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What does ASA stand for?

ASA stands for Acid Ascorbic Acid

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ascorbic acid, l-ascorbic acid vitamin c, called also cevitamic acid; a substance found in many fruits and vegetables, especially citrus fruits, such as oranges and lemons, and tomatoes. It is synthesized by most animal species, except primates, guinea pigs, fruit bats and some birds and fish, and so is not a dietary requirement in ordinary circumstances except for the species named.
When I take anything that has citric acid or ascorbic acid, like vitamins, food supplements, perscription medicines, etc. , it always bives me a really bad rash on my bottom.
Citric acid and ascorbic acid are two similar substances that occur naturally in fruits and vegetables, especially citrus fruits such as lemons and limes. Both acids have nutritional benefits, and they're commonly used in food manufacturing and as a preservative, but there are several differences between the two compounds, including a variation in flavor.
Citric acid is a tricarboxylic acid and is classified as a weak organic acid. Ascorbic acid is considered a carboxylic acid. According to Dr. Murli Dharmadhikari of Iowa State University, sorbic acid is a straight-chain unsaturated fatty acid that is highly reactive. It is often reacted with potassium to produce potassium salt for commercial use.
People naturally assume that Vitamin C is all about ascorbic acid and, in turn, would imagine that since Vitamin C is usually derived and obtained from citrus fruits, it is also all about citric acid. The main thing that should be understood is that citrus fruits can offer both ascorbic acid and citric acid, except that Vitamin C can only be from ascorbic acid. Here is another scenario: a lemon is squeezed, and you now have your daily dose of Vitamin C. Right? Let’s find out the answer to that. What is Ascorbic Acid? Ascorbic acid.
Sources Of Ascorbic Acid Ascorbic acid is mostly derived from fruits and vegetables. Almost every known edible fruit and vegetable contains at least a small amount of ascorbic acid. Some of these fruits contain comparatively high amounts of the vitamin and they include citrus fruits such as orange and lemon, pineapple, mango, watermelon, strawberries. Vegetable sources of ascorbic acid are, among others, red and green peppers, tomatoes and tomato juice, cabbage, leafy greens and spinach.
Ascorbic acid: you’ve heard of it, but do you know what it really is? Here’s what you probably don’t know about ascorbic acid and vitamin C!
Citric acid and ascorbic acid are common ingredients in a variety of products. They’re also found in some of the same foods, such as citrus fruits. But they’re very distinct acids with specialized roles to play in your health. Citric acid fills a key spot in energy production, while ascorbic acid’s antioxidant action protects cells throughout your body.
It is an antiscorbutic product. On exposure to air and light it gradually darkens. In the dry state it is reasonably stable in air, but in solution it rapidly oxidizes. Ascorbic Acid is freely soluble in water; sparingly soluble in alcohol; insoluble in chloroform, ether, and benzene. The chemical name of Ascorbic Acid is L-ascorbic acid. The molecular formula is C 6H 80 6 and the molecular weight is 176.