Athletic PerformanceNCT07488273
Whey Protein Supplementation and Serum Mineral Status in Elite Endurance and Power Athletes
A study testing Whey Protein Supplementation in people with Athletic Performance, run by Monira Aldhahi at 1 site in Tunisia.
Trial summary
This study investigates whether 8 weeks of post-training whey protein supplementation (30 g/day) affects serum mineral concentrations (calcium, phosphorus, magnesium, and iron) in elite endurance and power athletes during structured training. Read more about this study
- Who is it for?
- Ages 18 to 30 yearsHealthy volunteers can take part
- Conditions the study is for
- Athletic Performance
- What is being tested?
- Whey Protein Supplementation
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 59 participants
- Where
- 1 siteTunisia
- Study dates
- 25 Feb 2026to 15 Mar 2026
- Phase
- Interventional
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 30 years
- All sexes
- Healthy volunteers accepted
- Adult
Who may be able to join
- Male elite track-and-field athletes
- Age 18-30 years
- Engaged in structured training program
- No supplement use in past 3 months
Who cannot join
- Use of nutritional or mineral supplements
- Metabolic or musculoskeletal disorders
- Acute injury affecting performance
- Use of ergogenic aids (e.g., creatine, anabolic agents)
Trial locations and contacts
1 site in 1 country.
About this study
Official title: Whey Protein Supplementation and Serum Mineral Status in Elite Endurance and Power Athletes: A Two-Month Non-Randomized Open-Label Intervention Study
This study investigates whether 8 weeks of post-training whey protein supplementation (30 g/day) affects serum mineral concentrations (calcium, phosphorus, magnesium, and iron) in elite endurance and power athletes during structured training.
Read the detailed description
This is a 10-week non-randomized, open-label intervention study involving elite male track-and-field athletes aged 18-26 years. Participants are allocated into a whey protein supplementation group or a control group based on convenience allocation. The intervention consists of daily intake of 30 g whey protein following training sessions over 8 weeks. Blood samples are collected at baseline and post-intervention to assess serum calcium, phosphorus, magnesium, and iron levels. The study aims to differentiate supplementation effects from training-induced physiological changes.
- Conditions
- Athletic Performance
- Being tested
- Whey Protein Supplementation, No Supplement (Control)
- Keywords
- Athletic Performance, Mineral Homeostasis
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Whey Protein SupplementationDietary supplement
Also called Whey protein powder, IronMaxx 100% Whey Protein
Participants in the intervention group consumed 30 g/day of whey protein powder within 30 minutes after training sessions for 8 weeks as part of a structured training program. The supplement (IronMaxx®, 100% Whey Protein) primarily consisted of whey protein concentrate and provided approximately 24 g of protein per daily dose. The intervention was administered in an open-label manner without placebo control. Participants were instructed to maintain their habitual diet and refrain from using additional nutritional supplements during the study period.
No Supplement (Control)Other
Also called Usual training only
Participants continued their usual sport-specific training program for 8 weeks without receiving whey protein or any additional nutritional supplementation. They were instructed to maintain their habitual diet and avoid initiating any new supplements during the study period.
| Study group | Role | What they receive |
|---|---|---|
| Whey Protein Group (WG) | Experimental | Receives 30 g/day whey protein post-training for 8 weeks Receives: Dietary Supplement: Whey Protein Supplementation |
| Control Group (CG) | Other | Continues usual training without supplementation Receives: Other: No Supplement (Control) |
What is being measured
The primary outcome is the main question the study is designed to answer.
serum mineral concentrations (Calcium, Phosphorus, Magnesium, Iron)
Serum concentrations of calcium, phosphorus, magnesium, and iron will be measured using standardized enzymatic and colorimetric assays from venous blood samples collected at rest. Measurements will be performed at baseline and after the intervention to assess changes associated with training and whey protein supplementation in elite athletes.
Measured: Baseline (Week 1) and Post-Intervention (Week 10)
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted23 Mar 2026
- Study start25 Feb 2026
- Primary completion26 Feb 2026
- Study completion15 Mar 2026
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Athletic PerformanceStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Treatment
- Allocation
- Non-randomised
- Intervention model
- Parallel groups
- Model description
- Participants are divided into whey supplementation and control groups within endurance and power disciplines, with no randomization or blinding.
