Magnesium and Feverfew
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
Magnesium
A cofactor in 300+ reactions that a large fraction of adults under-consume — real, modest benefits for sleep, blood pressure, and migraine.
Grade B4 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
Feverfew
A migraine-prevention herb with modest, inconsistent trial support.
Grade C1 graded outcomerevised 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 Magnesium
- Correcting low status Moderate effectEvidence grade A
- Blood pressure Small effectEvidence grade B
- Migraine prophylaxis Moderate effectEvidence grade B
- Subjective sleep Small effectEvidence grade B
Graded only in Feverfew
- Migraine frequency Small effectEvidence grade C
Conditions
- MigraineMagnesium: May improveEvidence grade BFeverfew: May improveEvidence grade C
Only in Magnesium
- Hypertension May improveEvidence grade B
- Insomnia May improveEvidence grade C
Only in Feverfew
None.
What each entry says about the other
- Feverfew’s entry · Works together: Common migraine-prevention stack.
- Feverfew’s entry · Goes with: Common migraine-prevention 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.