Nobody can say what the optimal 25(OH)D value is. Therefore, the suggestions vary by author. After viewing many different suggestions, we came to the following conclusion:
The ability of each person to produce vitamin D through sun exposure or to increase the vitamin D level by taking vitamin d supplements, can vary significantly and depends on age, body weight, skin colour, sun exposure, and life style.
It is not said, that each person can reach the same vitamin D level by taking the same amount of vitamin D or having the same sun exposure. Some people may need more or less vitamin D per day to achieve the same level.
Therefore, the recommended rules for calculating the optimal vitamin D dosage are only indicative. To know your personal vitamin D level, a 25(OH)D blood test has to be performed. It shows you exactly how your vitamin D level is changing depending on the vitamin D intake and sun exposure.
In Europe the 25(OH)D value is usually measured in ng/ml. But any laboratories also use nmol/l.
- To calculate a test result from nmol/l to ng/ml, divide the nmol/l value by 2,5. For example, 50 nmol/l are equal to 20 ng/ml (50 ÷ 2,5).
- To calculate a test result from ng/ml to nmol/l, multiply the ng/ml value with 2,5. For example, 20 ng/ml are equal to 50 nmol/l (20 x 2,5).
Ich lebe in Spanien und muss Ihre Europaseite zum Bestellen benutzen. Dadurch werde ich gezwungen den Dialog in Englisch zu führen und Produktinformationen in English zu lesen, was ich zwar kann aber nicht will. Es wäre super, wenn man die Prozesssprache auswählen könnte.