Gushcrop is an online peddler of controlled medical substances. Usually in a real world you would have to go to a doctor, get a prescription after paying substantially and then get these substances. But lot of people are now looking online for such things and GushCrop (Gush Crop) is one of them.
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I would never recommend such things but there is always a grey market and people have a tendency to use such sources. All I would say is, be very careful of such things and exercise good judgement.