Dig is right , an infection will take some time to materialize. I have unfortunately had a bad experience with an UG lab that sold "undetectable" packets. I ended up in the ER with cellulitis which turned into a septic infection. I dropped to 180lbs from 255 in under 2 weeks in the hospital. I would not inject any more than 250mg into a new site to avoid an overactive response. Also your body must metabolize anything that it cannot diffuse immediately so the lipid based suspension may cause a response.