250 mgs. / 1 cc. vials or preloads. Sustanon 250 is one of the most popular steroids and for good reason. It is precisely set up to give you results for up to a month after injection because each of the testosterones that make up Sustanon 250 stay active in the body for differing time periods. It gives you almost instant results that you can feel since it will hit you about 3 hours after your first injection. The reason for this is the fast acting properties of the testosterone propionate that is in it. The testosterone phenylpropionate and testosterone isocaproate will typically stay active for about 2-3 weeks each and the testosterone decanoate stays active in the body for up to a month. This combination is what gives Sustanon 250 its quick onset which continues to hit you for about 4 weeks after the last injection. This drug also degrades and tapers nicely for the same reasons. Some people will argue that Sustanon is good because since it is made up of multiple types of testosterone, that it "will hit multiple androgen receptors." This could not be further from the truth. You only have one type of androgen receptor. All steroids hit the same androgen receptor regardless of what you are taking.
Injectable steroids are injected into muscle tissue, not into the veins. They are slowly released from the muscles into the rest of the body, and may be detectable for months after last use. Injectable steroids can be oil-based or water-based. Injectable anabolic steroids which are oil-based have longer half-life than water-based steroids. Both steroid types have much longer half-lives than oral anabolic steroids. And this is proving to be a drawback for injectables as they have high probability of being detected in drug screening since their clearance times tend to be longer than orals. Athletes resolve this problem by using injectable testosterone early in the cycle then switch to orals when approaching the end of the cycle and drug testing is imminent.