Can you buy CBD over the counter in the US?

Excuse me, I was wondering if you could clarify something for me. I've been hearing a lot about CBD lately and I'm curious if it's possible to purchase it over the counter in the United States. I understand that CBD is derived from the cannabis plant, but I've also heard that it doesn't contain the psychoactive compound THC that causes the "high" associated with marijuana. So, is it true that CBD products can be bought without a prescription or medical recommendation in the US? And if so, where would be the best places to look for them? Thank you for your time.