Inclusion Criteria:

• Age 18 to 45 years inclusive
• Biological male
• Active competitive athlete in a recognized sport OR certified fitness professional (personal trainer, strength and conditioning coach, or equivalent)
• Minimum 3 structured resistance-training sessions per week for at least 1 year continuously
• Habitual protein intake 1.2 to 2.0 g/kg/day confirmed by 7-day food diary at screening
• Current creatine users willing to use study-provided creatine monohydrate 5 g/day; non-users willing not to initiate creatine during the trial
• Able to provide written informed consent in English
• Willing and able to attend all supervised training sessions and assessment visits for 10 weeks
• Access to a digital kitchen scale or willing to obtain one for food-record completion

Exclusion Criteria:

• Use of anabolic steroids, SARMs, prohormones, or beta-alanine supplements (other than the study product) within 8 weeks of screening
• Current use of any amino acid supplement or weight-gainer product not cleared by the research coordinator
• Currently in an active competitive season with non-negotiable training demands the investigator determines are incompatible with the supervised programme
• Musculoskeletal injury in the preceding 3 months affecting ability to perform study assessments or training
• Any medical condition, medication, or dietary restriction that in the Medical Officer's opinion would affect the safety or validity of participation
• Participation in another intervention study within 4 weeks of screening
• Unwillingness to standardize creatine intake per protocol (current users) or to abstain from initiating creatine (non-users)