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A randomized placebo-controlled trial about the effect of UVB-irradiated white button mushrooms (Agaricus bisporus) and a vitamin D2 supplement on the 25(OH)D levels in healthy adults.

A randomized placebo-controlled trial about the effect of UVB-irradiated white button mushrooms (Agaricus bisporus) and a vitamin D2 supplement on the 25(OH)D levels in healthy adults.

Status
Active, not recruiting
Phases
Unknown
Study type
Interventional
Source
DRKS
Registry ID
DRKS00000195
Enrollment
24
Registered
2009-10-21
Start date
2010-01-27
Completion date
Unknown
Last updated
2025-04-07

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

healthy adults with vitamin D deficiency E56.9

Interventions

Group 1: verum group: the probands get a defined amount of Vitamin D (350µg) in form of a Vitamin D fortified (by UVB radiation) mushroom soup every week over a period of 4 weeks. Group 2: active cont

Sponsors

Medizinische Universitätsklinik Freiburg - Abteilung Innere Medizin I Hämatologie und Onkologie
Lead Sponsor

Eligibility

Sex/Gender
All
Age
18 Years to 45 Years

Inclusion criteria

Inclusion criteria: - healthy general condition based on medical history and examination at admission - body mass index (BMI) between 18,5 and 26 kg/m² - serum 25(OH)D < 25 ng/ml (< 50 nM) - serum calcium in normal range 2,15 ? 2,55 mM - written informed consent of the participants after educational advertising

Exclusion criteria

Exclusion criteria: - anamnesis of kidney stone - pregnancy - white button mushrooms intolerance or allergy - visit of a tanning salon right before or during the study - eating fish or liver during the study - taking supplements of Vitamin D during the study - abidance in the mountains or southern countries during the study - serum calcium > 5,2 mM during the study - cancellation of the informed consent

Design outcomes

Primary

MeasureTime frame
Significant rising of the serum 25(OH)D level from young healthy adults by the consumption of UV-B treated mushrooms compared to non-treated mushrooms. Serum 25(OH)D level will be measured 4 times on each weekly encounter and 1 time a week after the last soup administration.

Secondary

MeasureTime frame
Equality of UV-B treated mushrooms compared to a normal Vitamin D2 supplement in regard to improve the 25(OH)D status. The 25(OH)D status will be measured at the five weekly encounters.

Countries

Germany

Contacts

Public ContactPaul Urbain

Uniklinik Freiburg - Medizinische Klinik I Sektion Ernährungsmedizin & Diätetik

paul.urbain@uniklinik-freiburg.de0049 761 270 3336

Outcome results

None listed

Source: DRKS (via WHO ICTRP) · Data processed: Mar 29, 2026