How to buy best quality Testosterone CAS:58-22-0 in US

Product Name:Testosterone
Other Name:Testosterone base
CAS :58-22-0
MF: C19H28O2
MW: 288.43
Purity: 99%
Package: Sample 10g/bag;100g;500g;1kg
Appearance: white crystall powder, odourless. Insoluble in water and soluble in alcohol, ether organic solvents.
USES: it can promote male genital growth and keep their normal function.


Testosterone has extremely important health effects for both men and women. Including enhancing libido, strength, immune function, fighting osteoporosis and other effects.

For Testosterone, most people know it as the primary sex hormone and anabolic steroid for men, mainly secreted by the testes. This is common sense for most people. However, few people know that in addition to the testosterone secretion by the testes, the female ovaries and human adrenal glands also secrete a small amount of testosterone, but the amount of testosterone secreted by adult men is 20 times that of adult women.

So how does Testosterone work in the human body? To understand how it works, we need to understand another keyword "androgen receptor".

What is androgen receptor?

Androgen receptor is referred to as AR, also known as NR3C4. It is a protein with a molecular weight of 120,000 Daltons, which is synthesized under the guidance of the genes of the human X chromosome. Its main function is as a DNA-binding transcription factor that regulates gene expression.

Mode of action of Testosterone and androgen receptor
1. Testosterone is transported into the cytoplasm of the target tissue cells, binds with androgens, produces a structural transformation, and enters the nucleus to bind to specific nucleotides. The combined region is called hormone response element (HRE) , and affect the duplication of certain genes to produce male hormone effects.
2. After being metabolized into serum dihydrotestosterone (DHT) in the body, it binds to the androgen receptor near the hydrocarbon end (this binding is more stable, the male hormone strength of DHT is about 2.5 times that of testosterone) to activate the androgen receptor, thereby further produce male hormones.
Through the above introduction, you can understand the basic situation of Testosterone and androgen receptor and their action forms. But there is still a question, since the human body produces Testosterone, why do many people choose to supplement Testosterone powder? This requires us to understand the normal value of testosterone in the human body.

Children: male <8.8nmol/L
Female <0.7 nmol/L
Adult: male 14~25.4nmol/L
Female 1.3~2.8nmol/L
It can be seen that in the process of human growth and development, whether male or female, the testosterone content will slowly increase with age until it reaches a normal value. However, studies have found that testosterone levels peak around the age of 20 to 30 in humans, ranging from 14 to 25.4 nmol/L for men and 1.3 to 2.8 nmol/L for women. Then it declines with age, at a rate of 1% per year, and by the time a person is 80, his testosterone may only be 20% of what he was at 25.

The body produces Testosterone on its own, but for those with testosterone deficiency, those whose testosterone levels decrease with age, and for bodybuilders who need Testosterone supplementation to increase strength, Testosterone supplementation is often needed to maintain health or increase strength.

With the development of science and technology, synthetic Testosterone powder was manufactured, originally used to supplement the symptoms of insufficient autologous secretion or no natural secretion of testosterone, so as to maintain the normal level of testosterone in the blood. In recent years, after a series of studies, it has been found that synthetic Testosterone powder can play a huge role in bodybuilding. It increases muscle size and strength while improving bone growth and strength. Therefore, synthetic Testosterone powder is widely used in the field of bodybuilding.

Through the above introduction, you can understand the mechanism of action of Testosterone and androgen receptor. For the human body, lack of Testosterone will cause many problems. If the body lacks Testosterone, then it can ensure the health of the body through an appropriate amount of synthetic Testosterone powder.