what sources does hyaluronic acid come from?
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Hyaluronan (also called hyaluronic acid or hyaluronate) is a glycosaminoglycan distributed widely throughout connective, epithelial, and neural tissues. It is one of the chief components of the extracellular matrix, contributes significantly to cell proliferation and migration, and may also be involved in the progression of some malignant tumors.\nHyaluronan is also now a common skin care ingredient, due to its moisturizing effects. \nHyaluronan is synthesized by a class of integral membrane proteins called hyaluronan synthases, of which vertebrates have three types: HAS1, HAS2, and HAS3. These enzymes lengthen hyaluronan by repeatedly adding glucuronic acid and N-acetylglucosamine to the nascent polysaccharide.
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http://en.wikipedia.org/wiki/Cyanuric_acid
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Bleach\nsodium hyporchlorite has HCL in it\nMuritic acid
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hydrochloric acid, acetic acid (vinegar), boric acid, sulphuric acid, ascorbic acid(vitamin c) etc.
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It comes from the carbohydrates we eat.\nFor example: \n1. from honey \n2. from sugar\n3. from bread\n4. from syrups.\nIt may come also from internal sources like from liver glycogen (this word means that it can generate glucose), from lactate (through the "reverse" of glycolysis), from glycerol that comes from tri-glycerides (fats and oils), from glucogenic amino acids such as alanine. \nOne of the most beautiful and amazing metabolic web is the use and formation of "glucose"!
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pheromones.. sex hormones . it comes from males and females usaly from the sweat glands
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Lactose converting into lactic acid.
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Try the source below.
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Mostly bacteria.  Also, fiber, bile acids, etc.
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Disaccharides can be hydrolzed into important monosaccharides (such as glucose, galactoce, etc)\nGlucose is very important as a energy source, and building blocks for polysaccharides, such as glycogen (energy storage),cellulose, etc
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http://www.webmd.com/hw/skin_and_beauty/hw65255.asp
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Uric acid is a product of purine metabolism.  Purines are the nucleotides that comprise half of our genes.  The enzyme that does this is xanthine oxidase, taking xanthine and hypoxanthine as its substrates (or its starting materials).  Xanthine oxidase being predominantly in the liver, actually produces urate.  From the liver, urate travels into the blood, to the kidneys where the pH is much lower.  This acidic environment converts urate to uric acid.
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Leather\n\n- from animal skins
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Well, your question isn't all that clear, but this is what I found.  Take a look at the whole page.  This is a part of it.\n\nApiogalacturonan \n\nApiogalacturonans are present in the walls of some aquatic monocots including Lemna and Zostera. The backbone is substituted with β-D-Apif and β-D-Apif-(1,3')-β-D-Apif-(1, side chains (see right figure). The backbone of these polysaccharides is resistant to fragmentation by microbial EPGs.\n\nEnzymes that fragment HG (endo and exo polygalacturonases and lyases) are secreted by many plant pathogens. The oligogalacturonide fragments generated have been shown to induce several plant defence responses (see Plant Pathogens).
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collagen naturally occurs in the body. if you have used a beauty product and are having a reaction it was probably not the collagen.
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Paper.  Which comes from trees.\n\nBet you didn't know every time you use the bathroom you're wiping your ass with a Larch, did you?
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The extract comes from the second site below"\n\n"f you are allergic to shellfish, please consult with your physician prior to taking this product. KEEP OUT OF REACH OF CHILDREN. Do not take if pregnant or nursing."