- For the protein one, it's too general of a question. Some plant proteins aren't complete proteins while others are, and animal proteins can range from super-healthy oily fish to less-healthy bacon.
- The next three are more standard "almost certainly false" claims that would make sense to ask in a survey like this.
- The acetaminophen/autism thing was in headlines recently with lots of people either hyping it up or trying to discredit it. It's hard to say anything is clear either way, but it isn't completely outrageous to believe this one.
- Finally, "vaccines are used for population control" is just an outright conspiracy theory and not even mainstream for "false health claims."
Lumping different types of questions together like this is like saying "more than 70% of people believe that butter isn't as bad as we thought or that the moon landing was faked."