The beginning of summer has passed
The temperature began to rise significantly in various places
Ultraviolet rays are also intensified
Many people are starting to pay attention to sun protection
But except for shading
Pay attention when it comes to diet, too
Some foods are eaten after that
Not only does it make people prone to tanning
It can even trigger dermatitis
Recently, there have been media reports
Aunt Li from Zhejiang loves to eat toon scrambled eggs
After eating it for three days in a row
She asked her sisters to go out
Soak up the sun
It turned out to be in the evening
Feeling tightness, tingling, and itching in the face
The face is red and swollen
It's hard and painful to the touch
This is especially true of the eyelids and lips
Doctors are learning more about the medical history
and improve the relevant inspections
Confirmed diagnosis of phytosolar dermatitis
Why does eating toon cause dermatitis after a few days?
It turns out that toon is a light-sensitive food
Light-sensitive foods
It makes the skin more sensitive to light
It is easy to cause it after eating
Phytophthoritis
People with allergies
This is especially the case when this type of problem arises
so
Does eating photosensitive food really turn black?
What photosensitive foods do you know?
↓↓↓
Common light-sensitive foods
Vegetables: lettuce, fennel, celery, spinach, coriander, rape, mustard greens, marantou, amaranth, toon;
Fruits: citrus, lemon, mango, pineapple, fig;
Seafood: snails, shrimps, crabs, mussels.
Why do light-sensitive foods make people dark?
Light-sensitive foods
Basically, they all contain the same ingredient
Furanocoumarin
The ingredient is a natural photosensitizer
Mainly found in the Rutaceae family (e.g. citrus fruits)
and Umbelliferis (e.g., parsnip, parsley,
celery, carrots) plants
Fresh parsley, grapefruit juice, grapefruit,
lime juice, lime and lemon juice, etc
Both contain high concentrations of furanocoumarins
When people ingest or come into contact with skin
Plants that contain furanocoumarins
can allow furanocoumarin to be absorbed
into the bloodstream, skin
(Source: Healthy Hangzhou)
Furanocumarins themselves do not cause damage to the skin
But when the skin comes into contact with furanocoumarin compounds
and after long-wave ultraviolet (UVA) radiation
Photoreceptors can damage cell membranes and cellular DNA
Causes cell death and epidermal damage
Produces a non-immune-mediated inflammatory response
The main manifestations are:
Erythema, blisters, and epidermal necrosis appear on the skin
and post-inflammatory hyperpigmentation
So it will affect the skin tone
But
The amount of food eaten by a healthy person with a normal diet
Don't worry too much about the darkening of your skin
Experimental studies have been carried out on this
Volunteer in a short period of time
Eat 300 grams of celery root
It is done 2 hours after eating
UVA exposure for 10 minutes
No skin reactions were observed
Combined with the subsequent experiments, it was calculated
Healthy people need it in a short time
Eat about 2 catties of celery root
will produce phototoxicity
Follow our normal eating habits
It does not cause phototoxic damage
But if your skin is in dermatitis,
Acne, eczema, lupus erythematosus, solar dermatitis, etc
Under special circumstances
Don't eat these photosensitizing foods
Other than that
Compared to eating foods that contain furanocoumarins
After skin contact with such foods
Direct exposure to the sun may turn dark
Problems such as erythema, blisters, etc., may even occur
【Tips】
Photosensitive foods make people darker, and they need to be established under the following necessary conditions:
1. Eat a large amount: According to the experimental data, it is estimated that eating at least 2 catties of photosensitive vegetables will reach the phototoxicity threshold.
2. Exposure: Exposure to ultraviolet (usually sunlight) radiation of 320-380 nanometers.
3. Direct contact, light agility, and fragrant bean element.
These foods are eaten regularly
Increase the body's "sun protection"
There has been a lot of emphasis on sun protection
In fact
And not just to avoid tanning
It also delays skin photoaging and protects eyesight
and an important way to reduce the risk of cancer
During life
There are some foods that contain more antioxidants
Comparable to a natural "sunscreen"
01 Fresh dates
Fresh jujube is the "king of vitamin C" in fruits, and its vitamin C content is almost 10 times that of lemons of equal quality and 60 times that of apples. Vitamin C can accelerate collagen synthesis and prevent melanin precipitation, which is an indispensable nutrient in beauty and skin care.
02 Green tea
Green tea is rich in active substances such as tea polyphenols, caffeine, and theanine, which can help alleviate skin damage, sagging, and roughness caused by ultraviolet radiation, and can reduce the amount of harmful peroxides in the body to a certain extent. However, it is best to drink weak tea, not strong tea, to avoid hurting the kidneys.
03 Fatty marine fish
Salmon, tuna, sardines, etc. are all fatty marine fish, which are rich in Ω-3 fatty acids. This substance can reduce redness and inflammation caused by ultraviolet radiation, and reduce the possibility of skin photoaging, photosensitivity and skin cancer.
04 Nuts
Nuts are rich in vitamin E, which also helps to inhibit the activity of tyrosinase, reduce the formation of melanin, avoid tanning, spots, and delay skin aging. But pay attention to the amount when eating nuts, generally about 10 grams a day is enough.
These foods can also make people "discolored"
In addition to the photosensitive foods mentioned above
Some food
Although it does not cause the skin to darken
However, it is possible to turn the skin yellow or orange
That's foods that contain carotenoids
Carrots, sugar oranges, papayas,
Foods such as mango, pumpkin, endive, etc
Rich in β-carotene
This ingredient can be converted into vitamin A in the body
Good for our eye and skin health
But if you binge eat for a short time
Excessive ingestion over a period of time
β-carotene
This will cause excess carotene to enter the body
The body can't metabolize it for a while
It will be deposited in the skin and stain the skin yellow
Hypercarotene is present
Tomato paste, tomato juice, guava,
Watermelon, grapefruit, etc. are rich in lycopene
It is also a type of carotenoid
It has strong antioxidant capacity
But if you take a large amount of it for a long time
Foods rich in lycopene
Lycopendemia may result
It is manifested as an orange stain of the skin, turning yellow and orange
Although this type of food is eaten a lot
Can cause discoloration of the skin
But this is only temporary
There is also no health hazard
Just stop eating carotene-rich foods
About a week or so
The skin will slowly change back to its original color
Drinking plenty of water can also speed up metabolism
If you want your skin not to darken
The most important thing is to do a good job of sun protection
Ate photosensitive foods
Be sure to pay more attention to sun protection
Wear a hat, sunglasses, an umbrella, and a mask
It's all a good idea
Within 15 to 30 minutes before going out
It is also recommended to wear sunscreen
Protection
Reprinted from: Popular Science of People's Daily Online