The answer is no but kind of.
You don’t have the enzymes needed to break it down, but if you let a cow or other ruminant chew it up and mix it with the bacteria living in its stomach and then sucked that slurry out and drank it then you’d probably be okay.
No. 1 multis are trash in quality 9.9/10 times being poorly bio-available forms (D2 being, ala for “omega 3”, plant vitamin A, etc) also misses out on fat and protein needed for absorption.
2 humans can’t digest grass. That’s why we give it to cows, they can eat and ferment grass, we can eat them for the nutritional dense meat.
Copying this from an askscience post:
>A man under medical supervision once went 382 days with just vitamin supplements. He lost 275 pounds in the process.
>http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2495396/
So technically yes, but also no, not really. We aren’t cows, we don’t have the enzymes and intestinal structure that grazing animals have to digest basic stuff like grass and get anything other than insoluble fiber out of it. It’s the same reason anytime someone brings up monkeys/gorillas as a reason for a plant only diet being more natural to humans, it’s a giant red flag that they don’t know what they are talking about. Gorillas have different enzymes and hormones which allow them to become huge muscular creatures off their diet, humans do not.
The average person will not survive on just multivitamins. For someone severely obese, there’s enough energy reserves for the body to sustain itself, but it’s still a very dangerous idea.