Reader Mr. Zhang 2022-2-17Drink coffee on an empty stomach in the morning, what are the terrible consequences? The response column comment:
"The article published on the website (the author is Zhang Deming, professor of the National Academy of Defense and former president of the General Hospital of Rongmin of Taipei) pointed out that coffee will reduce the absorption of vitamins B, D, calcin, iron and steril. Can I ask credible? Thank you."The article provided by reader Mr. Zhang was published on 2021-2-4 in the Health Magazine. Most of the contents in it are extracted from a 2014 paper Effects of caffeine on health and nutrition: A Review. This article is published in a journal called Food Science and Quality Management. Because the level of this journal is too low, it was not included by PubMed. The author of this article is a lecturer at a university in Ethiopia, an African country, named Tsedeke Wolde, who is a nursing student.
As for why Zhang Deming's former governor would pay attention to this low-level essay, it is unknown. In any case, I am now responding to the "5 kinds of nutrient absorption" in his article:
There is something to do with calcification, which says:
"According to 5 mg of calcification is excreted from stool or urine, usually after drinking coffee for a few hours. Coffee may also affect the absorption of calcification and cause calcification to be released from bones. However, according to Linus Pauling, Olerka, USA According to the Institute's report data, in fact, as long as the calcines are properly fed, there is no sufficient evidence that coffee will affect bone health. "My response: In fact, there is a sentence on the webpage of the Lenas Vanlin Institute: "The current evidence is actually too rare to indicate that drinking coffee will increase the risk of bone loss and fracture." Therefore, "coffee may also affect the absorption of calcium and promote the calcium from the bones", which is actually a waste of time.
Regarding vitamin D, this article says:
"Caffeine is actually an inhibitor of vitamin D receiving, so it affects vitamin D absorption, thereby reducing bone density and causing bone relaxation."My response: The function of "vitamin D receptor" is to introduce vitamin D that circulates in the blood into cells. In other words, the "effect of vitamin D receptors" occurs after "vitamin D absorption". Therefore, "caffeine is an inhibitor of vitamin D receiving, so it affects vitamin D absorption" is a logical and incorrect statement. Also, regarding "causing bone looseness", please read the above sentence on the website of the Lenas Velnet Institute.
Regarding iron, this article says:
"According to the study published in the American Journal of Clinical Nutrition, if coffee and meals are combined, the absorption of iron will drop from 5.88% to 1.64% (filtered coffee drip coffee) and 0.97% (instant coffee instant coffee), but if coffee can be drunk 1 hour before the meal, the absorption will not change; but even if it is drunk 1 hour after the meal, the absorption of iron is still the same as that of the combination, losing the meaning of division. ”My response: The research mentioned in this article is the Inhibition of food iron absorption by coffee published in 1983. In other words, this is an old article that will be nearly 40 years old. So, why haven’t there been any updated articles in the past 40 years? Also, and more importantly, have there been any evidence in the past 40 years that drinking coffee will cause blood? If not, then 40 years later, what is the meaning of drinking coffee affecting the absorption of iron?
Regarding vitamin B, this article says:
"Caffeine has a diuretic effect, which means that water-soluble vitamins include vitamin B, will be lost due to increased urine output. Caffeine even interferes with Thiamin (Thiamin), also known as the retribution of vitamin B1. However, caffeine will increase gastric acid secretion, and by increasing endogenous factors secreted by gastric wall cells, it will increase the absorption of vitamin B12."My response: It's just that because caffeine has a diuretic effect, drinking coffee will cause vitamin B loss, which is very naive logic. The key is that is, are there any evidence that drinking coffee can cause vitamin B deficiency?
Regarding ox, this article says:
"According to a small study published in Life Sciences, women aged 31 to 78 who drink coffee and get 6 mg of caffeine per kilogram, oxidation, oxidation, chlorine, oxidation, chlorine, creatine, liver, and water will be excreted in the urine after 2 hours. And the reabsorption of oxidation and oxidation in the kidney tubules will also decrease."My response: "In 2 hours, oxidation, oxidation, oxidation, chlorine, oxidation, liver, and water will be excreted in the urine after 2 hours." It is actually a ridiculous statement. Is it worth striking to have water in the urine? Is there some minerals in the urine worthy of surprise?
My general response: You should know that the impact of food or beverages on health requires comprehensive consideration, rather than being cautious and obsessed with the absorption or loss of a specific nutrient.. As long as it has no impact on overall health, it is actually no need to surprise the little bit of this nutrient if it absorbs less or loses more of that nutrient.
The American Medical Association journal JAMA just published Caffeine and Health a week ago (2022-2-15), pointing out the positive and negative effects of caffeine on health. There is a negative impact, it is this saying: "Caffeine can cause a slight increase in blood pressure in individuals who have previously used small amounts or no use. Caffeine, especially high doses, can cause anxiety and can cause difficulty falling asleep if it is injected later in the day. Abrupt stopping caffeine in the average user may cause withdrawal symptoms, usually between 1 and 2 The peak was reached, including headache, fatigue and depression. Because higher caffeine intake during pregnancy is related to lower baby birth weight, the daily caffeine intake during pregnancy should not exceed 200 mg. "
Therefore, this paragraph does not mention the "influence of 5 nutrient absorption" mentioned in the Health Magazine article.
The final paragraph of this JAMA article is: "Some studies have shown that drinking 2 to 5 standard cups of caffeine-containing or decaffeinated coffee per day can reduce mortality. In some reports, regular drinking of caffeine-containing and decaffeinated coffee and reducing 2 Type diabetes is related to risk of endometrial cancer. In other reports, caffeine-containing and non-caffeinated coffee is related to lower risk of liver cancer, cystite and cyst cancer, but the potential benefits of caffeinated coffee are stronger. Drinking caffeine-containing coffee is also related to reducing the risk of Parkinson's disease and cirrhosis. "
Original text: Drinking too much coffee and drinking missed time affects the absorption of 5 nutrients?