An interventional study of Whey protein and Dietary Supplement: Whey Protein With Adaptogenic Blend in Sports Nutritional Sciences, Sports Nutrition and Recovery, sponsored by Sports Performance and Applied Research in Trials and Analysis. Recruiting at 1 site in United Kingdom. Open to male participants aged 18 Years to 45 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2026-07-22.
Sponsored by Sports Performance and Applied Research in Trials and Analysis · Not applicable, Interventional, and Basic science
The goal of this clinical trial is to learn whether whey protein, with or without an adaptogenic herb blend, can improve strength, recovery, stress, and wellbeing in active males. The adaptogenic blend contains 600mg ashwagandha root extract.The main questions the study aims to answer are:
Does whey protein improve muscle strength and recovery in physically active males? Does adding ashwagandha to whey protein further improve stress, recovery, sleep, and wellbeing compared with protein alone? Are there differences between whey protein when combined with the adaptogenic blend?
Researchers will compare two supplement groups:
Participants will:
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Exclusion Criteria:
Participants will consume a whey protein supplement daily for 6 weeks. Assessments of muscle strength, recovery, stress, wellbeing, dietary intake, and salivary biomarkers will be conducted at baseline and post-intervention.
Dietary Supplement: Whey protein
Participants will consume a whey protein supplement containing ashwagandha KSM-66® (600 mg) for 6 weeks. Assessments will be conducted at baseline and post-intervention.
Dietary Supplement: Dietary Supplement: Whey Protein With Adaptogenic Blend
Participants will consume a whey protein supplement for 6 weeks. The supplement will be provided in identical blank tubs. Participants will be instructed to maintain their usual diet and training habits throughout the intervention period.
Also known as: Grass-Fed Whey Protein, Whey Protein Powder
Participants will consume a whey protein supplement containing ashwagandha KSM-66® root extract (600 mg) for 6 weeks. Supplements will be provided in identical blank tubs. Participants will maintain usual diet and training habits during the study.
Also known as: Whey Protein Plus Adaptogens, Ashwagandha Whey Protein
Salivary Cortisol Concentration
Change in salivary cortisol concentration from baseline to post-intervention following 6 weeks of whey protein supplementation with or without an adaptogenic herb blend containing ashwagandha KSM-66®. Results will be reported in ng/mL.
Time frame: Time Frame: Baseline and Week 6
Handgrip Strength
Change in maximal handgrip strength measured using a CAMRY dynamometer from baseline to post-intervention.
Time frame: Time Frame: Baseline and Week 6
Upper Body Muscular Endurance
Change in upper body muscular endurance assessed using the 90-degree push-up test protocol from baseline to post-intervention.
Time frame: Time Frame: Baseline and Week 6
Perceived Recovery and Wellbeing
Participants will complete the Hooper Index Questionnaire, which assesses four domains: sleep quality, fatigue, stress, and muscle soreness. Each domain is rated on a 10-point Likert scale ranging from 1 to 10, with total scores ranging from 4 to 40. Higher scores indicate poorer wellbeing and recovery status, whereas lower scores indicate better perceived wellbeing and recovery.
Time frame: Time Frame: Baseline and Week 6
Salivary DHEA-S Concentration
Salivary DHEA-S concentration will be measured from saliva samples using enzyme-linked immunosorbent assay (ELISA) techniques. Results will be reported in ng/mL.
Time frame: Time Frame: Baseline and Week 6
Dietary Intake
Dietary intake assessed using a 24-hour dietary recall to evaluate habitual nutritional intake during the study period.
Time frame: Time Frame: Baseline and Week 6
Salivary Testosterone Concentration
Salivary testosterone concentration will be measured from saliva samples using ELISA. Results will be reported in pg/mL.
Time frame: Time Frame: Baseline and Week 6
Salivary Secretory Immunoglobulin A (sIgA) Concentration
Salivary secretory immunoglobulin A (sIgA) concentration will be measured from saliva samples using ELISA. Results will be reported in µg/mL.
Time frame: Time Frame: Baseline and Week 6
Salivary C-reactive Protein Concentration
Salivary C-reactive protein will be measured from saliva samples using ELISA. Results will be reported in pg/mL.
Time frame: Time Frame: Baseline to Week 6
Plan to share: No — Individual participant data (IPD) will not be shared with other researchers. Data collected in this study will be anonymised and retained only for the duration of analysis before permanent deletion, in accordance with the study protocol, participant consent, and UK GDPR requirements.
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Sports Performance and Applied Research in Trials and Analysis