Previously, it was thought that the toxicity of vitamin C was very small, even if it was taken orally in excess, it would only happen slightly.
Mild nausea, vomiting, diarrhea, etc. But in recent years, according to clinical observation and animal experiments, it has been proved that
Long-term overdose of vitamin C will lead to a series of adverse reactions.
(A) authoritative research abroad shows that anyone wants to improve their understanding of colds.
People who take too much vitamin C for a long time, the content of vitamin C decreases.
This is because taking a large dose will change the regulation mechanism of vitamin C in the body, accelerate the decomposition and
Excretion. Therefore, once drug withdrawal can lead to drug withdrawal reaction, early scurvy symptoms (including
Gum swelling and bleeding, loose teeth).
(2) Taking large doses of vitamin C during the growing period will make children prone to bone diseases in the future.
Because a large dose of vitamin C will destroy the process of osteoblast formation.
(3) Take vitamin C4 grams orally every day, and after one week, urinary calcium oxalate stones may appear.
And kidney calculi, which can cause hematuria and renal colic in severe cases. Excessive vitamin c can make urine acidic,
Causing oxalate stones.
(d) High dose vitamin C can resist the anticoagulant effect of heparin and dicoumarin, and lead to
Thrombosis makes the original cardiovascular and cerebrovascular diseases more prone to cerebral infarction (stroke).
(5) Taking a large dose of vitamin C can increase urine output because of its reducibility.
The false positive reaction of urine glucose hinders the diagnosis and treatment of diabetic patients and the accurate mastery of hypoglycemic drugs.
Dose.
(6) High dose of vitamin C can reduce female fertility and affect embryo development.
Because a large dose of vitamin C is easy to form an "acidic constitution" that is not conducive to germ cells in the body.
Development.
(seven) when the daily dose of vitamin C exceeds 3 grams, it can lead to an increase in intestinal peristalsis, causing certain
Some people have abdominal cramps and diarrhea.
(eight) vitamin C and vitamin B 12 food intake at the same time, can destroy a considerable amount.
Vitamin b12; ; However, vitamin B 12 is destroyed in large quantities, which makes people prone to anemia.
To sum up, although vitamin C is an essential substance to maintain human metabolism, it is very important for prevention and treatment.
Many diseases have very important clinical value, but excessive intake is not beneficial to the human body, even
Hurt.
Taking 1 g vitamin C every day will not cause harm to the body. The maximum intake of vitamin C can reach 5000 mg per day, that is, 5 grams.
However, it should be noted that if you take it in large doses for a long time (above 1000 mg per day), it will make the body tolerant and reduce the absorption and utilization of vitamin C. At this time, if you stop taking the medicine suddenly, you will have symptoms of vitamin C deficiency. Therefore, if you need to stop taking medicine, you should gradually reduce the dose and not stop taking medicine suddenly in a short time.
Finally, it is suggested that it is enough to take 100 mg of vitamin C small white tablets every day if taking vitamin C only for health care, rather than for the treatment of some diseases. At present, vitamin C effervescent tablets are basically 1000 mg, which is unnecessary. In addition, VC is a water-soluble vitamin, which will be metabolized six hours after being absorbed, so it is better to take it two or three times a day, which will be better than taking it in a single large dose.
Also, VC should not be eaten with foods rich in Ca.
Soft-shell foods such as shrimp contain a large number of high-concentration-pentavalent arsenic compounds. This substance has no toxic effect on the body after being ingested. However, after taking vitamin C, the original nontoxic pentavalent arsenic (namely arsenic anhydride, also known as arsenic pentoxide) becomes toxic trivalent arsenic (namely arsenic anhydride), also known as arsenic trioxide, and its chemical formula is (As2O5). This is ...