Caffeine: side effects, safety & interactions and Iron
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.
Safety
Caffeine: side effects, safety & interactions
Safe for most in moderation; excess causes anxiety, palpitations, and insomnia. Dependence and withdrawal (headache, fat
Grade A0 graded outcomesrevised Jul 10, 2026
Assembled by the app from other entries in this library. It adds no evidence of its own — follow the links to the entries it draws on.
Compound or practice
Iron
Only supplement it against a ferritin number — transformative in deficiency, pro-oxidant and constipating in excess.
Grade A3 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 Caffeine: side effects, safety & interactions
None — every outcome it grades is graded in both.
Graded only in Iron
- Iron-deficiency anemia Large effectEvidence grade A
- Fatigue with low ferritin (non-anemic) Moderate effectEvidence grade B
- Restless legs syndrome Moderate effectEvidence grade B
What each entry says about the other
- Caffeine: side effects, safety & interactions’s entry · Watch with: Cuts non-heme iron absorption ~40% — separate by 2 hours.
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.