It’s easy to buy the same meats all the time. Maybe some chicken, some ground beef, some steak or pork. Mix things up a bit and seek out some bison. And if you know any hunters, get some wild game such as deer and elk. All of those meats are very nutritious and they’re also really good environmentally. Regulations and industry standards don’t allow the use of hormones and antibiotics that are used in the raising of many cattle. But just like beef, you have to search for grass-fed bison. Sadly, there are grain finished, feedlot bison.
And of course wild game is, well.. wild! You can’t get more natural than that.