Caffeine X Digestion

[Horse Fighter]

Hi guys! Recently i decided to introduce caffeine pills to my regimen, i take 400mg per day, but i'm having a digestion reaction after a stressful first week of caffeine, i'm passing a lot of greasy stools, sometimes my stools smells like amonia, but my fat intake is pretty low, it doesnt make sense, another reaction is my stools used to float, but now some sinks, some floats, what does that mean?