Human Intervention Study to Increase 25-hydroxyvitamin D Levels

"Wheat germ oil is naturally rich in vitamin D precursors (ergosterol and 7-dehydrocholesterol), which are converted into vitamin D2 and vitamin D3 by a defined UV light irradiation for the present study (wheat germ oil (UV treated).~The wheat germ oil (UV treated) is dispensed in dark glass bottles without label. The distinction between the groups is based on the expiration date (08.05.2018 vs. 09.05.2018). The distinction between the groups is not possible for the participants.~The daily dosage of wheat germ oil is 10 ml and the study products will be consumed over an entire period of 6 weeks (no follow-up).~Recommendation for intake: pure before a main meal."

"commercial available wheat germ oil The wheat germ oil (untreated) is dispensed in dark glass bottles without label. The distinction between the groups is based on the expiration date (08.05.2018 vs. 09.05.2018). The distinction between the groups is not possible for the participants.~The daily dosage of wheat germ oil is 10 ml and the study products will be consumed over an entire period of 6 weeks (no follow-up).~Recommendation for intake: pure before a main meal."