SUSTANON is an oil based solution of 4 testosterone esters for IM injection including those of short, intermediate, and long half-lives. Serum testosterone will rapidly increase within 24 hours of IM administration and remain elevated for 7 – 10 days. Sustanon 250 is suitable for the treatment of hypogonadism and other disorders related to androgen deficiency. Sustanon 250 has both anabolic and androgenic effects. Testosterone supplementation has been demonstrated to increase strength and growth of new muscle tissue, frequently with increases in libido.