Head to head
Caffeine vs Vitamin B12
On the strength of human evidence, Caffeine comes out ahead (evidence 88 vs 55). But they're often used for different things — read each claim before deciding.
Caffeine
Strongthe legal performance drug
Marketing intensity 60 of 100. Evidence strength 88 of 100. Verdict: Better than its hype.
One of the most reliably effective legal performance aids. The catch isn't whether it works - it's timing.
Full evidence on Caffeine →Vitamin B12
Moderatean energy fix only if you're actually low
Marketing intensity 75 of 100. Evidence strength 55 of 100. Verdict: Slightly overhyped.
Essential and genuinely energising if you're deficient. The 'B12 for energy' shots and gummies do nothing measurable if your levels are already normal.
Full evidence on Vitamin B12 →Side by side
| Metric | Caffeine | Vitamin B12 |
|---|---|---|
| Overall tier | Strong | Moderate |
| Evidence score | 88/100 | 55/100 |
| Hype score | 60/100 | 75/100 |
| Verdict | Better than its hype | Slightly overhyped |
| Safety concern | moderate | low |
Quick answers
Caffeine or Vitamin B12 — which has better evidence?
On the strength of human evidence, Caffeine comes out ahead (evidence 88 vs 55). But they're often used for different things — read each claim before deciding.
Can you take Caffeine and Vitamin B12 together?
This page compares the evidence, not interactions. Some supplements interact with each other or with medications — check each one's safety section and talk to a pharmacist before stacking.