Weston Price's research indicated that animal foods, particularly their fat-soluble vitamins, are crucial for good dentition and preventing dental arch problems.

“he said what did all of these cultures where i saw optimal health what did they all have in common right there were two things number one there weren't any vegetarian or vegan cultures they all consumed as great a variety of animal source foods as were available to them everyone he looked for a vegan culture he tried to find one he couldn't find him he was disappointed but the other the second thing and the thing that kind of gobsmacked me was that in every single instance where there was in his view optimal health the most important food the most venerated food the most sought after food the most sacred food was were those foods that were highest in fat animal fat and fat soluble nutrients”

“he had traveled the world i think early 1900s looking at all these hunter-gatherers and then also just people living on traditional agricultural life you know in their traditional agricultural lifestyle and he just sort of showed like hey i saw animal food was a very important part and he showed that without some of those fat soluble vitamins and animal foods you know we don't get good dentition we have problems with our dental arch”