Three others did stop testosterone in response to the PSA bounce, two of whom had negative prostate biopsies. In-vitro experiments have shown that prostate cancer cells fail to proliferate in the absence of testosterone; once testosterone is introduced, an initial proliferative response is observed followed by a plateau after a certain testosterone concentration is reached. From a clinical standpoint, it dictates that there is a testosterone threshold beyond which prostate cells (benign or malignant) cease responding. However, an analysis of Huggins' original paper reveals that this assumption was based on a single patient who was cancer and androgen therapy naïve at study onset. Increasing patient age and increasing duration of prior exogenous testosterone use both significantly reduced the likelihood of reaching the 5 million TMSC benchmark. In this population, exogenous testosterone was stopped and combination high-dose hCG and SERM therapy was initiated. Older meta-analyses from 2007 and 2005 similarly demonstrated no impact of testosterone on lipid profiles.312, 327 The age-old questions spanning around the fitness industry in relation to hormones and workout timing are;— Should you train in the morning or evening for better testosterone levels? Short bouts of intense exercise can cause sharp increases in total testosterone, free testosterone, DHEA, growth hormone, and dihydrotestosterone129–131. Though this isn’t always the case, in one study it was noted that after adjusting BMI, vegans, vegetarians, and meat-eaters don’t really differ much in terms of testosterone levels. In 2001, the FDA performed an analysis of internet-purchased, compounded products following reports of contamination, poor compounding processes, and product toxicity.406, 407 Among 29 product samples analyzed, which included testosterone among multiple medications, 31% demonstrated sub-potency ranging from 59-89% below target dose. In contrast to commercial pharmaceutical manufacturing, which is regulated by the FDA, compounded medications are regulated by state laws and, therefore, vary significantly from one region to another.405 While testosterone gels and creams are the most commonly used forms of compounded testosterone therapies and are routinely less expensive than branded forms of testosterone, these preparations by individual pharmacies occur without direct FDA oversight and approval. + FDA approved for use in males with hypogonadotropic hypogonadism and pediatric patients with cryptorchidism. HCG is an LH analog that is usually prescribed to treat a deficiency in LH production. However, despite these limitations, several studies provide important insights into the impact of SERMs, AIs, and hCG on spermatogenesis. The overall quantity and quality of studies investigating the use of these alternative agents in males are limited. Taylor et al. reported that clomiphene citrate has outstanding biochemical and clinical efficacy, with increases in serum testosterone similar to those for testosterone gel.400 Additionally, these investigators found that clomiphene has a favorable side effect profile and is less expensive than testosterone gel. SERMs are oral agents that block E2 feedback resulting in increased LH secretion. Finally, hCG therapy alone or in combination with SERMs has been shown to facilitate recovery of testosterone production and spermatogenesis in men with a prior history of exogenous testosterone use333 or anabolic steroid abuse.334 Return of sperm to the ejaculate in these men can be highly variable, taking up to two years after cessation of exogenous testosterone in some cases, with some men never experiencing return of sperm.334 For this reason, alternative therapies, including SERMs, AIs, and hCG, are commonly used to promote the endogenous production of testosterone. More recently, a study evaluating the amount of residual testosterone identified on laundered clothing from men using an axilla-applied testosterone liquid reported the presence of 13% of a single axilla dose on 10x10 cm clothing samples.393 After laundering the clothing with various other materials, as much as 5.8% of a standard dose of one axilla was transferred to other garments. Normal sperm production depends on a functionally intact hypothalamic-pituitary-gonadal axis with normal secretion of pituitary LH and FSH to support intratesticular testosterone production and spermatogenesis. The target levels suggested here are physiological (eugonadal) not supraphysiological levels, and the Panel found no data to support the argument for dose escalation into the supraphysiological range in the pursuit of greater efficacy. It also helps to lower blood sugar and boosts fertility and testosterone levels in men. A study in the Journal of Clinical Endocrinology and Metabolism demonstrated that even in frail elderly men a testosterone increase improves physical function, body composition, and quality of life. Dr. Andrew Weil, M.D., founder and director of the Andrew Weil Center for Integrative Medicine at the University of Arizona states that, "Studies suggest that Tribulus Terrestris may have a positive impact on testosterone levels and sexual function in men. The Wolfson Berg supplement is made from a combination of ingredients that can increase testosterone production in the body. This is a powerful testosterone supplement said to be designed specifically for men with low testosterone levels.
