Boron and Tongkat Ali
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
Boron
A cheap ultra-trace mineral that nudges free testosterone, vitamin D, and inflammation markers — small, real, honest C.
Grade C3 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
Tongkat Ali
The testosterone-support herb with the least-bad evidence — modest free-T and stress signals, best in the stressed or older.
Grade C3 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.
| Outcome | Boron | Tongkat Ali |
|---|---|---|
| Free testosterone | Evidence grade CSmall effectmixedVia lower SHBG | Evidence grade CSmall effectmixedLarger in stressed/older |
Graded only in Boron
- Vitamin D status Small effectEvidence grade C
- Inflammatory markers Small effectEvidence grade C
Graded only in Tongkat Ali
- Stress / cortisol Small effectEvidence grade C
- Libido Small effectEvidence grade C
What each entry says about the other
- Boron’s entry · Works together: Common free-testosterone support stack.
- Boron’s entry · Goes with: Common free-testosterone support stack.
- Tongkat Ali’s entry · Works together: Common free-testosterone support stack.
- Tongkat Ali’s entry · Goes with: Common free-testosterone support stack.
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.