Since people discovered the effects of testosterone and extracted it for their own use, a number of derivatives based on testosterone have been developed. These derivatives of testosterone are classified as anabolic steroids (AAS). They all have similar effects to testosterone, and in some ways are better than testosterone.
Testosterone and AAS have been used by Bodybuilders for a long time, so what are the most commonly used AAS among the many, and which is the most popular one for Bodybuilders?

The most commonly used AAS by Bodybuilders
Using a survey of 626 bodybuilders, we put together a table shown below. As can be seen from the table, the most commonly used AAS by Bodybuilder are: Stanozolol, Testoterone, Anavar, Dianabol, Anadrol, Deca-Durabolin, Sustanon, Equipose, Trenbolone, Primobolan, Durabolin. Among them, the AAS most used by male bodybuilders is Stanozolol (winstrol) and Anavar (Oxandrolone) is the most used by female bodybuilders.

The above data is basically consistent with our common cognition.

Stanozolol (winstrol)
Stanozolol is a derivative of DHT that can be used in bodybuilding to greatly increase strength and achieve a dry, hard muscular appearance. An important stat for whether an AAS is worth choosing for bodybuilders is its anabolic activity. The anabolic activity of Stanozolol is 320% of that of testosterone, and the ratio of its anabolic activity to its androgen activity is 30:1. 30:1 is a very good number in AAS. This is probably one of the main reasons why Stanozolol is the most popular AAS.
Anavar (Oxandrolone)
Anavar is the most popular AAS among female bodybuilders because it is the least androgenic of the existing AAS. Studies have shown that the side effects of masculinization are 5% of testosterone. This minimizes the risk of male side effects in women, so Anavar is the first choice for women to use AAS in bodybuilder.
Testoterone
Testoterone is the foundation of all AAS. Testoterone is used by many male bodybuilders as a stack when using other AAS. Here we can see that a larger percentage of female bodybuilders are already using it. Testoterone is the one that is easiest to see when a person is beginning to try using AAS. For female bodybuilders, there is a lot to be gained from developing a good cycle and dosage, and taking care to control side effects.

AAS causes aggression and psychological distress
AAS(anabolic androgenic steroids) are both derivatives of testosterone and testosterone, so AAS are androgens. Androgen stands for male sex hormone, and when you describe someone who is full of male sex hormone, you can imagine aggression as well as muscle and strength.
Research on aggression and psychological distress associated with the use of AAS in bodybuilder could help identify individuals and groups most sensitive to the negative and psychological consequences of AAS use to facilitate the development of targeted interventions.
For AAS users, most of the data is on men, and there is a significant lack of data on female bodybuilder studies.
Participants included 206 Bodybuilders using AAS (58.3% female) with a history of regular AAS use for at least 6 months prior to participating in the data collection. Participants ranged in age from 14 to 56 years (M=26.89,SD=7.12 years).

In the study, Cronbach for physical aggression, verbal aggression, hostility, and anger were 0.73, 0.70, 0.77, and 0.69, respectively. Cronbach coefficient of psychological distress was 0.82.
Female and male AAS users in the study averaged 4.37 hours and 6.19 hours of weight training per week at the gym. The mean duration of AAS use was 1.51 years for men and 1.19 years for women.
The experimental results show that:
The proportion of highly aggressive and moderate psychological distress users was 7.63%; The male accounted for 91.67% and the female accounted for 8.33%.
The proportion of moderate aggression and moderate psychological distress was 18.645; Males accounted for 80.42% and females accounted for 19.58%.
The proportion of moderate aggression and mild psychological distress was 11.71%; Males accounted for 32.46% and females accounted for 67.54%.
The proportion of mild aggression and moderate psychological distress was 11.62%; Males account for 30 percent and females for 70 percent.
Low aggression and mild psychological distress accounted for 39.06% of the users; The male accounted for 10.51% and the female accounted for 89.49%.
These data may be influenced by AAS use methods (e.g., bulking, cycling, and stacking) and individual constitution. However, the experimental results still showed that a large number of exogenous AAS increased the occurrence of aggression and psychological distress in bodybuilder. When using AAS, bodybuilder should follow the doctor's advice, control the dosage and cycle length, etc., so as to use AAS more safely.

