I got dental fluorosis as a kid from drinking Fluoride water and brushing my teeth so I don’t really believe it’s as safe as you make out. I live in Scotland now where they refuse to put Fluoride in water.
It’s true that it is linked to improving oral hygiene, but it doesn’t mean it should be added to Huel. I’d prefer Huel just wrote on the label that it was recommended that you brush your teeth after ever meal.
Yes there is. A quick search on webofscience shows that one of the most cited papers talking of the controversies of skeletal fluorosis in India due to very low levels of fluoride in the drinking water and malnutrition (Fluoride in Drinking Water: A Review on the Status and Stress Effects) http://www.tandfonline.com/doi/abs/10.1080/10643380600678112
It is also linked to increased Anemia in pregnant women and higher rates of pre-term birth and lower weight children being born at only 1mg/L in the Womens’ urine. (Effective interventional approach to control anaemia in pregnant women) http://www.currentscience.ac.in/Downloads/article_id_098_10_1320_1330_0.pdf
Not the best example as Huel just replaced cyanocobalamin (cyanide is extracted when digested) with methylcobalamin as some individuals are allergic.