I’ve had those radishes before! They are pretty and taste similar to kohlrabi. What did you do with them?
I would assume elephant garlic would be fine, it must contain more sugar than regular garlic because it’s more closely related to onion then garlic.
1 tablespoon of chopped onion has .43 grams of sugar
1 tablespoon of chopped elephant garlic has 0 grams of sugar
I once had a doctor tell me to stay away from onions because they are too high in sugar. (I know! crazy right!)