The white substance that sometimes seeps out of sliced sweet potatoes is a completely normal sap, a mixture of sugar and starch. It is not harmful in any way and is completely safe to eat.
Why is there white in my purple sweet potato?
This is entirely normal, and the liquid starch is a mixture of sugar and starch that is not limited to just sweet potatoes. You may notice it when cutting into squash as well. Depending on how you cut the potato, you may see the liquid starch as white spots in the sweet potato or in its liquid form.
Why does my sweet potato have white inside?
You may have also noticed some white spots appearing in sweet potatoes when you get to slice them in half, speckling through the inside. Like the oozing white sap earlier, these white spots are still the starch and sugar finding their way inside through the holes they can manage to escape from.
Do purple potatoes have white inside?
"Michigan Purple" is a medium-season potato with smooth purple skin and bright white flesh. According to Michigan State University, it rarely suffers from diseases or internal blemishes and defects. "Purple Viking" produces large, round potatoes with moist, firm flesh.
Can purple sweet potatoes be white inside?
Today they are primarily grown in California. This sweet potato variety has reddish-purple skin with a flesh that is actually white. Their name comes from the Japanese word for purple because of the color of their skin.
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