Source: science rumor platform
Tomato is a common food in life. It is very delicious whether it is eaten, fried or soup. More importantly, tomatoes have a certain nutritional value, so they are loved by people.In addition to eating value, some people think that tomatoes are rich in vitamin C and can be whitening more.Is this statement correct?
The truth may disappoint some netizens.
Picture source: Visual China
The vitamin C content of tomato is high?
Tomato tastes sweet and sour, so many people think that eating it must specially supplement vitamin C, and also think that ingesting vitamin C has a whitening effect.
The truth is not like this!
The reason is 2 points:
1. The vitamin C content of tomatoes is not high, only 14 mg/100 grams. This content is not rich in vegetables.%.
There are also some varieties of tomato vitamin C content. For example, the vitamin C content of spring peach persimmons is the highest, up to 34.17 mg/100 grams, followed by Dandong 409 and Xiaohuang Fei. The content is greater than 25 mg/100 grams.However, if the storage method is improper, the vitamin C content will decrease significantly.However, tomatoes are sweet and sour, and it is easier to taste.
2. It is rumored that vitamin C can whiten, which is related to vitamin C’s antioxidant.Vitamin C can inhibit the activity of tyrosinase, while tyrosinase is the main speed limit enzyme of the catalyst and melanin production process of tyrosine transformed into melanin. Vitamin C can make the color after inhibit its activity, which can make the color.The deeper oxidation pigment reduction is a lighter -reducing pigment pigment, which inhibits the formation of melanin, and it also plays a so -called whitening effect.
However, this is just aimed at external use, and it does not show that eating foods rich in vitamin C can also whiten.In the same way, some people think that tomatoes are rich in glutathione so it has a whitening effect. This is mainly for external use. At present, there is no reliable evidence that rich glutathione foods can whiten.
Therefore, based on the above two reasons, don’t expect to eat tomatoes if you want to whiten!
What is the prominent nutrition of tomatoes?
Although it is not the strength of tomato in supplementing vitamin C, its lycopene content is still excellent, and the more mature tomatoes, the higher the lycopene.For example, the content of lycopene in vegetables such as carrots and pumpkins is about 0.1 ~ 1.5 mg/kg, while the lycopene content in fresh and mature tomato is generally 31 ~ 37 mg/kg.
The lycopene content in tomato products may be higher. For example, the lycopene content in tomato juice and tomato sauce is about 93 ~ 290 mg/kg according to the concentration and production method.
Picture source: Visual China
What is the use of lycopene?
Elinacasta is antioxidant. Our human body cannot synthesize lycopene by lye, so we can only obtain from food.Crimeline in lycopene can not only help us anti -inflammatory, enhance the body’s oxidation stress and improve immunity; it can also protect cardiovascular health and help reduce total serum cholesterol and low -density lipoprotein cholesterol (bad cholesterol); serum in serum; in serumThe increase in lycopene concentration is negatively correlated with collagonase N -end peptide (signs of bone absorption), which can reduce the risk of osteoporosis after menopause.
In addition, although there is no evidence that eating tomatoes can whiten, some studies have mentioned that ingesting a certain amount of tomato sauce daily can significantly reduce the incidence of skin sunburn in women and have a certain skin light protection effect.It can help avoid ultraviolet damage caused by the outdoor campaign for a long time, and reduce destruction of deep skin tissue.
How to make lycopene better?
Although tomato is rich in lycopene, this ingredient is good for health, but its absorption in the human body will be affected by many factors.
The chemical structure of natural lycopene is a transliteration, and our human body can better absorb and utilize it.If you want to make the transformed lycopene into a cosmetic configuration, you must pay attention to the eating method.
It is best to use oil to cook after heating. This is because thermal processing can transform the transforming part of the natural lycopene into a smooth structure, and the fat in the food substrate can promote the release of lycopene, add oil heat treatmentLate lycopene is easier to absorb more than unproofed lycopene.
If you just like to eat tomatoes raw, you chew carefully when you eat it. The mechanical effect can also promote lycopene to release from the cell matrix. At the same time, eat some foods rich in high -quality fat, such as nuts.
Tomato will become orange/red when eating too much skin
Some people may say: Since lycopene is good for health, the content of this ingredients in tomatoes is high, then eat more.
First of all, eating too much tomato will inevitably affect the intake of other foods, and may increase the risk of malnutrition.
Secondly, although eating too much lycopene is not poisoned, but if you don’t want your skin to become orange or red, don’t eat tomatoes every day.This is because lycopene intakes occur too much lycopenemia, which is mainly manifested as orange or red in skin color.
However, this is not a disease, and it is not harmful to health. The symptoms will gradually disappear after stopping lycopene for a while. It is a reason to cause the skin to become orange after eating more carrots.
There is no whitening effect to eat tomatoes!
Vitamin C can have a whitening effect under external use, but this does not show that eating foods rich in vitamin C can also whiten.Moreover, the vitamin C content in tomatoes is not rich in vegetables.
Author: Xue Qingxin, a registered nutritionist
Review: Han Hongwei, researcher at the National Food Safety Risk Evaluation Center
Editor in charge: Zhang Zhaudu
Forward: Wei Shujing
Review: Hao Lin