As Testosterone Decanoate is no longer manufactured as a single ester base compound it is not prescribed as in low testosterone treatment plans and will only be found in testosterone blends. You will also find the compound is virtually unheard of on the black market other than in black market Sustanon 250 and Omnadren. If you happen to come across a Testosterone Decanoate product, 500mg per week would produce excellent results of a performance nature. This will also be the most testosterone many men will ever need. However, higher doses can be used if a strong level of toleration is enjoyed with a 500mg dose. 750-1,000mg per week is not uncommon doses and well tolerated by many men. However, this will increase the risk of side effects and caution is advised. The compound could also be used to combat testosterone suppression due to the use of other anabolic steroids. Some athletes prefer to rely on other steroids for their performance needs, but due to suppression they will still need some exogenous testosterone. 250mg every 7-10 days should be enough testosterone to accomplish this goal.
It should be noted that in theory if one was to consistently suppress your natural estrogen levels for a long period of time, this would negatively impact your health, including your cholesterol. Due to the ability of Letrozole- to inhibit estrogen so much, this should definitely be a concern to most users. However the research that has focused on the relationship between use of letrozole and cholesterol levels is rather inconsistent in it's findings. Many studies have concluded that the compound is detrimental to both a user's HDL and LDL cholesterol levels, while other research has found no link. Obviously individuals are best served to monitor their cholesterol while using any compound via blood tests however barring that, letrozole should simply not be run for extended periods of time if at all possible. Doing so could cause serious medical complications.
Along with the issues related to blood lipids is the fact that many users complain that their libido is dramatically reduced when using the compound. This is related to the fact that estrogen is partly responsible for the regulation of an individual's sex drive. Since Letrozole- is so potent it can often drive estrogen levels too low and this inhibits a user's libido. To avoid this users can lower dosages, but some anecdotally report that even extremely low doses of the drug can cause problems. If this is the case a less potent compound such as exemestane or anastrozole may be a more appropriate option.