Celsius has the most caffeine of the three: 200mg per 12 oz can, against 200mg per 12 oz can for Alani Nu and 200mg per 16 oz can for Ghost Energy. It also leads per ounce, at roughly 16.7mg to 12.5mg, so the order holds whichever way you count.
Celsius vs Alani Nu vs Ghost Energy: the numbers
| Celsius | Alani Nu | Ghost Energy | |
|---|---|---|---|
| Caffeine per serving | 200mg per 12 oz can | 200mg per 12 oz can | 200mg per 16 oz can |
| Caffeine per fl oz | 16.7mg | 16.7mg | 12.5mg |
| Servings to reach 400mg (FDA context) | 2.0 | 2.0 | 2.0 |
Sources: Celsius is 200mg per 12 oz can per Caffeine Informer (source), and the figure is carried in our Celsius guide; Alani Nu is 200mg per 12 oz can per Caffeine Informer (source), and the figure is carried in our Alani Nu guide; Ghost Energy is 200mg per 16 oz can per Caffeine Informer (source), and the figure is carried in our Ghost Energy guide.
Per can or per ounce: pick the number that matches how you drink
The serving sizes here are different, so the two rankings answer different questions. Per serving tells you what one purchase delivers. Per fluid ounce tells you how concentrated each sip is, which is what matters if you nurse a large one slowly or split a can. Celsius is the densest of the three at about 16.7mg per ounce; Ghost Energy is the lightest at 12.5mg.
The three head-to-head pages
Each pairing has its own page with the full math:
- Celsius vs Alani Nu, head to head
- Celsius vs Ghost Energy, head to head
- Alani Nu vs Ghost Energy, head to head
Which one should you pick?
Take Ghost Energy when you want the smallest dose of the three, Alani Nu when you want a middle number without thinking about it, and Celsius when you actually want the 200mg and know how you handle it. If you drink more than one caffeinated thing a day, the useful move is adding the day up against the 400mg reference rather than judging each drink alone.
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
- The verified caffeine database
- Every drink compared: the comparisons index
- Compare any two of 120+ drinks
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FAQ
Which has the most caffeine, Celsius, Alani Nu or Ghost Energy? Celsius, at 200mg per 12 oz can. Alani Nu has 200mg per 12 oz can and Ghost Energy has 200mg per 16 oz can.
Which of the three is strongest per ounce? Celsius, at about 16.7mg per fluid ounce, ahead of Alani Nu at 16.7mg and Ghost Energy at 12.5mg.
How many Celsius servings reach the FDA 400mg reference? About 2.0 of them, at 12 oz can each. The FDA cites 400mg a day as an amount generally not associated with negative effects in healthy adults. This is information, not advice.
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