaluate blood cholesterol, blood sugar, body weight, inflammation, blood pressure, heart health and dietary intake at the beginning and end of each 6 week period.

Studienübersicht

Status

Noch keine Rekrutierung

Bedingungen

Intervention / Behandlung

Detaillierte Beschreibung

The overarching goal of this clinical trial is to characterize and compare the effect of full-fat dairy to low-fat dairy on low density lipoprotein cholesterol (LDL-C) and other cardiometabolic disease (CMD) risk factors in healthy adults and those at risk for CMD. This goal will be achieved with the following objectives:

  1. Characterize the effect of full-fat dairy compared to low-fat dairy on LDL-C and other CMD risk factors in healthy adults and adults at risk for CMD after 6 weeks.
  2. Compare the effect of full-fat dairy to low-fat dairy in healthy adults vs. adults at risk for CMD after 6 weeks.

This clinical trial will test two hypotheses: 1) intake of 3 cup-equivalents/day of full-fat dairy (milk, yogurt & cheese) has equivalent effects on LDL-C and other CMD risk factors to 3 cup-equivalents/day of low-fat dairy (milk, yogurt & cheese) in adults with normal BMI and optimal/near optimal LDL-C, and in adults with overweight/obesity and elevated LDL-C after 6 weeks; 2) the effect of full-fat dairy on LDL-C and other CMD risk factors, compared to low-fat dairy, is equivalent in adults with normal BMI and optimal/near optimal LDL-C compared to adults with overweight/obesity and elevated LDL-C after 6 weeks. This trial is expected to demonstrate equivalent effects of full-fat and low-fat dairy on LDL-C and other CMD risk factors in both healthy and at-risk adults.

This is a randomized clinical trial with 2 groups of adults. Group 1 will include adults with normal BMI (18.5 -24.9 kg/m2) and optimal/near optimal LDL-C (≤ 129 mg/dL). Group 2 will include adults with overweight/obesity (25-39.9 kg/m2) and elevated LDL-C (130-190 mg/dL). Within each group, subjects will undergo two 6-week dietary conditions in random sequence order, separated by a 4-week washout: 1) 3 cup-equivalents/day of full-fat dairy; 2) 3 cup-equivalents/day of low-fat dairy. Outcomes will be assessed at the start and end of each period.

Studientyp

Interventionell

Einschreibung (Geschätzt)

178

Phase

  • Unzutreffend

Kontakte und Standorte

Dieser Abschnitt enthält die Kontaktdaten derjenigen, die die Studie durchführen, und Informationen darüber, wo diese Studie durchgeführt wird.

Studienkontakt

  • Name: Kristina Petersen, PhD
  • Telefonnummer: 814-865-7206
  • E-Mail: kup63@psu.edu

Studieren Sie die Kontaktsicherung

  • Name: Stacey Meily
  • Telefonnummer: 814-863-8622
  • E-Mail: sas117@psu.edu

Teilnahmekriterien

Forscher suchen nach Personen, die einer bestimmten Beschreibung entsprechen, die als Auswahlkriterien bezeichnet werden. Einige Beispiele für diese Kriterien sind der allgemeine Gesundheitszustand einer Person oder frühere Behandlungen.

Zulassungskriterien

Studienberechtigtes Alter

  • Erwachsene
  • Älterer Erwachsener

Akzeptiert gesunde Freiwillige

Ja

Beschreibung

Inclusion Criteria:

  • BMI 18.5 to 39.9 kg/m2
  • LDL-C ≤190 mg/dL assessed by the Modified Sampson-NIH Equation
  • Currently consume milk, yogurt, and/or cheese daily
  • Willing to eat 3 servings of dairy (milk, yogurt, cheese) for two 6-week periods during the study

Exclusion Criteria:

