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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
Investigational — NO approved monotherapy dose. Phase-2 trials used once-weekly subcutaneous injection with stepwise escalation up to 4.5 mg maintenance. There is no approved standalone regimen; do not self-dose an unapproved drug.
once-weekly
Once-weekly subcutaneous injection (investigational only)
20-40g per serving
Post-workout (within 2 hours), Morning, Between meals
Whey Protein Isolate
Over 26 weeks
Over 20-32 weeks
By 32 weeks
Especially during dose escalation
4-8 weeks
24-48 hours post-workout
Immediate
Within hours of consumption
Once-weekly cagrilintide for weight management in people with overweight and obesity: a multicentre, randomised, double-blind, placebo-controlled and active-controlled, dose-finding phase 2 trial.
Lancet (2021) · Rct · n=706
Phase-2, double-blind, randomised, placebo- and active-controlled dose-finding trial across 57 sites in ten countries; 706 adults with overweight/obesity (no diabetes) on once-weekly subcutaneous cagrilintide 0.3-4.5 mg vs liraglutide 3.0 mg vs placebo over 26 weeks
Safety, tolerability, pharmacokinetics, and pharmacodynamics of concomitant administration of multiple doses of cagrilintide with semaglutide 2·4 mg for weight management: a randomised, controlled, phase 1b trial.
Lancet (2021) · Rct · n=95
Phase-1b, randomised, placebo-controlled, multiple-ascending-dose trial in 95 treated adults with overweight/obesity; once-weekly subcutaneous cagrilintide 0.16-4.5 mg co-administered with semaglutide 2.4 mg over 20 weeks
Efficacy and safety of co-administered once-weekly cagrilintide 2·4 mg with once-weekly semaglutide 2·4 mg in type 2 diabetes: a multicentre, randomised, double-blind, active-controlled, phase 2 trial.
Lancet (2023) · Rct · n=92
Phase-2, double-blind, active-controlled trial in 92 adults with type 2 diabetes on metformin ± SGLT2 inhibitor; once-weekly CagriSema vs semaglutide vs cagrilintide (all escalated to 2.4 mg) over 32 weeks
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 5/10) and wins in 3 of 3 categories.
No known interactions between Cagrilintide and Whey Protein have been documented in our database. However, always consult a healthcare provider before combining supplements.