Starbucks London Fog vs Arizona Green Tea: which has more caffeine?

Starbucks London Fog has more caffeine than Arizona Green Tea on both counts: 40mg per 16 oz grande (40mg at every size) against 7.5mg per 8 oz serving (23 oz can holds ~21.5mg), and about 2mg per fluid ounce against 1. The serving sizes differ, so the table below shows both ways of counting.

Starbucks London Fog vs Arizona Green Tea: the numbers

Sources: Starbucks London Fog's figure is verified in our Starbucks London Fog caffeine guide against Starbucks nutrition listing (source); Arizona Green Tea's figure is verified in our Arizona Green Tea guide against Arizona published figure / Caffeine Informer (source).

Which one should you pick?

Pick Arizona Green Tea when you want the lighter dose or a slower ramp, and Starbucks London Fog 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

• Starbucks London Fog: the full caffeine guide
• Arizona Green Tea: the full caffeine guide
• The verified caffeine database

FAQ

Does Starbucks London Fog or Arizona Green Tea have more caffeine? Starbucks London Fog: 40mg per 16 oz grande (40mg at every size) versus 7.5mg per 8 oz serving (23 oz can holds ~21.5mg) for Arizona Green Tea.

Which is stronger per ounce? Starbucks London Fog, at about 2.5mg per fluid ounce versus 0.9mg for Arizona Green Tea.