Participation in the life of ISKCON is open to all, regardless of current dietary habits. Those who eat meat, fish, or eggs are welcome to visit temples, attend kirtan, hear philosophical lectures, read the literature, take part in festivals, and receive spiritual guidance. In this sense, the movement maintains an open door, inviting anyone with even a spark of interest in Krishna to come, observe, and participate in many aspects of devotional practice. This inclusive stance reflects an emphasis on gradual spiritual growth rather than immediate conformity.

At the same time, ISKCON maintains clear standards for those who wish to deepen their commitment and be recognized as practicing or initiated devotees. A key part of these standards is adherence to the four regulative principles, one of which is abstaining from meat, fish, and eggs, and thus following a lacto‑vegetarian diet. Observing this principle is considered essential for formal initiation and for being counted among serious practitioners within the tradition. Many who begin as non‑vegetarians gradually adopt vegetarianism as their faith and practice mature, allowing their outer habits to align more closely with the inner aspiration for Krishna consciousness.