Home Testosterone What is Free Testosterone: Normal Range, Unhealthy Levels and Best Booster.

What is Free Testosterone: Normal Range, Unhealthy Levels and Best Booster.

Posted by admin in Testosterone Category. Reviewed and Updated: 14 December, 2018

Testosterone belongs to the male hormones group that can freely circulate in the blood or combine with proteins. The duties of this substance, which is released by endocrine system, are sexual characteristics formations, sexual desire maintenance and other basic functions. Healthy man’s body contains a certain amount of free testosterone. Its rate changes (lowering or rapid elevation) cause metabolic disorders, impotence, vascular and nervous diseases.

What is Free Testosterone — Detailed Information

The testosterone concentration can vary according to age (young males have a higher index), and the day period, when a blood test is taken. The maximum rate is observed from 4 to 8 o’clock in the morning. The minimum one is found between 16 and 20 pm.

It seems that it‘s enough to take total testosterone amount test to find out whether it is decreased or elevated. However, it’s not so easy. How is free testosterone distinguished from total one?

What is Free Testosterone?

Testosterone, which the testicles and adrenal glands produce, enters the bloodstream. As soon as the total T (100%) reaches the blood, blood proteins embrace its bulk (98%), except for 2 percent, which remain free. Testosterone binds to two protein kinds: SHBG (60%) and albumin (38%). The link with albumin is unstable. That is why this part of testosterone is referred to as a free form. This is the principal feature of how the two types differ from each other.

The hormone bounded with globulin is inactive, unlike free testosterone, which is the active total testosterones’s (T total) fraction. It affects the organism significantly, namely it determines sexual behavior and takes part in male sexual characteristics development. If test results prove adequate T levels, it doesn’t completely evidence you have no difficulties with hormone production. Good physiological hormone’s rate doesn’t suggest that the active form, which influences the body most, functions properly.

The main difference between tests is that the T common can hide the active form insufficiency. Therefore, a separate free T-test is needed.

The sex hormone-binding globulin level has a great impact on the free TS to estradiol ratio. Normally, this correlation is equilibrium. If a man has a higher globulin level, it binds more free testosterone leading to estrogen elevation and subsequent unwanted effects.

Normal Levels of Free Testosterone

Free testosterone levels depend on the man’s age and day period. The uttermost rate is typical for 15- to 30-year-old persons. Experts note the activity peak before noon and reduction at night; these factors should be taken into consideration when performing a blood test. The hormone content measurement unit is nmol/l, and its adequate value is contingent on the age.

Age-related male free testosterone chart:

AgeMedian T level in men (ng/dL)
<25697
25-29637
30-34597
35-39567
40-44597
45-49527
50-59518-547

Free testosterone range is usually lower in women.

Differences between normal hormone level limits in strong sex are associated with many factors. Firstly, these are diurnal fluctuations, but sexual activity, nutrition, exercise or sedentary lifestyle, which is a key reason of poor physical activity, previous illnesses and several other factors, such as using non-legal steroids also have an impact. All mentioned above can both increase and decrease the hormone rates. Low level may be caused by anabolics, opiates (such as Vicodin, Morphine, Oxycodone, Percocet, Fentanyl, and OxyContin), spironolactone (Aldactone), myocardial infarctions, injuries, chronic illnesses, etc. (Molly M. Shores, Current Sexual Health Reports, 2014).

Features of the Tests for Determining Free Testosterone Range

For obtaining reliable test results, showing total and free testosterone level, certain stipulations must be observed. Special preparation, which is compulsory for getting precise results, precedes testosterone analysis. The patient is recommended to avoid physical and emotional stress and other pressure from the outside for two days. Before the analysis (not less than 3 hours) it is forbidden to have a meal, swallow tablets, drink beverages and smoke cigarettes or hookah. It is advisable to be tested in the morning to observe an adequate T hormone concentration. Also, experts suggest some people to be tested twice for assessing the real level without a substantial rate difference.

The test is carried out according to certain indications. If a man has pathological processes (or signs of them) of target organs, his free testosterone level should be revealed in a mandatory manner. These signs are bad potency, acne, barrenness, osteoporosis. Free testosterone checking is prescribed to boys with delayed or early puberty. Nowadays, most doctors are not likely to assign this procedure only for the sake of determining the general T level.

The intake of medical pills and physical exertion may influence study results. Venous blood is required for this manipulation. Its volume depends on the laboratory type the testing methods. Many scientists debate about the possibility of saliva usage for obtaining necessary results. Protein concentration doesn’t impact free T quantity in saliva. Test results with this component are the same as those with plasma. However, not all laboratories can perform such studies.

Best Free Testosterone Booster — Tribulus Terrestris

Tribulus terrestris is the most popular component of testosterone boosters. There is a profusion of unusual names of this herb, in particular goat’s-head, bullhead, bhakhdi, caltrop, cat’s-head, devil’s-thorn, puncture vine, and tackweed. It has the largest evidence base and is available in almost every T booster. It is often referred to the group of natural steroids. The most popular and the best free testosterone booster supplement that contains Tribulus is Brutal Anadrol.

Due to the lack of scientifically proved efficiency of this herb, we cannot recommend puncture vine for musculature enlargement. Nevertheless, it can be useful as a constituent of complex supplements and can be taken by men with testosterone lack, athletes with an overtraining syndrome risk, and those, who adhere to the prolonged low-calorie diet. The most effective testosterone boosters are anabolic steroids, including Nandrolone. However, they can disrupt the normal hormonal background and cause harm to health. The same goes for synthetic human growth hormone.

Unfortunately, sometimes, steroids and sport are inseparable concepts. It is especially true for professional bodybuilding. However, athletes use not only steroids. They take anti-estrogens (such as Clomid), synthetic fat burners such as Clenbuterol, and others.

Free Testosterone Calculator — Calculate Your Hormone Levels Online

On some websites, you can calculate your free testosterone using data from other tests.

Testosterone calculator will provide you with accurate bioactive testosterone assessment in the blood plasma. These parameters can more precisely reflect free T hormone amount than the sole measurement of total serum T hormone does.

To determine free testosterone with this web tool, you need to know:

  • albumin;
  • SHBG;
  • and total testosterone levels.