Since collagen is so important in our body, it may cause problem by collagen deficiencies. In fact, there are some genetic diseases that are associated with collagen deficiencies. For example, osteogenesis imperfect, commonly referred to as brittle bone disease, results from a significantly decreased level of collagen. It can also result from the presence of collagen that is of lower quality than normal.  Quality standard ITEM SPECIFICATION FREQUENCY TEST METHOD 1.Appearance white or off-white powder Every lot Sensory test 2.Odor No objectional odor Every lot Sensory test 3.Sieve anlysis 90%pass 80mesh Every lot Sieving by 80mesh 4. Protein content 90%min Every lot GB 5009.5 5.AMW 1000Dmax Every year GB/T 22729 6.PH value 5.0-7.0 Every lot QB 2732-2005 7.Loss on drying 5%max Every lot GB/T 5009.3 8.Ash 2%max Every lot GB/T 5009.4 9.Microbiology-Aerobic bacterial count-Yeast

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