Skip to main content

Hessels+Grob offers information, online instructions and in-depth articles to ensure reliable use of our products and services.


Dr. Jan Hessels

In addition to the current 20-IgE tests (4 different packages), it has recently become possible to request separate specific IgE allergy tests.


The anti-Müller hormone (AMH) and follicle stimulating hormone (FSH) are two hormones that are closely involved in the growth and development of egg cells. The stock of eggs is...


Vitamin B12 deficiency can lead to macrocytic anaemia. In many cases, however, other symptoms and complaints occur before anaemia occurs. We see active vitamin B12 as the most...


Iodine is a very important micronutrient that is naturally rare in our diet. Iodine deficiency is once again a topical issue due to the lower average consumption of kitchen salt...


Food intolerance is a loaded subject. In mainstream medicine it is not recognized and not a lot of research is done on it. Nevertheless, there are many indications in the...