  • Hemoglobin <13.2 g/dL for men or < 11.7 g/dL for women at screening
  • Fasting triglycerides >350 mg/dL at screening
  • ≥10% change in body weight within the 6 months prior to enrollment
  • Blood pressure >140/90 mmHg at screening
  • Fasting glucose ≥126 mg/dL
  • Type 1 or type 2 diabetes
  • Takes any (prescription or over-the-counter) anti-hypertensive, lipid-lowering, glucose-lowering or anti-inflammatory drugs, or drugs that alter body weight
  • Intake of supplements that affect the outcomes of interest (i.e., lipids, blood pressure, glucose, body weight, inflammation and microbiome) and are unwilling to cease during the study period.
  • Unwilling to refrain from starting to take any supplements, vitamins, nutritional products, or health foods that are not prescribed by a doctor for the duration of the study
  • History of liver, kidney, or autoimmune disease
  • Prior cardiovascular event (e.g., stroke, heart attack)
  • Current pregnancy or intention of pregnancy within the next 12 months
  • Lactation within the prior 6 months
  • Dairy allergy/intolerance/sensitivity/dislike
  • Antibiotic use within the prior four weeks
  • Oral steroid use within the prior four weeks
  • Use of tobacco or nicotine-containing products within the past 6 months
  • History of cancer at any site within the past 10 years (eligible if ≥10 years without recurrence) or non-melanoma skin cancer within the past 5 years (eligible if ≥5 years without recurrence)
  • Participation in another clinical trial within 60 days of baseline
  • Currently following a restricted or weight-loss diet
  • Prior bariatric surgery
  • Intake of >14 alcoholic drinks/week and/or not willing to avoid alcohol consumption for 48 hours prior to test visits
  • Does not speak and/or understand English
  • Unwilling to refrain from donating blood and/or plasma during the study
  • Weight <110 lb
  • Lactose intolerance or sensitivity
  • Unwilling to contact study staff before enrolling in other health-related research and avoid participating in any research that may interfere with this study
  • For individuals taking thyroid medication: abnormal thyroid stimulated hormone (TSH) concentration, or change in dose of thyroid medication within the last 6 months
  • Principal Investigator discretion related to the potential participant's ability to adhere to the study requirements, including being able to come to attend visits

Studienplan

Dieser Abschnitt enthält Einzelheiten zum Studienplan, einschließlich des Studiendesigns und der Messung der Studieninhalte.

Wie ist die Studie aufgebaut?

Designdetails

  • Hauptzweck: Sonstiges
  • Zuteilung: Zufällig
  • Interventionsmodell: Crossover-Aufgabe
  • Maskierung: Single

Waffen und Interventionen

Teilnehmergruppe / Arm
Intervention / Behandlung
Experimental: Healthy Adults
Adults with normal BMI (18.5 -24.9 kg/m2) and optimal/near optimal LDL-C (≤ 129 mg/dL).
3 cup-equivalents/day of full-fat dairy (milk, yogurt & cheese)
3 cup-equivalents/day of low-fat dairy (milk, yogurt & cheese)
Experimental: Adults at risk for cardiometabolic diseases
Adults with overweight/obesity (25-39.9 kg/m2) and elevated LDL-C (130-190 mg/dL
3 cup-equivalents/day of full-fat dairy (milk, yogurt & cheese)
3 cup-equivalents/day of low-fat dairy (milk, yogurt & cheese)

Was misst die Studie?

Primäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
LDL-cholesterol change
Zeitfenster: 6 weeks
Assessed from fasting blood draw expressed in mg/dL. LDL-cholesterol will be calculated via the Modified Sampson-NIH Equation. Change in LDL-cholesterol will be calculated as the mean of the end of intervention measures (i.e., mean of day 1 and day 2 values) minus the mean of the pre-intervention measures (i.e., mean of day 1 and day 2 values).
6 weeks

Sekundäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Apolipoprotein B change
Zeitfenster: 6 weeks
Assessed from fasting blood draw expressed in mg/dL.
6 weeks
Triglycerides change
Zeitfenster: 6 weeks
Assessed from fasting blood draw expressed in mg/dL.
6 weeks
Total cholesterol change
Zeitfenster: 6 weeks
Assessed from fasting blood draw expressed in mg/dL.
6 weeks
HDL-cholesterol change
Zeitfenster: 6 weeks
Assessed from fasting blood draw expressed in mg/dL.
6 weeks
non-HDL cholesterol change
Zeitfenster: 6 weeks
Assessed from fasting blood draw expressed in mg/dL.
6 weeks
Glucose change
Zeitfenster: 6 weeks
Assessed from fasting blood draw expressed in mg/dL.
6 weeks
Insulin change
Zeitfenster: 6 weeks
Assessed from fasting blood draw expressed in micro IU/ml.
6 weeks
Fructosamine change
Zeitfenster: 6 weeks
Assessed from fasting blood draw expressed in umol/L.
6 weeks
Homeostatic model of insulin resistance (HOMA-IR) change
Zeitfenster: 6 weeks
Calculated from insulin and glucose measured from a fasting blood sample. Calculated as (insulin × glucose) / 22.5
6 weeks
C-reactive protein change
Zeitfenster: 6 weeks
Assessed from fasting blood draw expressed in mg/L.
6 weeks
Body weight change
Zeitfenster: 6 weeks
Measured in the fasting state using a calibrated electronic scale.
6 weeks
Brachial systolic and diastolic blood pressure change
Zeitfenster: 6 weeks
Measured in the fasting state using a SphymoCor Xcel (Atcor Medical)
6 weeks
Central systolic and diastolic blood pressure change
Zeitfenster: 6 weeks
Measured in the fasting state using a SphymoCor Xcel (Atcor Medical)
6 weeks
Carotid-femoral pulse wave velocity change
Zeitfenster: 6 weeks
Measured in the fasting state using a SphymoCor Xcel (Atcor Medical)
6 weeks
Diet quality change
Zeitfenster: 6 weeks
Healthy Eating Index-2020 assessed using 24-hour recalls
6 weeks

Mitarbeiter und Ermittler

Hier finden Sie Personen und Organisationen, die an dieser Studie beteiligt sind.

Sponsor

Ermittler

  • Hauptermittler: Kristina Petersen, PhD, The Pennsylvania State University

Studienaufzeichnungsdaten

Diese Daten verfolgen den Fortschritt der Übermittlung von Studienaufzeichnungen und zusammenfassenden Ergebnissen an ClinicalTrials.gov. Studienaufzeichnungen und gemeldete Ergebnisse werden von der National Library of Medicine (NLM) überprüft, um sicherzustellen, dass sie bestimmten Qualitätskontrollstandards entsprechen, bevor sie auf der öffentlichen Website veröffentlicht werden.

Haupttermine studieren

Studienbeginn (Geschätzt)

8. September 2026

Primärer Abschluss (Geschätzt)

31. August 2028

Studienabschluss (Geschätzt)

31. August 2028

Studienanmeldedaten

Zuerst eingereicht

18. Mai 2026

Zuerst eingereicht, das die QC-Kriterien erfüllt hat

18. Mai 2026

Zuerst gepostet (Tatsächlich)

26. Mai 2026

Studienaufzeichnungsaktualisierungen

Letztes Update gepostet (Tatsächlich)

26. Mai 2026

Letztes eingereichtes Update, das die QC-Kriterien erfüllt

18. Mai 2026

Zuletzt verifiziert

1. Mai 2026

Mehr Informationen

Begriffe im Zusammenhang mit dieser Studie

Zusätzliche relevante MeSH-Bedingungen

Andere Studien-ID-Nummern

  • DAIRY

Plan für individuelle Teilnehmerdaten (IPD)

Planen Sie, individuelle Teilnehmerdaten (IPD) zu teilen?

JA

IPD-Sharing-Zeitrahmen

Study protocol and SAP will be uploaded to clinicaltrials.gov prior to enrollment of the first participant

Art der unterstützenden IPD-Freigabeinformationen

  • STUDIENPROTOKOLL
  • SAFT

Arzneimittel- und Geräteinformationen, Studienunterlagen

Studiert ein von der US-amerikanischen FDA reguliertes Arzneimittelprodukt

Nein

Studiert ein von der US-amerikanischen FDA reguliertes Geräteprodukt

Nein

Diese Informationen wurden ohne Änderungen direkt von der Website clinicaltrials.gov abgerufen. Wenn Sie Ihre Studiendaten ändern, entfernen oder aktualisieren möchten, wenden Sie sich bitte an register@clinicaltrials.gov. Sobald eine Änderung auf clinicaltrials.gov implementiert wird, wird diese automatisch auch auf unserer Website aktualisiert .