Nestle heavily market powdered baby milk in poor countries. This is expensive stuff reducing overall family wealth considerably in places where being poor often kills. Often to save money it will be over diluted.
But the big bad out of this is bad water. A woman's body is evolved to be highly effective at filtering out infection from water.
The media likes to fixate upon AIDS, but actually diahorrhea kills far more, msotly children. Dehydration and related conditions are extremely dangerouos for very small kids.
Nestle has used the high levels of corruption in poor countries to get the government to help them market this crap as "good".
also of course if there is some problem in local food supply, the mothers milk has dried up, so they cannot fall back on this.
Also the immunity kids pick up through proteins absorbed from mothers is vastly more important in countries where infection is rampant.
Of course it's necessary to use some formula milk for when breastfeeding is not available. But Nestles behaviour has killed many children.
It will come as no surprise that not only does Nestle give big money to the Labour party and even a former manager of the firm is one of their MPs, and that Labour peers have found it necessary to defend their behaviour.
The tories would of course do the same thing, but Nestle doesn't feel the need to get in with them because until recently the Welsh nationalists were more likely to form the next government.