Why do some people think that sugar and junk food cause behavioral problems?

If heard some people say that sugar causes behavioral problems and to be honest while I agree that these things aren't good for you, I think saying it causes behavioral problems is bullshit. Behavioral problems happen either because of bad parenting or because the child has psychological issues or maybe they... show more If heard some people say that sugar causes behavioral problems and to be honest while I agree that these things aren't good for you, I think saying it causes behavioral problems is bullshit. Behavioral problems happen either because of bad parenting or because the child has psychological issues or maybe they have a disability like autism for example. So why do some people say that these foods cause behavioral problems?
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