Supplements for focus & attention and Caffeine
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.
Goal guide
Supplements for focus & attention
18 compounds relevant to focus & attention, ranked by overall evidence grade.
Grade A18 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
Caffeine
The most-used and best-evidenced cognitive and physical stimulant on earth — precise dosing and a hard afternoon cutoff are the whole skill.
Grade A4 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 Supplements for focus & attention
- Caffeine Unclear effectEvidence grade A
- L-Theanine Unclear effectEvidence grade B
- Bacopa Monnieri Unclear effectEvidence grade B
- Butterbur Unclear effectEvidence grade B
- L-Tyrosine Unclear effectEvidence grade C
- Ginkgo Biloba Unclear effectEvidence grade C
- Lion's Mane Unclear effectEvidence grade C
- Citicoline (CDP-Choline) Unclear effectEvidence grade C
- Alpha-GPC Unclear effectEvidence grade C
- Phosphatidylserine Unclear effectEvidence grade C
- Feverfew Unclear effectEvidence grade C
- Huperzine A Unclear effectEvidence grade C
- Mucuna Pruriens (L-Dopa) Unclear effectEvidence grade C
- Sage Unclear effectEvidence grade C
- Theacrine (TeaCrine) Unclear effectEvidence grade C
- GABA (Supplement) Unclear effectEvidence grade D
- Vinpocetine Unclear effectEvidence grade D
- Pramiracetam Unclear effectEvidence grade D
Graded only in Caffeine
- Alertness / reaction time Moderate effectEvidence grade A
- Endurance performance Moderate effectEvidence grade A
- Strength / power Small effectEvidence grade B
- Sleep (afternoon dosing) Moderate effectEvidence grade A
What each entry says about the other
- Supplements for focus & attention’s entry · Goes with: Grade A
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.