We do have those restrictions. Consider the UK's Bradford Sweet Poisoning of the 1858 when the standard of putting gypsum as cheap filler in sweets instead of more expensive sugar lead to an accident of using arsenic instead, and lead to regulations on danerous behaviour by chemists and on the adulterations of foodstuffs - https://en.wikipedia.org/wiki/1858_Bradford_sweets_poisoning
And of course there are regulations on insect contamination, mould and fungal contamination, on use by dates, on permitted/banned additives and preservatives, on quality of packaging material, on preparation and handling of eggs; the most egregious "unhealthy food" that causes serious sickness and death quickly has been restricted. What's left is a lot of "compounds over a lifetime of it" kinds of things.
And, of course, public smoking bans are an unhealthy behaviour restriction, so are drug bans.
We do have those restrictions. Consider the UK's Bradford Sweet Poisoning of the 1858 when the standard of putting gypsum as cheap filler in sweets instead of more expensive sugar lead to an accident of using arsenic instead, and lead to regulations on danerous behaviour by chemists and on the adulterations of foodstuffs - https://en.wikipedia.org/wiki/1858_Bradford_sweets_poisoning
Trans fats have been regulated, e.g. in Canada: https://en.wikipedia.org/wiki/Trans_fat_regulation#Canada
The UK has a sugary drink tax: https://en.wikipedia.org/wiki/Sugary_drink_tax#United_Kingdo...
And of course there are regulations on insect contamination, mould and fungal contamination, on use by dates, on permitted/banned additives and preservatives, on quality of packaging material, on preparation and handling of eggs; the most egregious "unhealthy food" that causes serious sickness and death quickly has been restricted. What's left is a lot of "compounds over a lifetime of it" kinds of things.
And, of course, public smoking bans are an unhealthy behaviour restriction, so are drug bans.