One study in 1996 found that consuming caffeine with creatine counteracts the benefits of the latter, but the study wasn't well-designed, and other studies have found no deleterious effect.
Otu nnyocha na 1996 gosiri na-ewe caffeine na creatine mee ka uru nke ikpeazụ, ma na-amụ ihe e ọma-e, na ndị ọzọ ọmụmụ adịghị deleterious mmetụta.