Why does the caffeine in coffee make us need to use the restroom, but the caffeine in soda doesn’t, despite being around the same amount of stimulant?

Question

Edit: I do not usually drink colas, I prefer clear sodas.

Mountain Dew is my favorite. When I think of having a Mountain Dew, I usually think of the 20 oz bottles. I don’t keep soda cans in the fridge.

When I have coffee I usually have the normal 12 oz over ice.

12 oz of coffee is more or less 100 mgs of caffeine. 20 oz of Mountain Dew is more or less 100 mgs of caffeine. This is why I said, “about the same amount of caffiene,” in my title.

I understand the confusion, and appreciate y’all caring enough to try and correct me in the comments. Hopefully this cleared some things up!

In: 127

Answer 1

You’re making an assumption that it’s the caffeine that makes you want “make a deposit”.
Though caffeine was originally thought to be the primary factor, the fact that decaf also makes you want to poop means its not the caffeine.

Chlorogenic acids and N-alkanoyl-5-hydroxytryptamides are now the prime candidates which is why Coffee, even Decaf makes you want to poop but sodas do not.