Everything about Vitamin B

The vitamin B complex
Other common names: B vitamins, vitamin B1, B2, B3, B5, B7, B9, and B12

Names Medical / Scientific: Thiamine (B1). Niacin (B3), fantotenico acid (B5), pyrodossina (B6), biotin (B7), folic acid or folatina (B9), cobalamin (B12)

Description
The B vitamins are essential for the growth, development, and a variety of many other bodily functions. Play a very important role in the activities of enzymes, proteins that regulate the chemical reactions within the body, which are important in turn food into energy and other substances necessary. The B vitamins are found in the plains and in other sources of animal food.

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The B vitamins are an important part in the diet and are needed to help prevent many health problems. But, with the exception of vitamin B9 (folic acid), there is not enough scientific evidence to determine if the B vitamins may reduce the risk of cancer.

People with a low intake of folic acid have a higher risk for certain types of cancer. A diet rich in vegetables including this vitamin, and quite a daily multivitamin supplement containing a daily value of folic acid every day is recommended by some experts for the prevention of cancer. (See our separate document, folic acid, for more information.)

Available scientific evidence does not support the thesis that any type of B vitamin is an effective remedy for people who have already contracted cancer.


For what is it used?
Scientists know that B vitamins are an important for many bodily functions:

Vitamin B1 (thiamin) and vitamin B2 (riboflavin) helps the body produce energy and help the enzymes that influence the muscles, nerves and heart.

The vitamin B3 (niacin) has an important role in energy production in the cells and helps to maintain the skin, the nervous system, and the health of the digestive system.

Vitamin B5 (pantothenic acid) influences normal growth and development.

Vitamin B6 (pyridoxine) helps the body break down proteins and carbohydrates in addition to helping the body in the production of hormones.

Vitamin B9 (folic acid) helps the cells within the body to create and maintain the DNA and is important in the production of red blood cells.

Vitamin B12 (cobalamin) plays an important role in the growth and development of the body. It 'also important for the production of blood cells, for the function of the nervous system, and for how the body uses folic acid and carbohydrates.

The lack of certain B vitamins can cause anemic, fatigue, lack of appetite, abdominal pain, depression, pain in the upper and lower limbs, muscle cramps, respiratory infections to the channels, hair loss, eczema, failure to thrive in children, defects birth.

Some alternative medical theories believe that the lack of vitamin B weakens the immune system and makes the body vulnerable to cancer. Recommend high doses of B vitamins as a treatment for people with cancer. Many researchers are studying the relationship between the vitamins and the risk of developing certain types of cancer.

What door?
Nutritionists confirm that a balanced diet includes four daily servings of fruits and vegetables, such as corn, which provides most of the people all the B vitamins they need. Only a few amount of vitamins are necessary to achieve the assumptions needed daily. But many people do not eat enough fruits, vegetables, and other health foods to achieve the necessary quantities. The National Academies of Science (NAS) recommends that adults older than 50 years take supplements of vitamin B, or eat foods rich in these vitamins in order to prevent failure, which is common at this stage of age.

Pregnant women or nursing mothers need more folic acid than others. Service to Public Health recommends that women of child-nursing or who may be pregnant should consume at least 400 micrograms of folic acid daily through dietary supplements and fortified foods, in addition to a diet containing food rich in folatina, to help prevent birth defects for their children.

With food sources of B vitamins:

B1 and B2 are commonly found in grains or foods made from wheat. B1 is also in potatoes, pork, liver, and beans. B2 is found in bread, cereals, dairy products, liver, and green leafy vegetables.

B3 is found in liver, fish, chicken, red meat, nuts, grains, and dried beans.

B5 is found in almost all foods.

B6 is found in fish, liver, pork, chicken, potatoes, bananas and beans.

B7 is made by intestinal bacteria and is also found in peanuts, liver, eggs, bananas, mushrooms, melon, and grapefruit.

B9 is in green leafy vegetables, liver, citrus fruits, mushrooms, nuts, peas, dried beans and bread cereals.

B12 is found in eggs, meat, poultry, shellfish, milk and dairy products.

Supplements that contain more B vitamins, are usually in combination with other nutrients, are sold by the grocer, grocery stores, and in the form of pills on the internet. Change the dose may be helpful.

What story lies behind?

