Kirkland Energy Shot (Costco) vs Tweaker energy shot: which has more caffeine?

Tweaker energy shot has more caffeine than Kirkland Energy Shot (Costco): 275mg vs 180mg in the same 2 oz shot. That is a 95mg gap, and since the shots match, the per-serving number is the whole story.

Kirkland Energy Shot (Costco) vs Tweaker energy shot: the numbers

Sources: Kirkland Energy Shot (Costco)'s figure is verified in our Kirkland Energy Shot (Costco) caffeine guide against Caffeine Informer (source); Tweaker energy shot's figure is verified in our Tweaker energy shot guide against Caffeine Informer (source).

Which one should you pick?

Pick Kirkland Energy Shot (Costco) when you want the lighter dose or a slower ramp, and Tweaker energy shot 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
• Tweaker energy shot: 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 Tweaker energy shot have more caffeine? Tweaker energy shot: 275mg per 2 oz shot versus 180mg per 2 oz shot for Kirkland Energy Shot (Costco).

Which is stronger per ounce? Tweaker energy shot, at about 137.5mg per fluid ounce versus 90.0mg for Kirkland Energy Shot (Costco).