There is information asymmetry everywhere in life. When you buy food and drugs. When you flick on a television program. When you decide to rent a car. When you go on a date.
You take steps - consciously or subconsciously - to mitigate information asymmetry all the time without even realizing it. You look for cues from others. You ask advice from people you trust. You read reviews. You gather signals about the your trading partner’s reputation. You trust established brands. You advance forward in small steps, to build trust about the quality of the product or service being offered. There are lots of ways to do this.
I would argue that a method like I describe is probably exactly how you decided to buy the computer you are reading this message on, right now.
Many people don’t believe this, and insist that without the FDA protecting us we would all die in the streets. Presumably, because companies are plotting somewhere in corporate boardrooms to poison their customers and kill them. At least, that’s where the conversation usually degenerates towards, on threads like this.
A simple example that I like to describe, that applies to most people, is travel to foreign countries. Many of us have gone to Mexico, or to some other country in South America, Europe, Asia or Africa for a vacation.
The FDA does not have any authority there. So what did you do? Did you starve to death - fasting the whole time because the FDA was not there to inspect your food?
Of course not. You took what options were available to you (local groceries, restaurants, friends or colleagues, etc.) weighed the risks and rewards accordingly, and made a decision.
And lived to tell about it, too! Amazing! So do about 6 billion other people, every day.
If you like what the FDA provides, go for it. Follow their recommendations to the letter. Read their publications. Do whatever you want to do.
But why would you willingly sign over your rights to them, so they can now FORCE you to eat and ingest only what they allow? And leave you no choice in the matter, whatsoever. Why would you do such a thing?