Purple potatoes are not a photosensitive food. Photoreceptor food can directly or indirectly participate in the number and activity of substances related to melanin production, photoreceptor food there are many, such as oilseed rape, cilantro, etc., and purple potatoes are not belong to the photoreceptor food. Purple potato inside the nutrients, every 100 grams of purple potato with calories 119.3 calories, carbohydrate compounds 17.6 grams, dietary fiber 1.17 grams, protein 2.34 grams. There are also potassium 97mg, phosphorus 121mg, sodium 2.4mg, calcium 23mg, manganese 1.36mg, zinc 1.45mg, iron 1.1mg, copper 0.19mg, selenium 2.5mg, eat purple potatoes properly, you can replenish the nutrients the body needs. To summarize, purple potato is not a light-sensitive food, and proper intake of purple potato is beneficial to human health.