For this product, Medex chose a lower, more moderate dose that is closer to the general daily recommendation (RDA) for a healthy population, which according to NIH ODS (2024) is 600-800 IU/day. Doses of around 4000 IU, found in some other products, are closer to the upper safe limit and are more often used in practice for faster correction of a diagnosed deficiency. If you have a laboratory-confirmed low vitamin D level (25(OH)D), consult your doctor about whether 1000 IU is sufficient for you or whether you need a higher dose.

Vitamin D is an important micronutrient during pregnancy and breastfeeding, and this product's low dose (1000 IU/day) is relatively moderate compared to high-dose products intended for this group. Nevertheless, we recommend that pregnant and breastfeeding women be sure to check the suitability and dosage with their gynecologist or personal doctor before starting any dietary supplement, including this one, since individual needs and possible contraindications vary from person to person and cannot be replaced by online content.

The product does list children and adolescents among its target groups, but we recommend that you be sure to check the appropriate dose with a pediatrician before use in children, as recommended vitamin D intakes for children differ from those for adults and vary by age. Dosing with a spray does allow for easier adjustment to smaller doses than with fixed-dose capsules, which can be an advantage for children, but the final decision on the appropriate dose should be left to a doctor.

For general maintenance of an already adequate vitamin D level, 1000 IU/day is a reasonable, moderate dose that is above the basic RDA recommendation (600-800 IU, NIH ODS, 2024). However, if you have a laboratory-confirmed deficiency (low 25(OH)D), research shows that higher doses, up to 4000-5000 IU/day over several weeks, are more often needed for effective correction, especially in individuals who are initially deficient (Han et al., 2019). We recommend checking your status with a lab test and consulting a doctor about the appropriate dose for your specific condition.