Does Cold Brew Coffee Have More Caffeine?

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Caffeine content is not a constant thing when you brew at home. Caffeine content in store bought products vary quite a bit from brand to brand. When you make a concentrate, you use a lot more coffee than you would for a hot cup so as a concentrate, yes the caffeine is going to be higher. When you dilute it down to drink, you get back down into the range of hot coffee. In short, it depends.