In the bodybuilding space, hCG is increasingly used in combination with various AAS cycles.
When exogenous AAS enters a man's body, the natural negative feedback loop causes the body to shut down its own testosterone production by turning off the hypothalamic-pituitary-gonadal axis (HPGA). This can lead to testicular atrophy, etc. hCG is commonly used to maintain and restore testicular size and normal testosterone production during and after a steroid cycle.
High levels of AAS that mimic the body's natural testosterone trigger the hypothalamus to shut down its production of gonadotropin-releasing hormone (GnRH) from the hypothalamus. Without GnRH, the pituitary gland stops releasing luteinizing hormone (LH).LH usually travels from the pituitary through the bloodstream to the testes, where it triggers the production and release of testosterone. Without LH, the testes stop producing testosterone.
In male bodybuilder, hCG helps restore and maintain testosterone production in the testes by mimicking LH and triggering testosterone production and release.

How to prepare and inject your hcg dosage is described in detail below
1. Prepare hCG power, 5000IU as an example, bacteriostatic water, sterilized alcohol, 25 gauge syringe (or 27 gauge syringe)
2. Open the cap of the hCG and antibacterial water to reveal the rubber cork, through which the needle of the syringe is inserted into the bottle.
3. Use alcohol to disinfect the rubber stoppers of hCG powder bottles and antibacterial water bottles
4. Open the cap of the syringe needle and disinfect it with alcohol.
5. Insert the sterilized syringe needle from the rubber stopper into the bacteriolytic water bottle, and draw 2ml bacteriolytic water twice.
A helpful trick is to inject as much air into the bacteriab as you want to pump out, in this case preventing a vacuum in the bacteriab and helping to pump out the solvent faster.
6. Pour the extracted 2ml bacterial-inhibiting water into the hcg power bottle.
We now have 2ml of the formulated solution containing 5000IU hCG, so each 0.1ml solution contains 250iu hCG. If our dose is 500IU per day, 0.2ml of the finished solution should be taken each time.
If a smaller needle needs to be replaced, sterilize it.
7. Remove the poisoned syringe and extract 0.2ml of finished hCG solution. Use alcohol to disinfect the needle and the skin at the injection site. Then, the needle is inserted under the skin and the plunger is slowly pushed to complete the injection.
8. After the injection, put the hCG in the refrigerator for storage.

hCG is administered primarily by intramuscular injection (IM), but also subcutaneously (SC).
The average (3ml 22-25G x ½-1 ½") syringe was sufficient for IM injection, but an insulin syringe (½-1ml 28-30G x ½-1") was recommended for SC injection.
The study found little difference in results between intramuscular and subcutaneous injections. The only difference is the speed of release at the injection site and the time required to reach the plasma peak. Intramuscular injection is 6 hours, subcutaneous injection is 16-20 hours.

If used to treat hypogonadism, short-term treatment is currently recommended for 6 weeks and long-term treatment for 1 year, depending on individual needs.
Short-term medication is usually given at 500-1000 units three times a week for three weeks. Then the dose was the same twice a week for 3 weeks.
Long-term injection of 4000 units, 3 times a week, for 6-9 months. This was then reduced to 2,000 units three times a week for three months.

hCG is sealed in a vial or ampoule as a freeze-dried powder (freeze-dried). The commonly used hCG specifications are 2000IU, 5000IU and 10000IU.
hCG freeze-dried powder should be stored at room temperature between 15 and 30 degrees Celsius. It should be reformulated with appropriate bacteriostatic water (or sterile water) before administration. The prepared hCG solution needs to be refrigerated at a temperature of about 2-8 degrees Celsius.
The prepared hCG solution should be used within 30 days as far as possible.

