Dietary magnesium or vitamin C supplementation as an adjunct to usual asthma therapy: a community-based investigation

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

ISRCTN

Registry ID

ISRCTN20984129

Enrollment

Registered

2004-01-23

Start date

1998-05-01

Completion date

Unknown

Last updated

2015-01-13

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

Conditions

Respiratory tract diseases: Asthma Respiratory Asthma

Interventions

1. Magnesium chelate 450 mg 2. Vitamin C 1 g 3. Placebo (lactose)

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: 1. Patients with asthma on inhaled corticosteroids 2. Aged 18-60

Exclusion criteria

Exclusion criteria: 1. Pregnancy 2. Oral steroids 3. Significant co-morbidity 4. Diuretics

Design outcomes

Primary

Measure	Time frame
1. Clinical control 2. Quality of life 3. Use of health care resources 4. Reductions in requirement for inhaled steroids	—

Secondary

Measure	Time frame
Not provided at time of registration	—

Countries

United Kingdom

Outcome results

None listed

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