Is pepperoni ok for Muslims?

Could you please clarify if pepperoni is considered permissible for Muslims to consume, taking into consideration any dietary restrictions or cultural norms that may be observed within the Islamic faith? Is there any specific ingredient in pepperoni that may conflict with Islamic dietary guidelines, such as pork or its derivatives? Additionally, are there any variations of pepperoni that are deemed suitable for Muslims, or is it a general rule of thumb to avoid it altogether?