I wasn't talking about nolva!
The question is still here: why SD lead to a so deep suppression if its profile is close to something like anavar or winstrol(no aromatization,no progestational activity and low androgenic potential).
winstrol will shut you down....
ALTERATION OF HORMONE LEVELS IN NORMAL MALES GIVEN THE ANABOLIC STEROID STANOZOLOL
M. SMALL 1 G. H. BEASTALL 1 C. G. SEMPLE 1 R. A. COWAN 1 C. D. FORBES 1
1 University Department of Medicine and Pathological Biochemistry, Royal Infirmary, Glasgow
Correspondence: Dr M. Small, University Department of Medicine, Royal Infirmary, 10 Alexandra Parade, Glasgow G31 2ER, UK.
Copyright 1984 Blackwell Publishing Ltd
ABSTRACT
Abstract REFERENCES
Anabolic steroids have widespread metabolic effects but, to date, their proven clinical indications have been limited. Recently the 17 α-alkylated steroid, stanozolol, has been shown to be of value in a variety of commonly occurring vascular diseases. Its endocrine effects have received little attention and we have investigated the effect of administering a 14 d course of stanozolol (10 mg orally per day) on a variety of important hormonal pathways in nine healthy male subjects. Significant changes occurred as follows: a 55% reduction in serum testosterone levels was noted and was accompanied by reductions in 'derived' free testosterone, sex hormone binding globulin and LH levels; total T4 and T3 levels fell in association with a decrease in thyroxine binding globulin, but no alteration was detected in TSH or free T4 levels. Changes in vitamin D status, with falls in 25-hydroxycholecalciferol and vitamin D binding globulin were also observed. These effects were reversible on stopping treatment. Stanozolol therapy therefore leads to a number of hormonal changes, probably by an action at both pituitary and hepatic levels.
and again these cause shut down at higher levels,... minimally with anavar at 10mg per day but ....... still the interaction with the 5a reductase enzyme i believe has a lot to do with it,.