If you're in an area which used a lot of lead paint in the past, be aware that free range chickens can move that soil lead into their eggs: https://now.tufts.ed

If you're in an area which used a lot of lead paint in the past, be aware that free range chickens can move that soil lead into their eggs: https://now.tufts.edu/2019/05/29/backyard-chickens-and-risk-lead-exposure https://now.tufts.edu/2019/05/29/backyard-chickens-and-risk-... Seems this kind of invisible contextual factor could dilute studies on "health".