This raises the interesting point of finding a balance between knowing/searching and letting go when it comes to health. Lead is a major one but obession about health can lead to anxiety, stress. I think that finding the major factors that affect health is what matters (sunlight, sleep, walking, cooking with stainless steel, etc.) and letting go of all the minor details. This is an issue that has been close to my heart for years, and my perspective on it has changed over time. Anxiety can be a real problem.