The "last mix of olive oil and Epsom Salts "? What kind of flush are you doing? I have never read of a flush that advises you to take oil and salts together.
Anyway, I think the matter of taking Epsom Salts in capsules is -like a lot of things - a matter of personal choice.
I held off doing a flush for MONTHS because all I read about was how vile the Epsom Salts were.
As of this date, however, I have done ten flushes, all successful and for ALL of them, I have taken the epsom salts in gelcaps. (By my calculations, this is about twenty capsules per tablespoon - and I don't find that a lot of capsules to take either).
I think the secret is to drink the caps with HOT water - it readily dissolves the gelcaps.