Archive for the ‘Vitamin and Minerals’ Category

Vitamins and Minerals for Health (Part 2)

Tuesday, March 30th, 2010

vitamins and mineralsHow Much Do I Need?
You might think that all you need to get enough vitamins and minerals is to take a multivitamin once a day. Unfortunately it is not so simple. The amount of micronutrients in many of these pills are based on the recommended dietary amount (in English Recommended Dietary Allowance or RDA) established by the U.S. government.

The problem is that the amount established by the RDA does not represent the amount required for HIV-positive people, but that is the minimum amount needed by healthy people to prevent deficiencies.

HIV disease and some medications may decrease the levels of some micronutrients. One study showed that HIV-positive people need 6 to 25 times more of some nutrients. Still, a high potency multivitamin is a good way to get basic micronutrients.

What nutrients are important?
There has been insufficient research in HIV-positive people on this issue. However, one study showed that a multivitamin supplement had significant benefits in pregnant women in Tanzania. In addition, many nutrients interact with each other. Most nutritionists believe in designing a comprehensive program of supplements.

People with HIV may benefit from taking supplements of vitamins and minerals as follows:

* B Vitamins: Vitamin B1 (thiamin), vitamin B2 (riboflavin), vitamin B6 (pyridoxine), vitamin B12 (cobalamin) and folate (folic acid).
* Antioxidants, including beta carotene (the body breaks down beta-carotene to vitamin A), selenium, vitamin E (tocopherol) and vitamin C.
* Magnesium and Zinc

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Vitamins and Minerals for Health (Part 1)

Monday, March 29th, 2010

vitamins and mineralsWHY ARE VITAMINS AND MINERALS IMPORTANT?

Vitamins and minerals are also called micronutrients. The body uses them in small amounts to facilitate chemical reactions that cells need to live. Different nutrients affect digestion, nervous system, thought and other body functions.

Micronutrients are found in many foods. Healthy people can get enough vitamins and minerals from food. People with HIV or other diseases need more micronutrients to repair and heal cells. In addition, many medications can cause a deficiency of different nutrients.

WHAT ARE ANTIOXIDANTS?

Some molecules in the body are in a state known as rust, also are called free radicals. React easily with other molecules and can damage cells. High levels of radicals seem to cause much of the damage associated with aging.

Free radicals are products of normal body chemistry. Antioxidants are molecules that stop the free radical reaction with other molecules and thus limit the damage they cause. Several nutrients are antioxidants.

Antioxidants are important for people with HIV since HIV infection increases the levels of free radicals. In addition, free radicals can increase the activity of HIV. High levels of antioxidants can slow the virus and help repair the damage it causes.

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What Is Fluoride?

Thursday, March 11th, 2010

What Is Fluoride?

Since about 50 years ago showed that the decay could be controlled with the use of fluoride, many preparations have appeared that contain it. Some are for professional use and some not.

Fluoride has three very beneficial effects on teeth:

- Increases the resistance of enamel: Applying fluoride on the teeth, it reacts with calcium in them, forming calcium fluoride. In this way, the fluorine reacts with the crystals of tooth enamel (hydroxyapatite), resulting in a compound that greatly increases the resistance of enamel.

- It helps remineralisation: Fluoride contributes to the remineralization of the tooth, by encouraging entry into the structure of calcium and phosphate ions. This is because the fluoride has negative charge and attracts the calcium and phosphate whose charge is positive.

- Has antibacterial action: Fluoride has antibacterial action attacking the bacteria that colonize the tooth surface.

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