1. Cypionate – DEPO-Testosterone Injection, for intramuscular injection, contains testosterone cypionate which is the oil-soluble 17 (beta)- cyclopentylpropionate ester of the androgenic hormone testosterone.Testosterone cypionate is a white or creamy white crystalline powder, odorless or nearly so and stable in air. It is insoluble in water, freely soluble in alcohol, chloroform, dioxane, ether, and soluble in vegetable oils. This product is the most common used in Hrt injectable when used as an indictable delivery method. It is the most mild with lest side effects of all testosterones. When this long-acting version of testosterone is injected, it becomes stored in what is known as a depot in the body, and slowly released over a short period of time. Peaking within 1-2 days after injection, the testosterone is then steadily released over the next 12 days and completely tapers out after approximately 3 weeks.
2. Enathate – Testosterone ethanate -is an anabolic steroid with extremely high anabolic and androgenic effects. It is a long acting injectable testosterone. Injections of testosterone ethanate are taken once weekly, with a dosage of 200. Testosterone Enanthate has a release time of between 8-10 days. It is typically injected once every one to three weeks, though some users opt for a twice a week frequency as well. This version of testosterone will cause the usual side effects associated with Testosterone, including: hair loss, acne, gynecomastia and eventual cessation of the body’s natural testosterone production. Many of these side effects can be associated (if not totally attributed) with the conversion of Testosterone into Dihydrotestosterone and estrogen
3. Propionate – Testosterone Propionate is the shortest estered testosterone preparation available on the market currently. It does everything you’d expect from testosterone, but anecdotally seems to promote less water retention than longer estered versions of the product.
4. Testosterone Blend (Sustanon) – There are two advantages to combining multiple esters in the same formulation as Sustanon does. Here, using multiple esters allows the fairly high total concentration of 250 mg/mL without requiring a large percentage of solubility enhancers in the vehicle. More generally, solubilities of different esters of a steroid are nearly independent of each other, so for example if a vehicle (oil plus solubility enhancers) could dissolve 100 mg/mL of one steroid ester alone or 100 mg/mL of another, it could probably dissolve 200 mg/mL total as a combination of both. This can add convenienc
Testosterone: A “male hormone” — a sex hormone produced by the testes that encourages the development of male sexual characteristics, stimulates the activity of the male secondary sex characteristics, and prevents changes in them following castration. Chemically, testosterone is 17-beta-hydroxy-4-androstene-3-one.
Testosterone is the most potent of the naturally occurring androgens. The androgens cause the development of male sex characteristics, such as a deep voice and a beard; they also strengthen muscle tone and bone mass. High levels of testosterone appear to promote good health in men, for example, lowering the risks of high blood pressure and heart attack. High testosterone levels also correlate with risky behavior. Testosterone may be given to treat medical conditions, including female (but not male) breast cancer, hypogonadism (low gonadal function) in the male, cryptorchism (nondescent of the testis into the scrotum), and menorrhagia (irregular periods).