Can you still eat purple sweet potatoes that turn green when exposed to alkaline substances?

Generally speaking, purple sweet potatoes that turn green when exposed to alkaline substances are still edible. Here's a detailed explanation:

Purple sweet potatoes are rich in anthocyanins, which are water-soluble natural pigments that can turn green in alkaline environments. When purple sweet potatoes come into contact with alkaline substances such as baking soda, the anthocyanins change from their original purple color to green. This is a normal chemical reaction that does not produce toxic substances, and moderate consumption will not affect health. Therefore, purple sweet potatoes that have turned green due to alkaline exposure remain safe to eat. However, it is important to avoid consuming purple sweet potatoes together with persimmons, white liquor, crab, bananas, or tomatoes, as this may lead to discomfort such as kidney stones, abdominal pain, or diarrhea.

In daily diet, it is advisable to maintain diversity and reasonably combine various foods such as red beans, Chinese yam, and almonds to prepare nutritious dishes like purple sweet potato and red bean soup, purple sweet potato and yam porridge, or purple sweet potato and almond milk pudding. These combinations not only provide complementary nutrition but also enhance flavor and culinary enjoyment.