Comparison of the bioavailability of vitamin D2 and D3

Comparison of the bioavailability of vitamin D2 and vitamin D3 in healthy volunteers when consumed at different levels in a malt drink

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

ISRCTN

Registry ID

ISRCTN24666304

Enrollment

Registered

2011-08-02

Start date

2011-02-22

Completion date

Unknown

Last updated

2016-10-17

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

Conditions

Vitamin D supplementation Nutritional, Metabolic, Endocrine Vitamin D deficiency

Interventions

1. Participants were randomly allocated to placebo or one of 4 experimental treatments of vitamin D: 1.1. 5ug cholecalciferol or 1.2. 5ug ergocalciferol or 1.3. 10ug cholecalciferol or 1.4. 10ug erg

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: 1. Healthy males or females 2. Ages of 18 - 65 years

Exclusion criteria

Exclusion criteria: 1. Seated blood pressure >160/105 mm Hg 2. Body Mass Index 35 kg/m2 3. Taking vitamin and mineral supplements (including cod-liver oil), or prescription calcium/vitamin D 4. Recent exposure to high UVB light (since 1 December 2010) 5. Intolerance to study product (lactose, milk protein) 6. Chronic renal, liver or inflammatory bowel disease 7. Diabetes 8. Unwilling to follow the protocol and/or give informed consent 9. Unwilling to restrict consumption of oily fish to no more than 2 portions of oily fish per week

Design outcomes

Primary

Measure	Time frame
Change in serum 25(OH)D concentrations	—

Secondary

Measure	Time frame
Change in calcium and parathyroid hormone concentrations	—

Countries

United Kingdom

Outcome results

None listed

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