Apparently so...

http://rfcarchives.org.au/Next/Fruits/Carambola/CarambolaAcid1-91.htm

Thanks. Wow, that's a lot of oxalic acid.

Thank you Writersblock and Carol for the info. I am sure going to be careful juicing, that is the only way we like them, at least the season is over in my garden.

Silvia

I love Carambola and had a lovely dwarf tree at my old house that put out enough fruit for the entire neighborhood each year. It had the sweetest fruit -- not tart at all once it was ripe. I grew a seedling from it for someone, and it turned out to be completely sour. That's the bad thing about growing them from seed -- you never know.

Yes, I've heard plenty of people say they have or have eaten good carambolas, but I have to admit I've never tasted one that didn't taste like weak citrus flavored kool-aid with too little sugar. I'd love to like them more.