Nutritional value
Oranges are rich in vitamin C and citric acid, the former having a cosmetic effect, while the latter has the effect of eliminating fatigue.
The thin skin on the inside of oranges contains dietary fiber pectin, which can promote bowel movement and lower cholesterol.
Citrin can strengthen the toughness of capillaries, lower blood pressure, and expand the coronary arteries of the heart. Therefore, it can be said that oranges are a food for preventing coronary heart disease and arteriosclerosis.
In fresh orange juice, there is a substance with strong anticancer activity, "Nomillin", which can decompose carcinogenic chemicals, inhibit and block the growth of cancer cells, double the activity of detoxification enzymes in the human body, prevent carcinogens from damaging the nucleus, and protect the integrity of genes.
Choose a good move
When purchasing oranges, you should choose those with a correct shape, no deformities, bright red or orange fruit color, smooth and bright fruit surface, and fresh fruit stems. The following five steps can be followed for specific selection:
On size
It is better to choose a medium one, as large ones have a thick skin and a plump flesh; Small individuals develop poorly and have a poor taste.
Discriminating color and lustre
You should choose orange red or orange yellow with a smooth skin. Overmature pale yellow, astringent green, and porous tangerines are not acceptable.
Specific elasticity
Press lightly with two fingers, preferably with good elasticity. "The skin is thin, and you can smell a faint fragrance through the orange peel. Gently pinching the skin with your hand will produce some juice, which is also a good orange.".
Fundus fossa
Viewed from the side, the bottom with a long handle is better recessed, while the bottom is flat or convex, which is not good.
Pinch the bottom
The bottom feels soft and more sweet when pinched; It is hard to pinch, and generally has a thick skin. It tastes mostly sour when eaten.
Citrus is a favorite fruit among people, but if you eat too much, the skin around your body will turn orange, especially on the palms of your hands, feet, nasolabial groove, and the periphery of your nostrils. This phenomenon is medically known as carotenemia or leaf rubemia, also known as skin orange disease.
Therefore, eating 1 to 3 oranges a day is more appropriate. If the above symptoms have occurred, immediately stop eating the above vegetables and fruits, and drink plenty of water to increase urine volume. Generally, the yellow color can be removed within a few days.