When preparing hCG solutions, the concentration of hCG per ml of solution depends on the concentration of freeze-dried powder and the volume of thinner. For example, if 5000IUs hCG is diluted with 5ml of solvent, the resulting solution contains 1000IUs hCG per ml. Similarly, if 5000IU hCG is diluted with 10ml of solvent, the resulting solution contains 500IU/ml of hCG.
Bacteriostatic water should be used as a solvent when preparing a 30-day dose at a time.
Because sterile water diluted solution is more likely to breed bacteria than oil solution, always clean the top of the bottle with alcohol thoroughly when injecting hCG solution, and the needle used for injection must also be sterile.
Due to the fragility of protein hormones, if kept at room temperature after preparation, the molecules will denature and be destroyed, and hCG will become ineffective.
Violent shaking of the recombinant hCG will also destroy the protein molecules and should be avoided during preparation.

When someone asks, what is a SARM? We all know that SARM is a selective androgen receptor modulator.
So what are selective androgen receptor modulators?
Before we know what a selective androgen receptor modulator is, we need to understand the question "What is an androgen receptor?" "What is a regulator?" "What is selectivity?"

What are androgen receptors?
The main form of androgen is testosterone. Androgens play an important role in the body. In addition to reproduction, it can also maintain the balance of hormones in the body, stimulate protein anabolism, promote nitrogen deposition and increase the number and thickness of muscle fibers.
Androgens perform their functions by binding to androgen receptors.
The androgen receptor is a 120,000 Dalton molecular weight protein that is synthesized under the guidance of genes on the X chromosome. Androgen receptors are the intermediate substances in the action of androgens. Testosterone can only work by binding to androgen receptors. If there is no androgen receptor in the body, the androgen does not stimulate the tissue response. If androgen receptors are not sensitive, it will be difficult to build muscle.
Sensitivity to androgen receptors varies from person to person. Some people have large muscle size and low body fat, but their testosterone levels are actually not high in blood tests, probably because they have high androgen receptor levels. Some people train hard and eat well, but their muscles grow very slowly. A big reason for this is that the androgen receptors in the body are not sensitive.
Androgen receptor modulator (sarm) is designed to optimize this process and improve the efficiency of muscle synthesis.

What are receptor modulators?
In pharmacology, receptors are biomacromolecules composed of glycoproteins or lipoproteins that are present in the cell membrane, cytoplasm, or nucleus.
Receptor is a broad term in cell biology, referring to any biological macromolecule that can bind to hormones, neurotransmitters, drugs or signaling molecules within cells and cause changes in cell function.
Receptors are the components of cell membrane or cell that can recognize and bind to bioactive molecules, which can accurately amplify and transmit the signals recognized and received to the cell interior, thus causing biological effects.
When the receptor in the body is not sensitive, it will lead to the reduction of the binding rate with its ligand, can not achieve the corresponding effect. Receptor regulation can increase the sensitivity of the receptor and thus increase the probability of binding the receptor to its ligand.
Selective androgen receptor modulator (sarm) makes the androgen receptor more sensitive and can bind to more androgens, thus improving the efficiency of muscle synthesis.

What is selective?
Selective is the key word in selective androgen receptor modulators (sarm).
As bodybuilder increases the amount of androgens in the blood, it also adjusts the androgen receptors to bind to more androgens. At this time, if all the androgen receptors in the body are binding with androgens, the concentration of androgens is the highest in the prostate. A large number of androgens and androgen receptors are bound in the prostate, which will cause problems such as enlargement of the prostate. At the same time, androgen receptors in different parts of the body become sensitive and bind more to androgens, causing side effects such as acne and hair growth.
Selective androgen receptor modulators (SARMS) are selective and selectively bind to androgen receptors in bone and muscle to promote muscle growth and bone health without affecting the prostate and without a large number of androgen side effects.