Tests for hormones and vitamins

To begin with, if you complain of a constant or increasing depressive state, the doctor will refer you to the study of the level of the hormones melatonin and serotonin. The level of melatonin changes during the day, because this hormone is mainly produced at night, and therefore it is recommended to take the analysis early in the morning. Normally, the level of melatonin in the morning reaches 15-30 pg / ml (and at night – 52.3-149.4 pg /ml). The serotonin norm is 50-220 ng/ml. An increase in melatonin and a decrease in serotonin may indicate a depressive state.

Another useful analysis is for the level of vitamin D (25-OH Vitamin D).

In adults, its concentration in the blood should normally exceed 30 ng/ml (or 50 nmol/l). According to the recommendations of the Ministry of Health of Russia from 2015, the daily norm of vitamin D (cholecalciferol D₃ and ergocalciferol D₂) is set for the age group of 18-50 years at 600-800 IU, for people over 50 – 800-1000 IU, for pregnant and lactating women — 800-1200 IU. If there is too little of it, then this also indicates the cause of chronic fatigue.

The third analysis, or more precisely, a set of tests, the doctor may prescribe if he suspects that constant fatigue is caused by a lack of vitamins. The study can be carried out both on the content of each vitamin separately, and immediately in a complex. Complex tests for the level of vitamins in the body are now offered by many laboratories.