Drinking these two drinks regularly is good for your eyes and brain! Some people drink them every day.

Friends, do you need a cup of coffee or tea every day to refresh yourself? Today, I will tell you that these two common drinks have unexpected benefits for our eyes and brain!

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2-3 cups of coffee or 4 cups of tea a day is good for the retina

The Sun Yat-sen University Eye Center and the Australian Eye Center conducted a study in collaboration, looking at the data of 35,557 adults in the UK Biobank database. The results showed that the intake of coffee and tea was closely related to the thickness of the macular retinal nerve fiber layer.

The macula is located in the center of the retina. It is small and only 2 mm in diameter. However, it is the place with the sharpest vision. Because it contains more lutein, the color is darker than the surrounding area. Functions such as fine vision and color vision depend on it. If the retinal nerve fiber layer becomes thinner, eye diseases such as glaucoma, macular degeneration, and optic neuritis may occur, and vision will be seriously affected.

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After carefully ruling out other factors that affect eye health, the researchers found that compared with those who did not drink coffee, people who drank 2-3 cups of coffee a day had a 16% increase in the thickness of the macular retinal nerve fiber layer; those who drank 4 cups or more of tea a day could increase it by 15% (1 cup is 150ml).

But don't be greedy. Drinking more than 4 cups of coffee a day will actually reduce the thickness of the retinal nerve fiber layer. In other words, the relationship between coffee intake and the thickness of the retinal nerve fiber layer of the macula is like an inverted U-shaped figure. The more the better. Moreover, instant coffee is not very friendly to retinal health . Drinking too much may reduce the thickness of the retinal nerve fiber layer of the macula, so try to drink less instant coffee.

2-3 cups of coffee and 2-3 cups of tea a day are good for the brain

Thinning of the retinal nerve fiber layer is associated with cognitive decline and neurodegenerative diseases such as Alzheimer's disease, Parkinson's disease, and mild cognitive impairment. Because the retina is an extension of the central nervous system, changes in the thickness of the retinal nerve fiber layer can directly reflect the health of the brain.

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There is also a large-scale study with more than 360,000 participants, followed up for more than 11 years, and found that drinking coffee or tea alone, or both, can reduce the risk of stroke and dementia. Specifically, the risk of stroke and dementia is lowest when drinking 2-3 cups of coffee, 3-5 cups of tea, or 4-6 cups of coffee and tea combined every day.

If you drink 2-3 cups of coffee and 2-3 cups of tea every day, your risk of stroke can be reduced by 32%, and your risk of dementia can be reduced by 28%, which is even better! In addition, among all types of coffee, ground coffee has the best effect on brain health, followed by instant coffee, and decaffeinated coffee is relatively weaker.

These foods are also good for your eyes and brain

But be careful, these studies only found an association between them, and it is not certain whether it is a causal relationship. If you already love drinking coffee or tea, then you really win, but you have to control the amount. If you don’t like it or are sensitive to caffeine, don’t force it. There are many other foods that are good for the eyes and brain.

Vegetables such as broccoli and spinach , as well as corn, eggs, oranges, etc., are rich in lutein and zeaxanthin, which can increase the density of macular pigment, absorb excess blue light and ultraviolet rays, neutralize free radicals, and protect macular cells.
Flax seeds, salmon, tuna , etc. contain Omega-3 fatty acids, liver, egg yolks, carrots, and mangoes contain vitamin A, bell peppers, dates, kiwis, and strawberries contain vitamin C, almonds, peanuts, and walnuts contain vitamin E, beef and shellfish contain zinc. Eating more of these is good for the eyes.
Zeqiao original copyright contact <br /> In terms of brain health, the MIND diet is very good: eat more green leafy vegetables, berries, whole grains, seafood, poultry, nuts, use olive oil for cooking, and eat less butter, margarine, cheese, fried foods, red meat and its products, and sweets.
Sticking to the MIND diet can slow cognitive decline and reduce the risk of Parkinson's and Alzheimer's diseases. Although it is a bit difficult to follow, there are benefits even if you follow it loosely, and the stricter you follow it, the greater the benefits. In short, drinking coffee and tea in moderation is good, but a balanced diet is the best way. Everyone should choose food reasonably according to their own situation to keep their eyes and brain healthy!