For many people, 300ng/dL is a very low testosterone level. If the testosterone level is this value, there may be certain symptoms of low testosterone. However, normal testosterone levels range from 264 to 916ng/dL, indicating that 300ng/dL is a normal value. Why is there such a wide range of testosterone levels?
This is because men’s testosterone <> levels are constantly changing throughout their lives, and this change generally follows the same rule, that is, “with the growth of age, and year by year.” The age of 20 is about the highest level of testosterone in a man’s life, and after that, testosterone levels will decline every year.
Does anyone’s testosterone level rise from year to year?
It is true that there are people whose testosterone level rise with age without the use of exogenous testosterone and other drugs that promote testosterone production. Here is a case study of a 40-year-old man with a blood test result of total T=1082 and Free T=10. According to him, he did not use exogenous testosterone, nor did he use other drugs that would promote testosterone production.
The hypothalamic-pituitary-testicular axis (HPTA) controls the secretion of testosterone. When the body’s testosterone levels are low, HPTA activates positive feedback to start promoting testosterone secretion. When the body’s testosterone level reaches the maximum threshold, HPTA initiates a negative feedback that begins to inhibit the secretion of testosterone, so that the testosterone level is in dynamic equilibrium.
The normal testosterone level is between 264 and 916ng/dL, the maximum 916 is about the testosterone level of a man when he is 20 years old, and the minimum 264 is the testosterone level of an elderly man. What happens if a man reaches the age of 40 and finds that his testosterone level exceeds 1,000 ng/dL? Of course, at first you might be happy, like you’re 20 again. Then, you might worry, is there something wrong?
What’s the problem?
When the testosterone level exceeds the maximum of this age, the first thing to consider is whether there is a problem with HPTA, at this time, the pituitary gland is usually checked, whether the pituitary tumor affects the function of HPTA.
If the test is completed and no physical problems are found, it is also possible to have a testosterone level of 1000ng/dL at the age of 40, and it is said that some young men in the Colombian army test for testosterone levels as high as 1500 ng/dL, which may be related to genetics.
Are there other factors that cause testosterone levels to rise? It is said that this man measured his testosterone level above 1000 after he lost weight. Do you know how much weight he lost? Two hundred pounds. And he’s still on a diet.
Some experiments have shown that fasting increases testosterone levels. At the same time, he has lost a ...

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Normal testosterone levels are between 264 and 916ng/dL, while some men with high testosterone level around 1000ng/dL still have low testosterone symptoms, including severe fatigue, slow recovery from exercise, libido problems, mild ED, depression, anxiety, and even reduced erections in the morning. Today we talk about possible causes.
Production and form of testosterone
The hypothalamic-pituitary-testicular axis (HPTA) controls the release of testosterone. After testis release the testosterone , this part of testosterone does not enter the blood circulation directly, but part of it bind to SHBG (sex hormone binding globulin), part of it bind to albumin, and only a small part (about 2%) unbind and can bind freely to androgen receptors. To make a difference. Therefore, this part of the unbound state of testosterone is Free T. The higher the level of Free T, the more benefits of high testosterone levels.
In addition to Free T, a portion of testosterone binds to albumin. Albumin is a carrier protein that has a low binding force with testosterone and can easily separate from the bind testosterone. This testosterone, which binds to albumin, arrive various parts of the body in the blood circulation. And then when testosterone separate from albumin, it also acts as testosterone.
The part of testosterone that binds to SHBG is difficult to separate from SHBG because it has a high affinity with SHBG. Therefore, this part of testosterone is equivalent to being wasted, unable to produce corresponding effects.
Conclusion
So, Free T is the most potent testosterone, followed by albumin bound testosterone, and finally SHBG bound testosterone. When we take a blood test, the total testosterone measured includes the part of the testosterone that is bound to SHBG, so when the total testosterone level is high, it does not mean that the body has a high level of available testosterone.
When you have a high testosterone level and, at the same time, a high SHBG level, then you are still likely to have low testosterone symptoms.
Boron helps reduce SHBG levels. There is also Proviron , a weak anabolic steroid that preferentially binds to SHBG, increasing the level of free testosterone and improving the utilization of testosterone and other AAS.