7 Major Differences Between Test E and Test C

The main sex hormone and anabolic steroid are both testosterone. Mammals, reptiles, birds, and other vertebrates all contain the hormone.

Male reproductive organs and secondary sexual traits like muscles and pubic hair are both developed as a result of testosterone. Additionally, it guards against osteoporosis.

The use of testosterone treatment in bodybuilding is essential. Many bodybuilders think about getting synthetic testosterone shots to increase muscle growth.

Test E and Test C are the two primary varieties of esterified testosterone variations, and they lengthen the half-life. These testosterone injections do not appear to significantly increase testosterone.

What really separates Test E from Test C, then? Test E’s half-life is 10.5 days, while Test C’s half-life is 12 days. The body retains all testosterone injections for three weeks.

The number of carbon compounds is a further indicator of the differences. According to research, Test C has compounds with 8 carbons, whereas Test E has compounds with 7 carbons.

The differences between Test E and Test C are explained in great detail in this article. Spend some time reading through to learn more about these testosterone injections.

What is test E?

A more well-known androgen known as Test E, or testosterone enanthate, is offered under numerous brand names, including Delatestryl, Testro, Testoviron, Testostroval, etc. Low testosterone levels, which are needed for weight gain and weight loss muscular bulk, depression, erectile dysfunction, and gynecological side effects including man boobs are treated with it as an androgenic and anabolic steroid. Test E is crucial for increasing both male sexual traits and muscle growth. It is now widely used by bodybuilders to quicken recovery and burn fat.

test E
Figure 1: Test E.

Additionally, Test E has a half-life of about 7 to 10 days, allowing for once or twice weekly injections. Therefore, it is more suited for medical and bodybuilding objectives, especially for people who find regular injections uncomfortable.

What is test C?

Another form of esterified testosterone with a 12-day half-life is Test C, or testosterone cypionate. Despite having a different chemical structure than Test E, it is an equivalent to Test E. Additionally, the longer half-life lessens the need for injections on a regular basis. However, the origin of this commodity is global. Additionally, hypogonadism, which led to low testosterone levels, can be treated with it.

test C
Figure 2: Test C

The typical Test C dosage for beginners is 400 to 500 mg during a 12-week cycle. Three times each week are required for the injections. However, individuals who have had Test C in the past may receive an enhanced dose of 600 or 700 mg over the course of a 12-week cycle. A lower dose of Test C, 200 mg, can also be used when stacking with other anabolic substances like Winstrol and human growth hormone (HGH).

Similarities Between Test E and Test C

  • Types of testosterone include Test E and Test C.
  • They are esters of steroids.
  • Both medications are given once a week or as needed.
  • They cause muscles to retain more nitrogen, which causes more protein to accumulate.
  • Both contribute to gaining muscular mass and strengthening muscles.
  • They have negative effects on the activity of the estrogen.

key Main Differences between Test E and Test C

  • Test C’s half-life is roughly 12 days, compared to Test E’s half-life of about 11 days. This suggests that, in comparison to test e, test c typically involves fewer injection numbers.
  • Test C stands for Testosterone Cypionate, while Test E stands for Testosterone Enanthate.
  • A steroid ester called Test C is used to increase athletic performance, and Test E is used to increase muscle strength and promote bodybuilding.
  • While Test C is only an American product, Test E is a universal product. This is the reason test e is more well-liked than test c.
  • While Test C injection causes the patient to bloat, Test E produces skin irritation where it is injected.
  • Test C contains a low concentration of testosterone steroids per gram, but Test E has a larger concentration.
  • Test C is less popular than Test E in terms of popularity
  • Test E’s molecular weight is lower than Test C’s, which is heavier.
  • While Test C has an American origin, Test E has a worldwide origin.
  • Test C features an 8 carbon ester, compared to 7 carbon ester in Test E.


What is testosterone C used for?

Men who produce insufficient amounts of the natural hormone called testosterone are treated with this drug. Many typical male functions, such as the growth and development of the genitalia, muscles, and bones, depend on testosterone. Boys’ normal sexual development (puberty) is also aided by it.

Which testosterone ester is best?

The ester we prefer to use for Gold Standard TRT is testosterone cypionate. In the USA, where Testosterone Deficiency and TRT are more prevalent and well acknowledged, it is also the ester of choice.

How long does test cypionate take to kick in?

Results. Effects on sexual attraction start to take effect after three weeks and plateau at six weeks, with no additional increases anticipated after that. Ejaculatory/erection changes could take up to six months. The effects on life quality start to show after 3–4 weeks, but it takes longer to see the full advantages.

Which testosterone is faster?

Testosterone Propionate, a different frequently used ester, has a quicker action. It usually reaches its blood-level peak in a matter of hours and can be completely digested in three days.


In general, testosterone esters like Test E and Test C are used as performance-enhancing supplements. In actuality, the half-life of Test E and Test C is the only distinction between them. Additionally, the benefits and adverse effects of the two esters are identical, with the mechanism of action enhancing muscle protein synthesis.