Can purple sweet potatoes that have turned green when exposed to alkali still be eaten?

Purple sweet potatoes turning green when exposed to alkaline conditions is a phenomenon caused by the reaction between natural pigments in purple sweet potatoes and alkaline substances. Whether they can be consumed depends on an individual's health condition.

1. Can consume

Green discoloration of purple sweet potatoes due to alkaline exposure generally does not pose food safety concerns, nor does it significantly alter the taste or texture. It usually only affects the food's appearance, making it less visually appealing. Individuals without gastrointestinal conditions such as gastritis or gastric ulcers can typically eat it normally. Purple sweet potatoes contain vitamins, minerals, and other nutrients that help supplement essential nutrients for the body.

2. Should not consume

Individuals with excessive gastric acid secretion or chronic gastrointestinal diseases such as gastritis or gastric ulcers are generally advised against consuming alkaline-exposed purple sweet potatoes, as the alkaline substance may affect gastrointestinal function and cause discomfort such as stomach pain or bloating.

If discomfort occurs after consumption, prompt medical attention is necessary. Treatment should be conducted under a doctor's guidance to prevent worsening symptoms and increased treatment difficulty. In daily life, maintain a light and easily digestible diet, and consume nutritious foods to help enhance the body's resistance to disease.