Not to mention that we as humans require a balanced diet that includes some meats, or seafood etc... (Or at least vitamin supplements to replace these for those that choose to be vegetarian)
Also, human teeth....there are teeth that specifically assist in chewing meats
What???? What utter tripe...I'm a vegan and eat a balanced diet with no meat or dairy nor any processed foods and I don't need any vitamins or supplements.
The only benefit you get from eating meat is all the things that the animal has eaten itself so just skip the middle part and eat what the animal ate...fruit and veg!
A 100% plant-based diet is widely recognised as one of the most healthiest diets around.
Take a look at the RAVE diet for further research.