One option is to eat less of everything. This may sound dumb but in the current stone age understanding of nutrition and health, it is a reasonable option.

The only foods which are ‘definitely safe’ are leafy greens and cruciferous vegetables. Could probably add berries to that in moderation. Not saying that is all one should eat, what I mean is to eat less of everything else than baseline, to some caloric deficit. This excludes the few people who are underweight for whatever reason, and those with certain diseases.