Vitamin A: The Forgotten Bodybuilding Nutrient

[AGR]

Tämä saattaa olla vanha linkki ja muutenkin vanhaa tuttua tietoa. Mutta silti ihan mielenkiintoinen teksti A-vitamiinista. En löytänyt haulla ainakaan vastaavaa joten laitan sen tänne omaan thrediin. Silläkin riskillä, että muumioita satelee.

http://www.westonaprice.org/men/vitaminabodybuilding.html

Pari lainausta:

In adults, vitamin A toxicity has been reported in Arctic explorers who developed drowsiness, irritability, headaches and vomiting, with subsequent peeling of the skin, within a few hours of ingesting several million units of vitamin A from polar bear or seal liver. These symptoms cleared up with discontinuation of the vitamin A rich food. Other than this unusual example, however, only vitamin A from "megavitamin tablets containing vitamin A. . . when taken for a long time" has induced acute toxicity, that is, 100,000 IU synthetic vitamin A per day taken for many months. Unless you are an Arctic explorer, it is very difficult to develop vitamin A toxicity from food.

Exercises that elicit a high demand for testosterone, such as squats and deadlifts, are often recommended for muscle growth, but without vitamin A the body cannot meet that demand for testosterone.

Vitamin A is not only depleted by a high intake of protein, but it is also necessary for the synthesis of new protein, which is the goal of the bodybuilder.

Yet this nutrient is essential to muscle-building and may be the bodybuilder's most potent weapon. Vitamin A is necessary for the utilization of protein and the production of testosterone and other growth factors. In fact, one human study, discussed below, found the administration of vitamin A and iron to have results equivalent to the administration of testosterone itself.

 

[Anssi Manninen]

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