Yup they definitely work too, but eating an entire raw green pepper doesn't always sit great in my stomach, and I don't always have red/orange/yellow varieties on hand. If I'm all out of citrus, I'll definitely grab a bell pepper instead... but I usually make sure to have citrus around.
For me it's either a craving for lime/citrus or strawberries. When I crave strawberries, I know somethings up.
Oh yeah strawberries do the trick too. I just only have them around in the summer and go through them so quickly...