Male sex hormone


Testosterone is an important male and female sex hormone produced in the testes in males and in the ovaries and adrenal glands in females, as well as from the conversion of androstenedione in peripheral tissues, and is essential for a variety of physiological processes, including sexual development and function.

What is testosterone?

Testosterone is an important male sex hormone produced in the testes in men and in the ovaries* and adrenal glands in women. Testosterone can also be formed from the conversion of androstenedione in peripheral tissues. Testosterone is transported to a large extent in the blood, bound to SHBG, while a small amount (about 1-2%) is free and therefore biologically active.

Testosterone can be converted to 5alpha-Dihydrotestosterone in the tissues, which is highly biologically active. The effect of testosterone on the body is dependent on the blood levels, the number of androgen receptors and the concentration of the enzyme 5 alpha-reductase in the respective tissue. In adipose tissue, testosterone can be converted to estrogen.

The amount of testosterone is significantly higher in men than women. The hormone has a great importance for the body's muscle structure, skeleton and sex drive. It also helps us to have a good mood and to keep going during, for example, physical activity.

During puberty, the amount of testosterone increases and around the age of 25 it is usually at its highest. After that, testosterone continues to form throughout life in a smaller amount. From the age of about 40, it is common for the amount of testosterone to decrease a little each year.

Why is testosterone analyzed?

Testosterone is analyzed to assess men's production of the important sex hormone. Low levels of testosterone can cause problems such as decreased libido, loss of muscle mass, increased body fat, decreased bone mass, depression and even infertility.

Women's testosterone levels are analyzed to investigate possible hormonal imbalances, which can cause problems with the menstrual cycle, estrogen production, changes in muscle mass and fat distribution, and libido.

Testosterone levels and testosterone secretion

For men, normal testosterone levels are usually higher than 12 nmol/L, while values lower than 8 nmol/L are interpreted as a deficiency. Values between 8-12 nmol/L are considered a gray area.

Testosterone secretion has a strong diurnal variation with a maximum in the morning and a minimum value at midnight.

To get the most accurate assessment possible of testosterone levels in men, a fasting test is recommended, because testosterone levels drop by about 30% one to three hours after a meal in the morning. For women, the cycle day is crucial for assessing testosterone levels, and sampling time and/or fasting are not considered to have any clinical significance.

Symptoms of testosterone deficiency

Testosterone's ability is to help the body be strong and feel that it is at its best. If, for example, you experience problems such as reduced, or no, sex drive, this may be because you have too low a level of testosterone. Here are common symptoms of testosterone deficiency:

  • dejection
  • impulsivity
  • fatigue
  • fewer morning erections (men)
  • reduced sex drive
  • no sex drive
  • impotence
  • reduced muscle mass
  • anger
  • easily irritated
  • sleeping problems
  • increased amount of fat.
*The ovaries are the gonads in women that produce egg cells and hormones such as estrogen and progesterone. They are located on both sides of the uterus and are an important part of the reproductive system. Overall, the ovaries have a central role in the regulation of the menstrual cycle and in reproduction. They also play an important role in maintaining a woman's sex hormone status and overall health.

Tests containing the marker Testosterone

Hormone tests

Hormone tests

Free testosterone
Testosterone test incl. SHBG

Free testosterone

  • Calculates your level of free testosterone in the blood.
  • Also analyzes SHBG and total testosterone.
  • Provides increased insight into your testosterone levels.

395 kr

Testosterone test


  • Measuring your level of testosterone.
  • Analysis to identify testosterone deficiency.
  • Get increased insight into your testosterone level.

195 kr179 kr

Health checks

Health checks

Hormonal balance plus
  • Comprehensive health check for hormonal balance.
  • Extended hormone analysis for you as a woman.
  • Get deeper insight into your hormonal levels.

1 595 kr

Health check - Man


  • Health check designed for you as a man
  • Includes a total of 45 health markers
  • Gives you knowledge about your general state of health
  • Can identify early signs of health problems

1 795 kr

Health check man plus
Comprehensive health check

Health check man plus

  • Comprehensive health check for men.
  • Includes 65 different health tests.
  • Provides insight into your health data.
  • 10 different health areas.

4 595 kr3 895 kr

Sport performance health check


  • Health check for those who exercise actively.
  • Analysis of markers that affect your performance.
  • Gives you the conditions to optimize your health.

1 995 kr

Testosterone Plus
Health check Testosterone plus

Testosterone Plus

  • Health check that gives an insight into your testosterone production
  • Analysis of markers that affect reduced muscle mass, feelings of pleasure and fatigue.
  • Gives you better conditions to optimize your health.

1 095 kr

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