The article is talking about "social scurvy", which they use as a metaphor for people not realising they need to get out of the house and meet up with other people every now and then.
Not the point of the post. Just a clickbaity-ish comparison to reel you in.
In the world of protein low carb pop tarts juice is poison.
How hard is it to find some high-protein fruit juice these days?
Given that there's no strong regulation that forces fruit juice to be made from fruit, I'd wager that this is already a product line.