Moldy Berries: Safe to Eat or Not? Expert Opinion.

One moldy berry doesn't necessarily spoil the whole bunch, but if the moldy berry was clinging tightly to the berry next to it, you may want to discard that one too. Toss any berries that actually have mold on them. Eating moldy fruit can cause allergic reactions and respiratory problems. To avoid moldy berries, buy them in clear containers, keep them cool and dry, use them quickly, and consider buying frozen berries.