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Head-to-head evidence comparison — which supplement is right for you?
Whey Protein wins 3 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Mostly mechanism / observational
Top outcomes
Verdict
Likely helps
26 of 30 studies with measurable effects showed benefit.
Top outcomes
Prescription-only, clinician-directed. Subcutaneous. Byetta (twice-daily): 5 µg before two main meals, escalated to 10 µg after ~1 month. Bydureon (once-weekly extended-release): 2 mg subcutaneously once weekly. DO NOT self-dose.
any
Once-weekly extended-release injection (Bydureon)
20-40g per serving
Post-workout (within 2 hours), Morning, Between meals
Whey Protein Isolate
Weeks to months
Months
Years
Especially early / during dose escalation
4-8 weeks
24-48 hours post-workout
Immediate
Within hours of consumption
Effects of Once-Weekly Exenatide on Cardiovascular Outcomes in Type 2 Diabetes (EXSCEL).
N Engl J Med (2017) · Rct · n=14752
Large cardiovascular-outcomes RCT: 14,752 patients with type 2 diabetes (73.1% with prior cardiovascular disease), once-weekly exenatide 2 mg vs placebo added to usual care, median 3.2 years
Exenatide once weekly versus twice daily for the treatment of type 2 diabetes (DURATION-1): a randomised, open-label, non-inferiority study.
Lancet (2008) · Rct · n=295
30-week open-label RCT in 295 patients with type 2 diabetes comparing once-weekly extended-release exenatide 2 mg with 10 µg twice daily
Exenatide once weekly versus liraglutide once daily in patients with type 2 diabetes (DURATION-6): a randomised, open-label study.
Lancet (2013) · Rct · n=911
26-week head-to-head open-label RCT in 911 patients: once-weekly exenatide 2 mg vs once-daily liraglutide 1.8 mg added to oral therapy
Comparative Efficacy of Different Protein Supplements on Muscle Mass, Strength, and Physical Indices of Sarcopenia among Community-Dwelling, Hospitalized or Institutionalized Older Adults Undergoing Resistance Training: A Network Meta-Analysis of Randomized Controlled Trials
Nutrients (2024) · Meta analysis · n=5272
Treatment effects for main outcomes were expressed as standard mean difference (SMD) with 95% confidence interval (CI).
Effects of Whey Protein, Leucine, and Vitamin D Supplementation in Patients with Sarcopenia: A Systematic Review and Meta-Analysis
Nutrients (2023) · Meta analysis · n=637
However, appendicular muscle mass significantly improved in the experimental group compared to the control group.
A systematic review, meta-analysis and meta-regression of the effect of protein supplementation on resistance training-induced gains in muscle mass and strength
British Journal of Sports Medicine (2018) · Meta analysis · n=1863
Protein supplementation increases muscle mass gains
Based on multiple meta-analyses with >3000 participants. Effects require concurrent resistance training. Benefits plateau around 30-40g per serving. Isolate forms may reduce digestive issues.
AI-estimated from published studies. Interpret as directional guidance.
Whey Protein has a higher evidence score (9/10 vs 6/10) and wins in 3 of 3 categories.
No known interactions between Exenatide and Whey Protein have been documented in our database. However, always consult a healthcare provider before combining supplements.