Alani Nu has more caffeine than Mello Yello: 200mg vs 51mg in the same 12 oz can. That is a 149mg gap, and since the cans match, the per-serving number is the whole story.
These are different categories of drink, which changes how the caffeine arrives. Energy drinks and sodas list an exact number because caffeine is a measured additive; brewed drinks vary with the beans and the brew, so their figures are compiled averages. The numbers here are the standard published values for each.
Alani Nu vs Mello Yello: the numbers
| Alani Nu | Mello Yello | |
|---|---|---|
| Caffeine per serving | 200mg per 12 oz can | 51mg per 12 oz can |
| Caffeine per fl oz | 16.7mg | 4.2mg |
| Servings to reach 400mg (FDA context) | 2.0 | 7.8 |
Sources: Alani Nu's figure is verified in our Alani Nu caffeine guide against Alani Nu label (source); Mello Yello's figure is verified in our Mello Yello guide against Caffeine Informer (source).
The concentration gap is the striking part: Alani Nu packs roughly 4 times the caffeine per ounce. Sipping speed matters at that density; a 12 oz can finished in minutes hits differently than the same milligrams spread over a slow cup.
Which one should you pick?
Pick Mello Yello when you want the lighter dose or a slower ramp, and Alani Nu when you actually need the bigger hit and know your tolerance. If you are stacking either with other caffeinated drinks through the day, run the math against the 400mg reference rather than guessing.
For context, the FDA cites 400mg of caffeine a day as an amount generally not associated with negative effects in healthy adults. Tolerance and health vary, so treat these numbers as information, not advice.
Related reading
- Alani Nu: the full caffeine guide
- Mello Yello: the full caffeine guide
- The verified caffeine database
- Every drink compared: the comparisons index
FAQ
Does Alani Nu or Mello Yello have more caffeine? Alani Nu: 200mg per 12 oz can versus 51mg per 12 oz can for Mello Yello.
Which is stronger per ounce? Alani Nu, at about 16.7mg per fluid ounce versus 4.2mg for Mello Yello.
Comparing caffeine? The caffeine comparison tool puts hundreds of drinks side by side, and the caffeine curfew calculator can check your cutoff time for tonight.