NCT07488273

Whey Protein Supplementation and Serum Mineral Status in Elite Endurance and Power Athletes

Whey Protein Supplementation and Serum Mineral Status in Elite Endurance and Power Athletes: A Two-Month Non-Randomized Open-Label Intervention Study

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 59 (actual)
• Sponsor: Monira Aldhahi · Academic / Other
• Sex: All
• Age: 18 Years – 30 Years
• Healthy volunteers: Accepted

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.

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

Interventions

Type	Name	Description
DIETARY_SUPPLEMENT	Whey Protein Supplementation	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.
OTHER	No Supplement (Control)	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.

Timeline

• Start date: 2026-02-25
• Primary completion: 2026-02-26
• Completion: 2026-03-15
• First posted: 2026-03-23
• Last updated: 2026-03-24

Locations

1 site across 1 country: Tunisia