& quot; scurvy & is lemon the nemesis of quot; acidic or alkaline food? Does drinking lemonade turn black during the day? Can it be whitened?

Summer is the season when a large number of lemons are on the market. Many people like to buy fresh lemons and go home to make lemonade, which is healthy and affordable. Lemons contain high levels of vitamin C and are generally used as beauty food. Is lemon acidic or alkaline? Does drinking lemonade turn black during the day?

Lemon Rutaceae Citrus plant, lemon also known as lemon fruit, foreign lemon, motherfruit and so on. Lemon because of its extremely sour taste, liver deficiency pregnant women like to eat, so it is called beneficial mother fruit or beneficial mother and son. Lemon is rich in citric acid, so it is known as "citric acid warehouse". Its fruit is juicy and fleshy with a strong aroma. Because the taste is very sour, it can only be used as a high-quality seasoning to prepare drinks, dishes, cosmetics and medicines. In addition, lemon is rich in vitamin C, which can resolve phlegm and relieve cough and invigorate the stomach. For bronchitis, pertussis, loss of appetite, vitamin deficiency, heatstroke, thirst and other symptoms, it is the nemesis of "scurvy".

Is lemon acidic or alkaline?

Lemon is consumed by the human body after the final metabolite is alkaline, so it belongs to alkaline food. Lemonade is also an alkaline food, even with honey.

Lemon obviously tastes sour, and the pH value is also acidic, so it is still an alkaline food because although there is citric acid in lemon, citric acid can be completely metabolized to produce carbon dioxide and water in the body, and as carbon dioxide exhales out of the body, the acidity is eliminated. However, the potassium and calcium plasma in lemon remain in the body in the form of metal cations. These ions can be combined with acid ions, which can reduce the acidity of urine, so it is called "alkaline food". Not only lemons, but also most fruits are alkaline foods. This is especially important for patients with gout and hyperuricemia, because uric acid forms salts when the urine is alkaline, which can be easily eliminated by the body and reduce the risk of gout.

How to distinguish alkaline food from acidic food?

Human food can be divided into acidic food and alkaline food. The acidity and basicity of food is not judged by people's sense of taste, nor by the chemistry of the food dissolved in water, but by the acidity and basicity of the final metabolites produced after the food enters the human body.

That is, after digestion, food finally forms nitrogen, carbon, sulfur, chlorine, salt and other forms of acid root left in the body called acid food. Such as: cattle, sheep, pigs, chickens, ducks, fish, grains and so on. Almost all delicious food is acidic, such as fish, meat, rice, wine, sugar and so on.

Vegetables and fruits contain elements such as potassium, sodium, calcium and magnesium, which produce alkaline substances after metabolism in the body, which can prevent the blood from changing to acidity. Therefore, sour fruits are generally alkaline rather than acidic. Chicken, fish, meat, eggs, sugar and other flavors are not sour, but they are acidic foods.

Generally speaking, acidic food weakens the skin, while alkaline food makes the skin healthy. If you eat too much acidic food, the acidity of the blood increases, the activity of the blood all over the body is slow, and you feel tired.

On the contrary, alkaline food can improve the state of blood, feel refreshed all over the body, prevent and treat dermatitis and other skin diseases that are easy to occur in people with weak skin, and prevent premature roughness and aging of the skin.

Strongly acidic food: beef, pork, chicken, tuna, oysters, flounder, cheese, rice, wheat, bread, wine, peanuts, thin sausages, sugar, biscuits, sugar and so on.

Weakly acidic food: Ham, eggs, lobster, octopus, squid, buckwheat, cream, peas, eel, river fish, chocolate, spring onions, hollow noodles, fried tofu and so on.

Strongly alkaline food: milk, tea, persimmon, cucumber, carrot, radish, spinach, citrus, grape, taro, kelp, figs, raisins and so on.

Weakly alkaline food: potato, cabbage, bamboo shoots, mushrooms, rape, pumpkin, tofu, apples, pears, bananas, cherries and so on.

When eating acidic foods, especially meat, be sure to eat enough vegetables at the same time. Calcium and potassium in vegetables can neutralize sulfuric acid and phosphoric acid in meat.

Does drinking lemonade turn black during the day?

For people who worry that drinking lemonade will turn black during the day, the answer is: think too much.

Lemon contains photosensitive substances (limonene, coumarins, mainly coumarins), which means lemons are sensitive to light.

For coumarin to play the role of tanning, three conditions are needed:

1. Special physique (such as patients with systemic lupus erythematosus)

2. exposure to sunlight for a long time

3. Adequate intake of coumarin.

The content of coumarin in lemon is very low. if you want to reach an effective dose, you have to eat hundreds of coumarins at a time and take a skin. Some scientists have done related experiments and come to the conclusion that if there is nothing wrong with your body, you need to eat 300 lemons and bask in the sun for another 300 hours before you will turn black!

So, if you do get dark after drinking lemonade, it may be because you forgot to put on sunscreen.

Can you whiten by drinking lemonade?

For those who count on lemonade whitening, the answer is: no.

VC is indeed a whitening ingredient favored by major skin care brands, but the vitamin C content in lemon is not very high, 22 mg / 100g.

Even if you soak in water with a very large lemon (about 100g) a day, your VC intake is not as reliable as eating 100g of Chinese cabbage (31 mg / 100g).

How to make lemonade best?

A good lemonade should be light, with a slight lemon aroma. If you use too much lemon, such as one or half at a time, it may irritate the mouth and stomach, but also because the taste is too sour, need to add sugar to neutralize, and want to taste sweet, sugar should be at least 5%, drinking too much is not conducive to weight control.

It should be noted that the special aroma of lemon mainly comes from the skin, so it is best to take the skin and cut it into thin slices to soak in water.

A large slice of lemon with skin, soaked in about 600 mL of water, slightly sour but no sugar, a few pieces of ice if necessary, an excellent drink to relieve summer heat and quench thirst.

How to keep the unused lemons?

Fresh lemons are good, but only one or two pieces of water are soaked. How to preserve them after that is an annoying question. In fact, don't worry too much, because lemons have high acidity, so they naturally have some anticorrosive functions. However, in order for cut lemons to be preserved better, you need to pay attention to the following points:

1. Cut with a clean knife

2. Wrap the remaining lemons in plastic wrap and refrigerate them in the refrigerator

3. Use it as soon as possible. After all, it won't be fresh after a long time.