Liposomal technology can deliver vitamins to the cells bypassing digestion. However it can be used in a bad way too.
nanoparticles in food are being used to improve the quality of food. Some might be safe some might not. No one really knows as it has not been tested. It’s used in candy and in dairy products a lot. Titanium dioxide is one of the Nanoparticles used. It is so small that it crosses the blood brain barrier.
do a search on Nanoparticles in food and see for yourself.