Professional Performance Check

Professional Performance Check

Is your day full of stress, lack of drive, tiredness and bad concentration? More than 60% of people are stressed. Their work performance is reduced, work quality and their psyche suffers.

The comprehensive bundle is aimed at people who want to quickly and easily reach maximum professional performance. Based on an uncomplicated blood sample test, it analyses your vitamin D and vitamin B12 blood levels.

The nerve vitamin B12 is of particular importance especially in case of a stressful working life and enhances concentration and memory.

Vitamin D deficiency leads to symptoms such as fatigue, lack of drive as well as circulatory problems and a weakened immune system. Hence, professionals who mainly work in an office, should have their vitamin B12 and vitamin D levels checked in order to prevent or remedy existing deficiencies.

  • extensive check to help you maximise your job performance
  • simple to use test kits to check your vitamin D and vitamin B12 level
  • vitamin B12 is essential for the ability to focus and your memory
  • vitamin D is essential for many body function - lack of vitamin D can cause listlessness, powerlessness and weaken  immune systems
  • designed for professionals who tend to work inside and limited contact to direct sunlight

Sale price Regular price
£59.00 including VAT


cerascreen® Professional Performance Check

Professional Performance Check contains the following tests:

Vitamin D 

Vitamin D, which is actually a hormone, becomes increasingly present in the media - and rightly so. According to various studies, most people working in an office suffer from vitamin D deficiency. And that despite its high importance for the vital functions of the human body. In more than 30 essential bodily functions alone it plays a key role. As vitamin D is for 90% produced by full body sunbathing, it is highly likely that these people suffer from a deficiency. Moreover, certain diets or other nutritional deficiencies may aggravate the vitamin deficiency. In many cases, the vitamin D level in people affected lies below 31 nanograms per milliliter (ng/ml) and thus below the minimum level advised by orthomolecular physicians. They recommend a vitamin D level of 40-60 ng/ml as a target value.
You should best check your vitamin D level several times per year.

Vitamin B12

You should not only pay attention to a sufficient vitamin D level. Also a vitamin B12 deficiency can considerably reduce performance power and perseverance. Vitamin B12 is a so-called essential vitamin. This means that the vitamin must be taken up by consuming certain foods for sufficient supply as the human gut bacteria can only produce it in negligible quantities. In brief, this means that a deficiency is preprogrammed without a regular and sufficient intake through the diet. Vitamin B12 as a coenzyme is contributing to many vital metabolic processes like e.g. nerve protection and nerve regeneration, cell division and cell respiration, synthesis of messenger substances and detoxification. In particularly stressful periods, the vitamin B12 demand may even rise. For the release of the stress hormones noradrenaline and serotonin, lots of vitamin B12 are needed. On top, stress reduces the perfusion of the digestive organs and thus the metabolization of cobalamin (vitamin B12). Stress, in this context, means all types beginning from major mental effort and physical strain (physically demanding work and competitive sports) up to anxiety, lovesickness and grief or recurrent infections. In accordance with the functions of vitamin B12 and the additional demand in the fast-paced work life, symptoms of a deficiency can be deduced: reduced stress resistance, concentration problems and signs of fatigue.

After your order, we send you the cerascreen®  Professional Performance Check test kit directly to your home. Using our test kit, you can take a few drops of blood from your finger tip without any pain. Then you send your sample free of charge to our laboratory in the enclosed return bag. Our diagnostic laboratory analyses your blood sample and, after just a few days, you will receive a detailed results report. You can find this report as well as personalized recommendations for your optimal vitamin D and vitamin B12 levels in your personal online area.

Determine your results conveniently at home 

How our tests work

Certified laboratory and quality management

cerascreen laboratory


At Cerascreen, we have carefully selected trusted laboratory partners, such as DST Diagnostic Systems & Technologies, who have specialised in holistic human diagnostics for over 10 years and are located in Schwerin, Germany. The cerascreen® concept is based on the long-standing experience of DST Diagnostic System & Technologies in human diagnostics along with the expertise and advice offered by experienced health specialists across various disciplines throughout Europe.


  • DIN EN ISO 13485
  • Interlaboratory test

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£59.00 including VAT