- Masking
- None (open label)
- Enrolment
- 59 participants (actual)
Sponsor and investigators
- Lead sponsor
- Monira Aldhahi
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor-investigator, Monira Aldhahi, Princess Nourah Bint Abdulrahman University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07488273
- Sponsor's protocol ID
- PNU-12
- Status last verified
- Mar 2026
- First submitted
- 17 Mar 2026
- Last updated
- 24 Mar 2026
- Results posted
- No
- Data monitoring committee
- Yes
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No
Study at a glance
From the registry record, last updated by the sponsor on 24 Mar 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Whey Protein Supplementation and Serum Mineral Status in Elite Endurance and Power Athletes: A Two-Month Non-Randomized Open-Label Intervention Study
- ClinicalTrials.gov ID
- NCT07488273
- Acronym / sponsor ID
- PNU-12
- Conditions
- Athletic Performance
- Keywords
- Athletic Performance, Mineral Homeostasis
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 59 participants (actual)
- Lead sponsor
- Monira AldhahiUniversity, hospital or other
- Study start
- 25 Feb 2026 (actual)
- Primary completion
- 26 Feb 2026 (actual)
- Study completion
- 15 Mar 2026 (actual)
- First posted
- 23 Mar 2026 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
This study investigates whether 8 weeks of post-training whey protein supplementation (30 g/day) affects serum mineral concentrations (calcium, phosphorus, magnesium, and iron) in elite endurance and power athletes during structured training.
Detailed description
This is a 10-week non-randomized, open-label intervention study involving elite male track-and-field athletes aged 18-26 years. Participants are allocated into a whey protein supplementation group or a control group based on convenience allocation. The intervention consists of daily intake of 30 g whey protein following training sessions over 8 weeks. Blood samples are collected at baseline and post-intervention to assess serum calcium, phosphorus, magnesium, and iron levels. The study aims to differentiate supplementation effects from training-induced physiological changes.
Study design
- Primary purpose
- Treatment
- Allocation
- Non-randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Number of arms
- 2
- Model description
- Participants are divided into whey supplementation and control groups within endurance and power disciplines, with no randomization or blinding.
| Arm | Type | Receives |
|---|---|---|
| Whey Protein Group (WG) | Experimental | Dietary Supplement: Whey Protein SupplementationReceives 30 g/day whey protein post-training for 8 weeks |
| Control Group (CG) | Other | Other: No Supplement (Control)Continues usual training without supplementation |
Who may qualify
- Ages
- 18 to 30 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult
Key inclusion criteria (4 listed)
- Male elite track-and-field athletes
- Age 18-30 years
- Engaged in structured training program
- No supplement use in past 3 months
Key exclusion criteria (4 listed)
- Use of nutritional or mineral supplements
- Metabolic or musculoskeletal disorders
- Acute injury affecting performance
- Use of ergogenic aids (e.g., creatine, anabolic agents)
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Whey Protein SupplementationAlso: Whey protein powder, IronMaxx 100% Whey ProteinParticipants in the intervention group consumed 30 g/day of whey protein powder within 30 minutes after training sessions for 8 weeks as part of a structured training program. The supplement (IronMaxx®, 100% Whey Protein) primarily consisted of whey protein concentrate and provided approximately 24 g of protein per daily dose. The intervention was administered in an open-label manner without placebo control. Participants were instructed to maintain their habitual diet and refrain from using additional nutritional supplements during the study period. | Dietary supplement | Whey Protein Group (WG) |
| No Supplement (Control)Also: Usual training onlyParticipants continued their usual sport-specific training program for 8 weeks without receiving whey protein or any additional nutritional supplementation. They were instructed to maintain their habitual diet and avoid initiating any new supplements during the study period. | Other | Control Group (CG) |
Primary outcome
serum mineral concentrations (Calcium, Phosphorus, Magnesium, Iron)
Time frame: Baseline (Week 1) and Post-Intervention (Week 10)
Serum concentrations of calcium, phosphorus, magnesium, and iron will be measured using standardized enzymatic and colorimetric assays from venous blood samples collected at rest. Measurements will be performed at baseline and after the intervention to assess changes associated with training and whey protein supplementation in elite athletes.
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 24 Mar 2026.
- Individual participant dataSharing planned: No
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Whey Protein Supplementation in people with Athletic Performance, run by Monira Aldhahi at 1 site in Tunisia.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 4 inclusion and 4 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 24 Mar 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Tunisia. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
serum mineral concentrations (Calcium, Phosphorus, Magnesium, Iron) (time frame: Baseline (Week 1) and Post-Intervention (Week 10)). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 24 Mar 2026.