i have come across many fakes with that same description. give it a good shake and see how it runs down the bottle. real winny will run horizontally like the ripples of sand on a beach, fake will run straight down. how long does it take untill it separates when shaken? you should take 10-20 I.U and inject it on the back of a glass and leave overnight to see how it or if it dries up, chances are it won't dry up for months and will be tacky at best. in any case it is your health and if in that much doubt i'd stay away from it and chaulk it up to a lesson learned