A comparison of the absorption of Vitamin D with and without pollen

A comparison of the absorption of ergocalciferol with and without pollen: a randomised controlled trial

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

ISRCTN

Registry ID

ISRCTN99745836

Enrollment

Registered

2012-07-16

Start date

2012-05-01

Completion date

Unknown

Last updated

2020-01-06

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

Conditions

Vitamin D absorption in healthy volunteers Nutritional, Metabolic, Endocrine

Interventions

Participants are randomised to either vitamin D with spore encapsulation or vitamin D without spore encapsulation. The vitamin D supplement will be taken on an empty stomach after par

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: 1. Male or Female subjects between the age of 35-65 2. No concomitant medication or vitamin supplements 3. No concomitant disease processes 4. Body Mass Index 21- 29kg/m2 5. Systolic blood pressure =140 mm Hg and diastolic pressure =85 mm Hg

Exclusion criteria

Exclusion criteria: 1. Concomitant medication or disease processes 2. Body Mass Index 29kg/m2 3. Systolic blood pressure >140 mm Hg and or a diastolic pressure >85 mm Hg 4. Subjects taking vitamin D supplements 5. Subjects not willing or able to fast until 12 noon (a total of 14 hours) 6. Subjects taking any food supplements including pollen

Design outcomes

Primary

Measure	Time frame
Area under the curve for 25-hydroxy (25OH) vitamin D levels at (time 0), then at 15, 30, 45, 60, 120, 180 and 240 minutes after taking the supplement.	—

Secondary

Measure	Time frame
1. Adjusted Calcium 2. Parathyroid hormone At (time 0), then at 15, 30, 45, 60, 120, 180 and 240 minutes after taking the supplement.	—

Countries

United Kingdom

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Feb 4, 2026