Hajek, A., Gyasi, R. M., Pengpid, S., Peltzer, K., Kostev, K., Soysal, P., Kotwal, A., Smith, L., Yon, D. K., König, H. (2026). Association of mainly vegetarian and vegan diets with loneliness, social isolation and social withdrawal in a German population survey. PLoS ONE. https://doi.org/10.1371/journal.pone.0353869