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Comparing High-Protein and Low-Protein Multi-Ingredient Supplements for Body Composition and Performance in Elite Rugby Players

NCT07569770 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 20

Last updated 2026-05-13

No results posted yet for this study

Summary

The purpose of this 12-week study is to compare the effects of two different post-exercise nutritional supplements on the body composition and exercise performance of elite male university rugby players. Athletes often consume very high amounts of protein to build muscle and recover, but excessive protein intake might pose potential health risks.

Study Hypothesis:

The researchers hypothesize that a multi-ingredient supplement with a lower total protein content (about 20 grams) will yield comparable or even superior improvements in body composition and physical performance compared to a standard high-dose whey protein supplement (40 grams).

Study Design:

Twenty elite male college rugby players will be randomly divided into two equal groups. One group will receive the high-dose whey protein, while the other group will receive the lower-dose multi-ingredient supplement (which includes protein, leucine, creatine, red amaranth, and elderberry). Participants will consume their assigned supplement immediately after their training sessions, four times a week for 12 weeks.

Assessments:

Before and after the 12-week intervention, the researchers will measure the participants' body composition (muscle and fat mass), maximum muscle strength, power, agility, and aerobic endurance. The overall goal is to determine if athletes can achieve optimal performance and muscle growth with a lower, more efficient protein intake strategy.

Conditions

  • Athletic Performance
  • Body Composition
  • Whey Protein
  • Protein

Interventions

DIETARY_SUPPLEMENT

Whey Protein Concentrate

Participants consume 40 g of Whey Protein Concentrate (WPC-80), providing 166 kcal, 32 g of protein, 5 g of carbohydrate, and 2 g of fat per serving. It is consumed immediately after training, four times per week for 12 weeks.

DIETARY_SUPPLEMENT

Single Formulated Multi-Ingredient Supplement

Participants consume a single, pre-mixed formulated supplement powder containing approximately 20 g of protein (whey protein fortified with additional leucine and glycine), 30 g of carbohydrates, creatine, red amaranth extract, and elderberry extract (169 kcal). It is consumed immediately after training, four times per week for 12 weeks.

Sponsors & Collaborators

  • University of Taipei

    lead OTHER

Study Design

Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Model
PARALLEL

Eligibility

Min Age
19 Years
Max Age
26 Years
Sex
MALE
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2023-11-30
Primary Completion
2024-03-30
Completion
2024-07-30

Countries

  • Taiwan

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT07569770 on ClinicalTrials.gov