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Efficacy and Taboo of Purple Onion
Onion contains high content of protein, vitamins, carbohydrates, cellulose, phosphorus and iron, as well as trace elements and sulfides, which have anticancer, antibacterial and antithrombotic effects. Onions are not only food, but also health food.

1. Raw onions can fight cancer: The taste of raw onions is a little strong, and it is this taste that has anti-cancer effect. Eat onions raw as much as possible. Eating onions raw can get more nutritious and healthy things.

2. Onions can lower blood pressure, prevent thrombosis and promote sodium excretion, thus lowering blood pressure.

3. Vitamin E in onion is an ideal antioxidant, which can prevent senile plaque. It contains a lot of nutrients such as sulfur and vitamins, which can eliminate waste in the body, slow down the oxidative aging of internal organs and prolong life.

4. Selenium in onion is also a strong antioxidant, which can scavenge free radicals in the body, enhance cell vitality and metabolism, and has the functions of preventing cancer and resisting aging.

Onion also has a certain refreshing effect, which can help cells make better use of glucose, lower blood sugar and provide heat energy for brain cells, so it is a good choice for diabetic patients.

6. Onions can also improve the bone density of calcium and help prevent osteoporosis.

Common onions are divided into purple skin and white skin. White-skinned onions are tender, moist and sweet. Because of its golden color, it is suitable for baking or stewing because it is seasoned after long cooking. Purple onion meat is reddish and spicy, suitable for cooking or lettuce salad. Relatively speaking, the nutritional value of purple onion is better.