Apple dream dream

I had a dream. In my dream I woke up from a night of very interesting dreams.

I told my sister, who told asked me if I had been eating apples before going to bed, because she also had amazing dreams because she ate apples before bed. And you know, she told me in the dream, apples contain a mild hallucinogen that causes you to have vivid dreams if you eat them before sleeping.

That's all I remember from my dream. I woke up and wondered if it was true or false.
If true, then how could I have learned this in my dream - I don't think I have ever heard this while waking-conscious.
If false, then what an excellent untruth to think of. The kind of thing that is plausible enough that you might find it on Wikipedia because it might not be absurd enough to quickly remove. I considered putting it there myself, to see if I could insert it into the collective body of unverified "knowledge," to start what I will call an Originally-Wikipedia Legend (OWL).

Perhaps a bit later.

A google for apple hallucinogen doesn't seem to turn up evidence, so I think this tidbit is dream-only.