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While this might indicate a true difference compared with testosterone, candy96.fun it might also be attributed to the relatively low dosages used and small samples sizes that make the research liable to type II statistical errors (a ‘false negative’). Similar changes are seen in men receiving supraphysiological dosages (200–600 mg weekly) of testosterone enanthate (15, 37, 118, 119), although not all trials show a statistically significant decrease (34, 120, 121). While not seen in every clinical trial, treatment of hypogonadal men with testosterone therapy reduces circulating HDL-cholesterol (117). Dyslipidemia, an imbalance in these lipoproteins, is recognized as an important risk factor for CVD, and treatment thereof forms one of the cornerstones of primary and secondary CVD prevention. The collective increase in these serum markers should thus be interpreted as a sign of liver damage, even in the presence of concomitant muscular exercise. The HAARLEM study also found no (sub)acute clinical signs of liver damage despite 67% of subjects reporting the use of oral AAS (39).
AAS users also self-medicate with these drugs to either prevent gynecomastia from developing or to reduce the size of existing gynecomastia. Such practice should be discouraged because it is illogical and produces possible side effects such as cardiac abnormalities or arrhythmia. As such, it seems reasonable to conclude that an absolute excess of estrogenic action causes the development of gynecomastia during AAS use, regardless of its relative action compared with androgens.
AAS such as testosterone also increase the risk of cardiovascular disease or coronary artery disease. There is also the risk that an intimate partner or child may come in contact with the application site and inadvertently dose themselves; children and women are highly sensitive to testosterone and can develop unintended masculinization and health effects, even from small doses. Examples of notable designer steroids include 1-testosterone (dihydroboldenone), methasterone, trenbolone enanthate, desoxymethyltestosterone, tetrahydrogestrinone, and methylstenbolone. "Among 12- to 17-year-old boys, use of steroids and similar drugs jumped 25 percent from 1999 to 2000, with 20 percent saying they use them for looks rather than sports, a study by insurer Blue Cross Blue Shield found." Another study found that non-medical use of AAS among college students was at or less than 1%.
A 2005 review determined that some, but not all, randomized controlled studies have found that AAS use correlates with hypomania and increased aggressiveness, but pointed out that attempts to determine whether AAS use triggers violent behavior have failed, primarily because of high rates of non-participation. Large-scale long-term studies of psychiatric effects on AAS users are not currently available. Mood disturbances (e.g. depression, hypo-mania, psychotic features) are likely to be dose- and drug-dependent, but AAS dependence or withdrawal effects seem to occur only in a small number of AAS users.
In particular, an association between testosterone therapy and prostate cancer was quickly drawn based on animal experiments and limited case studies (81). Thus, whereas testosterone’s actions might be amplified in tissues expressing 5α-reductase, nandrolone’s actions might be diminished (21). While the effectiveness of 5α-reductase inhibitors is clear in clinical practice (75), their use in the context of high dosages of testosterone and/or other AAS is unproven and dubious at best.
Sex steroid-induced suppression of spermatogenesis reduces testicular volume by 16.5–30.0% (176, 182, 183). There was no association between the duration of the AAS cycle and the degree of suppression of spermatogenesis. However, only two-thirds of subjects were azoo- or oligozoospermic at the end of their cycle (176). While the addition of a progestin leads to almost undetectable gonadotropin levels, and consequently to azoospermia or severe oligozoospermia in the vast majority of men, a small percentage of men remain potentially fertile (183, 184). Interestingly, even a dosage that is roughly twice that of TRT (200 mg testosterone enanthate weekly) only partially suppresses LH (-66.7%) and FSH (-62.5%) and, indeed, leads to azoospermia in only about two out of three men (182).
It is appealing to speculate that a very high (lean) body mass, perhaps in combination with very high dietary protein intake (as is common in this population), shapes a permissive environment for the development of FSGS by chronic AAS use. One of the patients resumed AAS use and subsequently developed progressive renal insufficiency and an increase in proteinuria. The remaining seven patients either stabilized or showed a decrease in serum creatinine levels and proteinuria after starting medical treatment (in the form of ACE inhibitors, ARBs, and/or renin inhibitors) and stopping AAS use.
Conversely, certain 17α-alkylated AAS like methyltestosterone are 5α-reduced and potentiated in androgenic tissues similarly to testosterone. 19-Nortestosterone derivatives like nandrolone can be metabolized by 5α-reductase similarly to testosterone, but 5α-reduced metabolites of 19-nortestosterone derivatives (e.g., 5α-dihydronandrolone) tend to have reduced activity as AR agonists, resulting in reduced androgenic activity in tissues that express 5α-reductase. In contrast to testosterone, DHT and other 4,5α-dihydrogenated AAS are already 5α-reduced, and for this reason, cannot be potentiated in androgenic tissues. Testosterone can be robustly converted by 5α-reductase into DHT in so-called androgenic tissues such as skin, scalp, prostate, and seminal vesicles, but not in muscle or bone, where 5α-reductase either is not expressed or is only minimally expressed.
The higher percentage of self-reported acne might also reflect an occurrence of this side effect at other points in time during AAS use, which would have been missed by visual examination at the end of a cycle. The discrepancy can be largely ascribed to AAS users classifying a few pimples as acne. Additionally, androgens are thought to play a causal role in altered follicular keratinisation, although direct evidence is lacking (64). One author reported dramatic hypertrophy of the sebaceous glands in skin biopsies taken from AAS users (63).
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