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NCT Number: NCT07705724

Effect Of Whole or Skimmed Milk Greek Yogurt on Integrated Muscle Protein Synthesis, Glucose Homeostasis, and Cognition in Post-Menopausal Women

The study will examine the impact of adding two servings per day of skimmed or whole milk Greek yogurt on integrated muscle protein synthesis (iMPS), blood sugar control, and cognition in post-menopausal women with overweight and obesity.

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Key information

Age range

50 year–65 year

Sex eligibility

Female

Study type

Interventional

Phase

Not applicable

Primary location

University of Arkansas for Medical Sciences

Little Rock, Arkansas, 72205, United States

Location contact

David D Church, PhD

CONTACT

[email protected]

501-526-5769

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Aged 50 to 65 years
  • Body mass index ≥25 to <40 kg/m2 or body fat ≥36%
  • Able to provide informed consent
  • Absence of menstruation for ≥12 months without the use of hormonal contraceptives, or one of the following:
  • Another medical cause of menopause e.g., history of bilateral oophorectomy
  • Clinician-confirmed menopausal status for those with hysterectomy and retained/unknown ovaries
  • Partial/total hysterectomy ≥12 months ago and current age ≥55 years

Exclusion criteria

  • Allergy or intolerance to dairy products (other allergies or intolerances may be excluded if they are not compatible with the study meals and how they are prepared)
  • Conditions, medications, or recent changes in medications that cause participants to be metabolically unstable (e.g., renal, cardiovascular, thyroid, polycystic ovary syndrome, type-1 and type-2 diabetes)
  • Gastric bypass/bariatric surgery in the previous 5 years
  • Pregnancy or nursing in the prior 12 months
  • Weight loss or gain >5 kg in the last two months
  • Unable or unwilling to suspend use of blood thinning medications and non-steroidal anti-inflammatory drugs for the duration of the study
  • Unwilling to abstain from vigorous exercise for the study period
  • Does not or will not eat all foods on the standardized diet (e.g., allergies, intolerances, or taste preferences)
  • Participants may be excluded at the Principal Investigator's discretion if their health or body composition is not compatible with the required study procedures

Treatment and study plan

Skimmed vs Whole Milk Greek Yogurt

Other

Participants will be randomized to receive a standardized diet with either skimmed milk or whole milk Greek yogurt.

Primary outcomes

  1. Integrated Muscle Protein Synthesis (iMPS)

    Time frame: 1 week

    Integrated muscle protein synthesis expressed as the fractional synthetic rate (%/day).

Secondary outcomes

  1. Glucose Homeostasis

    Time frame: 1 week

    Mean glucose and mean amplitude of glucose excursions (MAGE) as determined from continuous glucose monitors (CGMs) (mg/dL).

Other outcomes

  1. Plasma Essential Amino Acids (EAAs)

    Time frame: Baseline to 30, 60, 90, 120, 150, 180, 210, and 240 minutes post yogurt ingestion

    Postprandial plasma EAA concentrations (µmol/L) in response to skimmed and whole milk Greek yogurt intake.

  2. Cognition: Reaction Time, Alertness, and Selective Attention

    Time frame: Baseline to 1- and 4-hours post yogurt ingestion

    Determined from simple and choice reaction (reaction time and alertness) and the Stroop test (selective attention) (milliseconds; ms).

  3. Cognition: Updating

    Time frame: Baseline to 1- and 4-hours post yogurt ingestion

    Determined from the 2-back test (discriminatory ot targets; d').

Study contacts

Contact information is provided by the study sponsor or research team.

David D. Church, PhD

CONTACT

[email protected]

501-526-5769

Joseph J Matthews, PhD

CONTACT

[email protected]

501-526-5707

Sponsors and collaborators

Lead sponsor

University of Arkansas

Other

Collaborators

  • National Dairy Council

Registry information

Important dates

Study start
2026
Primary completion
2028
Study completion
2029
First posted
Jul 15, 2026
Registry last updated
Jul 30, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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