Re: No safe level of anything
There is considerable evidence that increased levels of fruit and vegetable give improved medical status, improve internal biome and protection from a lot of disease etc.
That being said, the point was that juice is being made into an enemy by the very health lobbyists who most promote this. Even juice with bits. Whereas having juice as one of the 5 a day at least encourages kids on the route, provides vitamins and hopefully even some fibre ( the bits) if parents don't let the kids be too fussy.
However, I was in a big local authority meeting about promoting children's health a few years back. The Powers-that-Be insisted that our target had to be 5-a-day for every child. I argued, unsuccessfully, that we needed to put our energies into supporting a sensible target in our area. That every child had at least one portion. 5 might have been the guideline, but many of our kids never had any fresh food at all.
I lost. Final outcome. Nothing achieved.