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I myself am just getting over a bout of inflammation from ingesting 1g of creatine, three times, over a week’s period, two weeks ago.. I’m just glad I thought better of taking the 3-5g suggested dose, after my dalliance with collagen powder ended in a similar, failed, fashion.. 
..it would probably have gone on for longer, but I found one of my herbal tinctures in a kitchen drawer which decimates inflammation, and took some. 