Plant-rich diets can make it difficult to obtain sufficient L-tyrosine.

“The point I want to make is your health is important. So if you are purely plant-based and you're eating a lot of cruciferous vegetables, make sure you're getting enough iodine. It does seem like the cruciferous vegetables can increase the need for further iodine. And same thing if you're purely on this all-meat diet or your keto, and you're not ingesting many vegetables. So I always thought that the cleaner the diet, the better, but it turns and probably that's true from the standpoint of, you know, hormone regulation, you know, estrogen”