Is a blood test necessary?

The only thing we strongly recommend is to have the ferritin content checked for a few weeks IN FRONT OF you start sleeping in eem altitude tent. If this is too low, you can take some iron-rich food and extra iron supplements in advance, which increases the ferritin. Ferritin is the fuel for the production of red blood cells. If this is too low then the body is unable to produce extra red blood cells. As a result, the effect of the height tent may be less.

The ferritin content must be at least 40ug / l IN FRONT OF you start by sleeping in a height tent.