Parents necessarily experiment on their children. No one knows "the proper way" to raise children and if you trust psychologists, nutritionists, or the social

Parents necessarily experiment on their children. No one knows "the proper way" to raise children and if you trust psychologists, nutritionists, or the social sciences to "scientifically" tell you how to raise your child, I think you're far too credulous. If a child's health is determined to be in danger and the medical authorities determine that the cause is dietary in nature and the parents refuse to address it, then rectify the problem using force. But the way to handle these things is on a case-by-case basis. Codifying this stuff in law (or making it "formal" in any way) is a mistake because abuse is defined by norms, not what a plurality of psychologists or nutrionists happen to think right now. We can't stop parents from fucking up their kids. And if we try too hard, the cure will be worse than the disease.