Kirkland Energy Shot (Costco) vs Alani Nu: which has more caffeine?

Alani Nu carries more total caffeine per serving (200mg per 12 oz can vs 180mg per 2 oz shot), but ounce for ounce Kirkland Energy Shot (Costco) is actually the stronger drink at about 90mg per fluid ounce against 17. Which one "has more caffeine" depends on whether you measure the container or the concentration.

Kirkland Energy Shot (Costco) vs Alani Nu: the numbers

Sources: Kirkland Energy Shot (Costco)'s figure is verified in our Kirkland Energy Shot (Costco) caffeine guide against Caffeine Informer (source); Alani Nu's figure is verified in our Alani Nu guide against Alani Nu label (source).

The concentration gap is the striking part: Kirkland Energy Shot (Costco) packs roughly 5 times the caffeine per ounce. Sipping speed matters at that density; a 2 oz shot finished in minutes hits differently than the same milligrams spread over a slow cup.

Which one should you pick?

Pick Kirkland Energy Shot (Costco) 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

• Kirkland Energy Shot (Costco): 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 Kirkland Energy Shot (Costco) or Alani Nu have more caffeine? Alani Nu: 200mg per 12 oz can versus 180mg per 2 oz shot for Kirkland Energy Shot (Costco).

Which is stronger per ounce? Kirkland Energy Shot (Costco), at about 90.0mg per fluid ounce versus 16.7mg for Alani Nu.