I read and searched "protein" from the healthy diet, but didn't find any. It covered
- fruit and vegetables, legumes, nuts and whole grains
- sugar
- fats
- salt: 竟然推荐多达5g!!!, 美国医生一般建议2克(如果是钠, 就与5g食盐含钠相当)
https://www.who.int/news-room/fact-sheets/detail/healthy-diet