Rockstar Pure Zero vs Alani Nu: which has more caffeine?

Rockstar Pure Zero carries more total caffeine per serving (240mg per 16 oz can vs 200mg per 12 oz can), but ounce for ounce Alani Nu is actually the stronger drink at about 17mg per fluid ounce against 15. Which one "has more caffeine" depends on whether you measure the container or the concentration.

Rockstar Pure Zero vs Alani Nu: the numbers

Sources: Rockstar Pure Zero's figure is verified in our Rockstar Pure Zero caffeine guide against Caffeine Informer (source); Alani Nu's figure is verified in our Alani Nu guide against Alani Nu label (source).

Which one should you pick?

Pick Alani Nu when you want the lighter dose or a slower ramp, and Rockstar Pure Zero 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

• Rockstar Pure Zero: the full caffeine guide
• Alani Nu: the full caffeine guide
• The verified caffeine database
• Every drink compared: the comparisons index
• Compare any two of 120+ drinks

FAQ

Does Rockstar Pure Zero or Alani Nu have more caffeine? Rockstar Pure Zero: 240mg per 16 oz can versus 200mg per 12 oz can for Alani Nu.

Which is stronger per ounce? Alani Nu, at about 16.7mg per fluid ounce versus 15.0mg for Rockstar Pure Zero.