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Head-to-head evidence comparison — which supplement is right for you?
Collagen 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
7 of 7 studies with measurable effects showed benefit.
Top outcomes
Topical: apply gel as needed. Oral: ~50-100mg inner-leaf extract or ~30-50ml decolorized juice daily
any
Topical inner-leaf gel; decolorized inner-leaf for oral use
10-15g
Any time of day, With vitamin C for enhanced synthesis
Hydrolyzed collagen peptides (powder)
1-4 weeks
2-4 weeks
Hours
8-12 weeks
8-12 weeks
12 weeks
First week
Second-Degree Burns and Aloe Vera: A Meta-analysis and Systematic Review.
Advances in skin & wound care (2022) · Meta analysis
Faster burn wound healing vs control
Efficacy and safety of Aloe vera syrup for the treatment of gastroesophageal reflux disease: a pilot randomized positive-controlled trial.
Journal of traditional Chinese medicine = Chung i tsa chih ying wen pan (2015) · Rct
Reduced reflux/heartburn symptom frequency
The Effect of Aloe vera on the Healing of Diabetic Foot Ulcer: A Randomized, Double-blind Clinical Trial.
Current drug discovery technologies (2024) · Rct
Improved ulcer healing vs control
Effects of Collagen Supplements on Skin Aging: A Systematic Review and Meta-Analysis
The American Journal of Medicine (2025) · Meta analysis · n=1474
23 RCTs with 1474 participants
Effect of collagen supplementation on knee osteoarthritis: an updated systematic review and meta-analysis of randomised controlled trials
Clinical and experimental rheumatology (2025) · Meta analysis · n=870
The meta-analysis revealed an overall significant improvement of both function [MD, -6.46 (95% CI -9.52, -3.40); I2=75%; p=0.00001] and pain scores [MD, -13.63 (95% CI -20.67, -6.58); I2=88%; p=0.00001], favouring collagen supplementation.
Impact of Collagen Peptide Supplementation in Combination with Long-Term Physical Training on Strength, Musculotendinous Remodeling, Functional Recovery, and Body Composition in Healthy Adults: A Systematic Review with Meta-analysis
Sports medicine (Auckland, N.Z.) (2024) · Meta analysis · n=768
This systematic review and meta-analysis represents the first comprehensive investigation into the effects of long-term CP supplementation combined with regular physical training on various aspects of musculoskeletal health in adults.
Meta-analysis of 23 RCTs (n=1474) showed high-quality studies had less effect than industry-funded studies. Benefits include improved skin elasticity and hydration. Hydrolyzed collagen peptides preferred for bioavailability.
AI-estimated from published studies. Interpret as directional guidance.
Collagen has a higher evidence score (9/10 vs 5.6/10) and wins in 3 of 3 categories.
For improve skin health, Collagen has a higher relevance score (85 vs 58).
No known interactions between Aloe Vera and Collagen have been documented in our database. However, always consult a healthcare provider before combining supplements.