RE: Vitamin C has been found to have very little evidence in other studies. The evidence is mixed at best, against effectiveness at worst.

But it doesn’t make things worse so who really cares? Some people waste their money on useless products.

RE: Screen Time, thanks for that meta analysis. It seems like there is solid evidence for detrimental effects of screen time. It also seems like those effects might be socioeconomically correlated but I haven’t gone through all the cited sources to check if they controlled for status.

The impact of screen viewing is predominantly influenced by contextual factors rather than the sheer amount of time spent watching

I think this line was the one that particularly made me want to look into the articles. If screen time is serving as a proxy for parental engagement then it seems obvious that it would have negative effects, but I’ll need to read the additional articles.

The sources help prove your claim, and have changed my view. Thanks again