Examining Vitamin D Levels in British African-Caribbean Women

Is this trial a fit for you?

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This observational study investigates the vitamin D status of British African-Caribbean women living in the UK, particularly during late autumn and winter months when sun exposure is limited. The research aims to identify factors influencing vitamin D levels, such as dietary intake and sun exposure, and will compare findings from two different seasons. By focusing on this specific population, the study seeks to address a significant gap in existing research regarding vitamin D deficiency and its health implications.

Why it matters

Who can join: the full rules

Inclusion Criteria:

* Women
* British African-Caribbean Self-reported Having African ancestral origin and migrated via the Caribbean islands, or having at least one parent with African ancestral origin that migrated via the Caribbean
* Living in England for \>2 months
* Aged 18-35 or \>55 years
* No significant health issues
* Pre-menopausal (regular menstrual periods) or Post-menopausal (menstrual periods stopped for longer than 12 consecutive months)
* BMI 18-30kg/m2

Exclusion Criteria:

* Women in perimenopause or menopause
* Pregnant or planning pregnancy during study period
* Hypercalcaemia (\>2.5mmol/L) - assessed and excluded at baseline
* Currently receiving treatment for medical conditions that are likely to affect vitamin D metabolism (osteoporosis, hormone replacement therapy, anti-estrogens treatment, antiepileptic drugs and breast cancer treatment)
* Regular use of sun beds
* Having a sun holiday one month prior to commencing study or plans for a sun holiday for more than 4 weeks within the study period
* Women who take vitamin D or calcium supplements (or multivitamin supplements that contain these vitamins) - If potential participant agrees to stop supplement use to join the study, a wash-out period of 8 weeks prior to commencing the study is acceptable
* Living in England for less than 2 months

Where it's running

• University of Surrey
  Guildford, United Kingdom Recruiting

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

• Vitamin D Supplementation in Children with Irritable Bowel Syndrome

  This study tests whether giving vitamin D to children with IBS and low vitamin D levels can improve their IBS symptoms compared with a placebo.

  Recruiting Aziz Bhatti Shaheed Teaching Hospital · Gujrat, Punjab Province · NCT07914478

• Vitamin D and dental implant osseointegration in adults with deficiency

  This study tests whether giving vitamin D helps improve how well dental implants fuse with bone in adults who are deficient.

  Recruiting Future University in Egypt · Cairo, New Cairo · NCT07684404

• Vitamin D2 with Calcitriol in kids with cholestasis and vitamin D deficiency

  This study tests whether adding calcitriol to vitamin D2 helps children with cholestasis and vitamin D deficiency reach healthier vitamin D levels.

  Recruiting Phase 4 Chulalongkorn University · Bangkok · NCT07670611

• Vitamin D and the body's anti-inflammatory response in gum disease

  This study tests whether vitamin D can modulate the body's anti-inflammatory response in people with gum disease.

  Recruiting Recep Tayyip Erdogan University Training and Research Hospital · Rize · NCT07636733

• Bone Myoregulation and Posture in Vitamin D Deficiency

  This observational study tests whether adults with vitamin D deficiency differ in postural stability and muscle activity from healthy controls during a single-session, noninvasive assessment.

  Recruiting Istanbul Physical Medicine Rehabilitation Training and Research Hospital · Istanbul · NCT07435935

• Adding exercise to vitamin D treatment for diabetic men with erectile dysfunction and low vitamin D.

  This trial will see if adding regular moderate treadmill walking to high‑dose vitamin D replacement helps men with type 2 diabetes, chronic erectile dysfunction, and low vitamin D levels.

  Recruiting Cairo University · Dokki, Giza Governorate · NCT07366970

How to take part

1. Review the eligibility criteria above with your treating physician.
2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.