We should keep in mind that these tips are specifically chosen because of their unusual and laughable nature, and so should refrain from attempting to generalize about the nature of medieval medicine from a biased dataset.
Someone else recently posted about the Templar diet[1], and I thought that was actually quite ahead of it's time. What I find most interesting is how they could have been so ahead of the times in terms of diet and hygiene compared to the "average Joe".
[1] https://www.atlasobscura.com/articles/what-the-templar-knigh...