What is the primary religious affiliation of Halal food?

Halal food refers to dietary guidelines that are based on Islamic law as set forth in the Quran. The term "halal" itself means "permissible" in Arabic, and these guidelines dictate what is allowed for Muslims to consume. The primary factor in halal food is the way animals are slaughtered; they must be treated humanely and slaughtered in the name of Allah.

Islam, being the religion that provides these dietary laws, fundamentally influences the preparation and consumption of halal food. This means that halal food is an integral part of Muslim culture and religious practice. Thus, in the context of the question, the primary religious affiliation of halal food is indeed Muslim.