This is the problem I had in mind when building https://chota.link. I have seen too many broken previews. This little app lets you create short link and specify metatags. Try this short link on LinkedIn: https://chota.link/jVZ2Hd. I tested it and seems to be working.
How about health drinks / food? Do you know if yc would have any interest or expertise to help natural food companies? Like Kambucha is $600M company now.