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Overview

A vitamin is an organic compound required as a nutrient in tiny amounts by an organism. A compound is called a vitamin when it cannot be synthesized in sufficient quantities by an organism, and must be obtained from the diet. Thus, the term is conditional both on the circumstances and the particular organism. For example, ascorbic acid functions as vitamin C for some animals but not others, and vitamins D and K are required in the human diet only in certain circumstances.

Vitamins are classified by their biological and chemical activity, not their structure. Thus, each "vitamin" actually refers to a number of vitamer compounds, which form a set of distinct chemical compounds that show the biological activity of a particular vitamin. Such a set of chemicals are grouped under an alphabetized vitamin "generic descriptor" title, such as "vitamin A," which (for example) includes retinal, retinol, and many carotenoids. Vitamers are often inter-convertible in the body. The term vitamin does not include other essential nutrients such as dietary minerals, essential fatty acids, or essential amino acids, nor does it encompass the large number of other nutrients that promote health but are otherwise required less often.

Tuesday, October 21, 2008

Make a Plan Before You Choose a Penis Enlargement Product

Most of men usually dream of graeren penis. You must admit. If you are in your youth, you can have your first notice was always graer Penis. You may find that there are many friends of you with graer penis than you. She began to worry them, especially you are told by your company that you had graeren penis, the greater your sexual ability was. So from that moment on, you can not help the search for a method to Resize your penis. Have you gone through it?

In recent years, there are all kinds of penis enlargement sites on the internet and a lot Penisvergraerung products on the market. You just have to do a search to see there are hundreds of websites out there. But this can be very overwhelming for any new in penis enlargement. They all claim to make your penis longer and thicker in weeks, but, as you order in the quality of pages of the fraud. I suggest you can opt for some review sites. They can help you make the best Penisvergraerung programs on the Internet and compare them against each other to find out which pages pass their rigorous review process to assess their best penis enlargement product.

Set yourself a target before you sign up for a Product. There are too many methods are waiting for you to use. If you are not only a method that you can not prove it is effective to you. It's wise to know your needs. Graere you want a thick, or two years from now, okay? Are the profits must be permanently or is short enough? There is no method that gives you everything you want whenever you want, and it goes without saying that there is no free lunch. All gains come at a cost. Sometimes this cost is financial. More often the trade-off is the expense of time, effort and, occasionally, your health.

Besides the customer support and consumer feedback is very important for you. With this information you can easily find out which product is best for you.

 

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