Canned vegetables that contain a lot of salt can be harmful for diabetics. Low-salt or unsalted canned vegetables are a good choice for diabetics, according to WebMD.
The American Diabetes Association recommends fresh, frozen or canned vegetables without added salt, fat or sugar for individuals with diabetes. To ensure that the product meets those requirements, the individual should check the label, which may proclaim that a product has no salt added or that it is low in sodium. If the canned vegetables are salted, draining and rinsing the vegetables with water, then cooking the rinsed vegetables in fresh water reduces the sodium load and makes it a healthier, safer choice.