While the diseases caused by lack of vitamins have been known for centuries, the B vitamins have been discovered are in 1900. Since then, the B vitamins have been studied to understand the effects on the human body.

Clarified the importance and functions of these vitamins, the U.S. government began to recommend of taking a daily amount to maintain good health. The current recommended intake levels are known as DRIs

The research on the possible role of some B vitamins in the prevention of cancer dates back a few decades ago.

What is known?
The limited information on vitamins B and cancer are mainly from animal studies and observational studies by epidemiologists. These types of studies are not as strong as thesis monitored clinically and should be taken with caution.

There is some evidence from observational studies by epidemiologists that the increasing the intake of vitamin B9 (folic acid) is linked to a lower risk of colon cancer, especially in people who are short of vitamins, as those who drink excessive amounts of alcohol. Evidence on the effects of breast cancer and other cancers have been mixed.

The majority of studies sull'osservazioni epidemiological has shown a link between the intake of vitamin B6 (as well as low blood levels of this vitamin) and a lower risk of colorectal cancer. Possible link with other B vitamins and cancer risk have not been studied so intensively or are designed with ambiguous results.

Only a limited number of attempts clinical supplements of B vitamins have been made. Most of these studies have reported that the supplements did not reduce the risk of cancer. In a recent study, people with more folate and vitamin B6 supplements were more likely to develop cancer and die than people taking the placebo. It 's still unclear whether taking more B vitamins helps protect against cancer or increase the risk of cancer. Some scientists have theorized that inherited differences in a person's body can use the effect of B vitamins is that these supplements help him or harm him, and that one day you can arrange to have a personal recommendation that can lower the risk of cancer.

Although some B vitamins prove to be useful in the prevention of certain types of cancer, does not mean that B vitamins would be useful in the treatment of cancer. In fact, some experts have admitted that certain B vitamins such as thiamine and folic acid may indeed help the formation of tumors. It is not proven, but caution is advised when it comes to taking large doses of these vitamins.

All this time, it is difficult to say how each nutrient or combination of nutrients affects the risk of a person in the contraction of cancer. On the other hand, the studies of a large group of people have shown that their diets are rich in vegetables and low in fat animals, meat or calories which have a lower risk with respect to the most common types of cancer. Until more is known, The American Society of Cancer, recommends eating a variety of healthy foods-with most of these coming from plant sources-rather than from supplements.

While it is better to get vitamins and minerals from foods, supplements can be ut8ili for some people. If an integrator is assumed, the best choice for most of the person is a multivitamin / mineral balanced that it contains not more than 100% of the "Daily value" of most nutrients. Pregnant women, women who are being weaned, and people who have restricted food intakes should talk to their doctors for supplements that contain higher levels of certain vitamins.

There are possible problems or complications?
This product is sold as a dietary supplement in the United States. Unlike drugs, which must be tested before they are sold?, Companies that produce supplements are not forced to test alla'Amministrazione Food and Drugs that these supplements are safe and have no effect, until they say that supplements can prevent , treat, or cure a specific disease.

Some products may not content the amount of grass or a substance as a label, and some may contain certain other ingredients (contaminants). The actual amount per dose may vary between brands and brand, from package to package. In 2007, the FDA has imposed new rules to raise the quality of the production of dietary supplements and a list of its ingredients inside. But these rules do not report the safety of ingredients or their effects on health.

Most supplements have not been tested to find out if they have contraindications to medicines, foods, or other herbs and supplements. Although some news of conflict and negative effects may be published, full studies of the contraindications are not always available. Because of these limitations, any information on adverse effects and contraindications may be considered incomplete.

The B vitamins are water soluble, which means that any excessive ingestion is accordingly disposed of in the urine. Supplements containing B vitamins are generally considered safe, but they should not be taken in high doses. Possible side effects include increased blood sugar and problems related to skin. Overdose can lead to heart problems or liver disease. Rarely, large dose supplements of vitamin B3 (niacin) can cause bluish vision, nausea, vomiting, and can give rise to ulcers. High doses of folic acid supplements can interfere with at least one chemotherapy drug therapy, methotrexate, and other similar drugs. Always tell your doctor or pharmacist about any supplements you are taking or grass,

Rely on B vitamins alone and avoiding or delaying conventional medical care for cancer may have serious consequences in terms of health.