The approximate rate of vitamin A for men is 1,000 mg per day and for women 800 micrograms per day. Possible give preference to the use of vitamin And foods high in its content, and not take the pills.
Vitamin A can be obtained in two different forms: through animal sources, butter, egg yolks and through foods of plant origin - the carrot contains beta-carotene, which the body converts into vitamin A.
Take vitamin a in the formulations is only in the case of its acute shortage, which cannot eliminate by changing the diet. To do so, preferably under the supervision of a physician. If this is not possible, in any case can not exceed the dose it could be dangerous. The body will not be able to withdraw the excess and it will accumulate in the liver.
Vitamin A in beef liver, butter, cod liver oil and egg yolks, when frozen these products, partially destroyed, so it is advisable to eat them fresh.
If you do decide to take vitamin a in the form of a drug, it's better to do while eating. You can swallow capsule whole or mix contents with food. The drug in liquid form can be mixed with juice.
For the shortfall of vitamin A, drink a couple of tablets once is not enough. The drug must be taken regularly, taking breaks for a few days. It should be noted that aspirin, laxatives and sleeping pills hinder the absorption of many vitamins, including vitamin A.
If after long-term administration of vitamin you will find dizziness, severe abdominal pain, irritability, orange skin tone, and nausea — seek immediate medical advice.
Vitamin And absorbed by the body more effectively if at the same time you are taking b vitamins, C, E and minerals: calcium, zinc, phosphorus, and magnesium.
Alcohol even in the smallest quantities destroys the b vitamins, potassium, zinc and calcium. Almost completely destroyed the vitamin and under the influence of nicotine.
Advice 2: How to make vitamin a
Vitamin a, or retinol, is essential for the normal functioning of the body. Its deficiency leads to vision disorders, infectious skin lesions and respiratory and other serious problems.
It should be remembered that the body is easier and better to assimilate vitamin a in its natural forms, therefore, should be increased in daily diet containing the number of retinol products. The best sources are fish oils and liver, in large enough quantities it is contained in butter, whole milk, cream and egg yolks.
Vitamin a enough slowly accumulates in the body and slowly excreted. If the doctor diagnosed a deficiency of retinol, quickly to replenish his stock of conventional products fail. In this case, you should additionally take its dosage forms.
Retinol is available in a variety of dosage forms ranging from tablets and ending with a solution for intramuscular injection. In the most severe cases, when a rapid increase in the number of vitamin A in the body, use intramuscular injections. This method allows in the shortest possible time to deliver the drug in the blood.
In less severe cases use drops, pills, tablets, etc. One of the most convenient dosage forms of retinol are capsules. One capsule contains 33 IU of vitamin A, your doctor may prescribe one to several capsules per day.
To get from taking vitamin maximum therapeutic effect, you should definitely adhere to recommendations for its reception. Namely, I have to take it strictly twice a day, 10-15 minutes after eating. Doses depend on the specific disease and its severity. For example, in cases of vitamin deficiency of mild and moderate adults appoint 33 thousand IU/day. In diseases of the skin dose for adults increases to 50-100 thousand IU/day for children, these figures should be lower by 5-10 times.
For the prevention of beriberi also used certain doses. For women the recommended amount is 2300 IU per day for men is 3,000 IU. Given that retinol is a fat-soluble vitamin and is slowly excreted from the body, do not exceed the recommended physician dosage, as excess vitamin a is just As injurious to health as the lack of it.