It’s a quack autism treatment antivax parents use on their children (it is torture). Often in diluted enema form. No I am not joking. https://twitter.com/trekonomics/status/1253451248746942464

Let me add a couple links here if this is going to pick up any steam. https://www.nbcnews.com/tech/internet/moms-go-undercover-fight-fake-autism-cures-private-facebook-groups-n1007871

Here's @oracknows from 2012. This is a long-running conspiracy theory.
https://scienceblogs.com/insolence/2012/05/25/selling-bleach-as-a-cure-for-autism

And in case you were wondering about my source for Trump's dabbling in antivax+autism networks. I've got a pretty strong source here. https://twitter.com/realDonaldTrump/status/449525268529815552

People are often shocked when they hear about this. It is, I'm afraid, the top of the iceberg when it comes to the way parents abuse their disabled kids in hopes of "cures" (let along abuse because its abuse).

Trump's disengagement with antivax stuff has been a tiny reprieve amidst all the horror.

but once an antivaxxer ... always a bleach drinker.