First of all, Deca Durabolin (and Nandrolone in general) doesn't produce many estrogenic or androgenic side effects. This is because Deca Durabolin has a very low rate of aromatization (conversion to estrogen via the aromatase enzyme), roughly equal to 20% the rate of Testosterone. Deca will aromatize in higher dosages, but not at the rate of testosterone’s or other high androgenic compounds. This drug can be used for cutting or for bulking. Athletes have stacked it with virtually every drug. It is a good base drug on any cycle. Deca is said to have the best effect to side effect ratio of any other steroid.
Women use this drug but only in very low dosages, 25mg per week. Deca has been established as a great soother of sore joints and tendons. Athletes report that sore shoulders, knees, and/or elbows are somehow without pain on the Deca cycle. This may be substantiated by proving it reduces the amount of cortisol getting into muscle tissue during the cycle. Deca also dramatically improves nitrogen retention and recuperation time between workouts. Deca has shown up positive on more steroid tests than any other steroid. This is due to the fact that so many athletes use it, and that it stays in the system at a detectable level for up to a year. The higher the fat content of the user, the longer it stays in your system. Deca can be active from 10-14 days after injection, but weekly injections of 300-600 mgs are common for men. Deca, or more precisely Nandrolone Decanoate, is commonly counterfeited.
Endocrine and Metabolic:
Endocrine side effects noted during exogenous administration of anabolic steroids have included inhibition of endogenous testosterone release by means of feedback inhibition of pituitary luteinizing hormone (LH). Large doses of exogenous anabolic steroids may suppress spermatogenesis through inhibition of pituitary follicle stimulating hormone (FSH). The androgenic activity of anabolic steroids may decrease levels of thyroid-binding globulin and result in decreased total T4 serum levels and increased resin uptake of T3 and T4. Free thyroid hormone levels remain unchanged and there is no clinical evidence of thyroid dysfunction.
Metabolic effects occurring during anabolic steroid therapy in immobilized patients or those with metastatic breast disease have included osteolytic-induced hyperglycemia. Anabolic steroids affect electrolyte balance, nitrogen retention, and urinary calcium excretion. Edema, with and without congestive heart failure, has occurred. Decreased glucose tolerance requiring adjustments in hyperglycemia control has been noted in diabetic patients. Significant increases in low density lipoproteins (LDL) and decreases in high density lipoproteins (HDL) have occurred.