Collagen Peptides and Silicon
Each entry’s own grades, side by side. A grade says how strong the evidence is for one outcome — it does not rank one entry over the other.
Compound or practice
Collagen Peptides
Real, if modest, evidence for tendon, joint, and skin outcomes when taken with vitamin C before loading — better than its hype suggested a decade ago.
Grade B3 graded outcomesrevised Jul 10, 2026
A structured monograph in Prometheus's bundled library. Its grades are the monograph's own reading of the evidence, not a peer-reviewed review.
Compound or practice
Silicon
A trace element with modest bone and hair/skin/nail signals via collagen support.
Grade C2 graded outcomesrevised Jul 10, 2026
A structured monograph in Prometheus's bundled library. Its grades are the monograph's own reading of the evidence, not a peer-reviewed review.
Graded in both
Outcomes are matched by name. Two entries can describe the same outcome in different words, so one listed further down may still be graded in the other.
No outcome has the same name in both entries. They may still overlap under different wording — read the two lists below.
Graded only in Collagen Peptides
- Joint pain / osteoarthritis Small effectEvidence grade B
- Tendon / ligament Small effectEvidence grade C
- Skin elasticity Small effectEvidence grade B
Graded only in Silicon
- Bone-mineral density Small effectEvidence grade C
- Hair/skin/nails Small effectEvidence grade C
Conditions
Only in Collagen Peptides
- Osteoarthritis May improveEvidence grade B
Only in Silicon
None.
What each entry says about the other
- Silicon’s entry · Works together: Both support connective-tissue synthesis.
- Silicon’s entry · Goes with: Both support connective-tissue synthesis.
Both columns are read from the entries as they stand in this library. A comparison is not advice to take either one, and it is no substitute for a clinician who knows the person.