Assessing the Impact of "Super-whey" vs. Isonitrogenous Whey on Muscle Protein Synthesis

NCT ID: NCT05701202

Last Updated: 2023-01-27

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: NA
• Total Enrollment: 20 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2021-06-15
• Study Completion Date: 2022-11-22

Brief Summary

Skeletal muscle accounts for approximately 45-55% of total body mass in healthy adults and plays a pivotal role in whole-body metabolic health, locomotion and physical independence. Undesirable loss of skeletal muscle mass (atrophy) is, however, a common feature of many diseases and scenarios including ageing, bed rest/immobilisation, cancer and physical inactivity. Despite the exact mechanisms causing muscle atrophy being not yet fully understood, "anabolic resistance" (reduced muscle building in response to protein feeding and exercise) is thought to be key, especially for age-related skeletal muscle losses (known as sarcopenia). As such, the search for optimal strategies (e.g., exercise and/ or nutritional interventions) to combat this anabolic blunting remains a hot-topic in scientific research.

Leucine, an essential and branched chain amino acid (EAA/BCAA), is thought to be the most potent AA for stimulating muscle protein synthesis (MPS; the muscle building process). Although, as a stand-alone supplement, leucine is unlikely to provoke a robust and prolonged state of MPS, low doses of leucine-enriched mixed-EAAs can elicit similar increases in MPS as compared to a large dose of whey protein. As reduced appetite and increased satiety (feeling fuller) are common with advancing age, supplementation of a low-dose protein (i.e., leucine-enriched) that can adequately stimulate MPS may contribute to muscle health maintenance in older adults and reduce satiation following a meal.

This study aims to examine whether a novel whey protein with greater leucine content ("super-whey") has superior muscle building properties compared to a regular whey protein, at rest and after a single bout of exercise, in both young and older adults

Conditions

Sarcopenia

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: CROSSOVER
• Primary Study Purpose: OTHER
• Blinding Strategy: DOUBLE

Study Groups

Super-Whey protein

Both protein sources will be given in doses that are considered low/normal, both in relation to recommended dietary advice and commercially available supplements. As such, no adverse reactions or side effects are expected through consumption of these supplementations

Group Type: EXPERIMENTAL

Super-Whey protein

Intervention Type: DIETARY_SUPPLEMENT

2 different protein supplements (as above) will be given in a randomised crossover fashion to participants

Isonitrogenous whey protein

Both protein sources will be given in doses that are considered low/normal, both in relation to recommended dietary advice and commercially available supplements. As such, no adverse reactions or side effects are expected through consumption of these supplementations

Group Type: ACTIVE_COMPARATOR

Isonitrogenous whey protein

Intervention Type: DIETARY_SUPPLEMENT

2 different protein supplements (as above) will be given in a randomised crossover fashion to participants

Interventions

Super-Whey protein

2 different protein supplements (as above) will be given in a randomised crossover fashion to participants

Intervention Type: DIETARY_SUPPLEMENT

Isonitrogenous whey protein

2 different protein supplements (as above) will be given in a randomised crossover fashion to participants

Intervention Type: DIETARY_SUPPLEMENT

Eligibility Criteria

Inclusion Criteria

• Participant is in the desired age-ranges (young adults: 18-35 years; older adults: 65+ years).
• Participant is willing and able to give informed consent for participation in the study.
• Participant is physically able to perform resistance exercise

Exclusion Criteria

• A BMI <18 or >35 kg/m2
• Active cardiovascular, cerebrovascular or respiratory disease: e.g. uncontrolled hypertension (BP > 160/100), angina, heart failure (class III/IV), arrhythmia, right to left cardiac shunt, recent cardiac event, COPD, pulmonary hypertension or recent (6 mo) stroke
• Any metabolic disease
• Clotting dysfunction
• A history of, or current neurological or musculoskeletal conditions (e.g. epilepsy)
• Lactose intolerance
• Having taken part in a research study in the last 3 months involving invasive procedures or an inconvenience allowance

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 85 Years
• Eligible Sex: MALE
• Accepts Healthy Volunteers: Yes

Sponsors

University of Nottingham

OTHER

Sponsor Role: lead

Responsible Party

Philip Atherton

Professor

Responsibility Role: PRINCIPAL_INVESTIGATOR

Principal Investigators

Philip Atherton, Prof

Role: PRINCIPAL_INVESTIGATOR

University of Nottingham

Locations

Centre of Ageing, Metabolism and Physiology

Derby, , United Kingdom

Countries

United Kingdom

Other Identifiers

ARLA-WHEY_PtA_CMMP

Identifier Type: -

Identifier Source: org_study_id