As many other steroids, Dianobol-lab 20 has many potential side effects, but they are rare when the daily dosage is up to 20 mg. This steroid is I 7-alpha alkylated, so it can be toxic to liver when it is taken in high dosage and for a long period of time. Dianobol-lab 20 strongly converts into estrogens and in some athletes causes gynecomastia. To avoid such effects it is recommended to take such drugs as Nolvadex and Proviron. Because of androgenic component the sebaceous gland is stimulated and it can cause acne vulgaris on the face, neck, chest, back and shoulders.