Is eating burgers unhealthy?

I'm curious, could you elaborate on the potential health risks associated with regularly consuming burgers? Do they contain high levels of unhealthy fats, sodium, or preservatives that could negatively impact our diets? Are there any specific nutritional concerns that we should be aware of when it comes to burgers, and if so, are there any healthier alternatives we could consider? Additionally, what role does portion size play in determining the overall healthfulness of a burger, and how can we make informed decisions about incorporating them into our diets?