As aforementioned, Primobolan has shown only insignificant side effects, particularly when used in reasonable proportions. That is not to say the steroid is so safe as to skip a post cycle therapy, or to not include an adequate cycle aid in your plans. A handful of studies have indicated that both forms of Primo have significant effects on the liver and in the production of both FSH and LH. Also, like most other DHT based hormones, it does cause hair loss—an effect on the scalp. However, compared to other performance-enhancement and modeling steroids, it shows less severe side effects, meaning at the proper dosage, the steroid can prove to be more effective and efficient than detrimental.