Purple potato porridge turns blue because it is rich in plant anthocyanins, which changes with the change of environment and presents different colors in different water. For example, purple potato porridge will appear blue when boiled with alkali, purple when boiled with acid, and purple when boiled with neutral water.

2 Why doesn't purple potato porridge turn blue? Add white vinegar or lemon juice.

Purple potato porridge turns blue because the environment of porridge is alkaline. At this time, adding some acidic liquid can change the color back. White vinegar and lemon juice are common acidic liquids in life. Just put some purple potato porridge when it turns blue.

3 How to cook porridge with purple potato Ingredients: purple potato.

Method: 1, the purple potato was washed and peeled.

2. Cut the purple potato into small pieces or slices and steam in a steamer for ten to twenty minutes.

3. Put the cooked purple potato into warm water and mash it with a blender.

4. Pour it out and then use the bowl.

What are the benefits of eating purple potato porridge? Slimming purple sweet potato is low in calories, low in fat and cholesterol, and can also help sugar to be converted into fat for storage in the body. So eating purple potato porridge every day helps to lose weight.

Prevention and treatment of constipation Purple potato contains a lot of cellulose, which can help gastrointestinal peristalsis, clean the intestines and ensure smooth defecation. Therefore, eating purple potato porridge often helps to expel toxins from the body and prevent other intestinal diseases.

Enhancing immunity Purple sweet potato contains a lot of mucin, which can help prevent the occurrence of collagen diseases. The vitamins and minerals in purple sweet potato can regulate human functions and improve human immunity. So eating purple potato porridge often is good for your health.