What Are Candida Antibodies?
Candida antibodies are proteins produced by your immune system in response to infection by Candida species, most commonly Candida albicans. Candida is a yeast (a type of fungus) that normally lives in small amounts on the skin, in the mouth, gut, and vagina. In healthy individuals with a well-functioning immune system, Candida is kept in check by beneficial bacteria and immune defences.
When Candida overgrows, due to immune suppression, antibiotic use, or other factors, the body mounts an immune response that includes producing specific antibodies. A Candida antibody blood test measures three classes of immunoglobulin: IgA, IgG, and IgM. Each provides different clinical information about the timing and location of infection.
What Do the Three Antibody Types Mean?
| Antibody | What It Indicates | Timing |
|---|---|---|
| IgM | Acute or very recent infection | First antibody produced; rises within days, declines within weeks |
| IgG | Past or chronic infection; immune memory | Develops later, persists for months to years |
| IgA | Mucosal infection (gut, respiratory tract, urogenital) | Indicates active mucosal immune response |
Why Is This Test Ordered?
- Investigate suspected systemic (invasive) candidiasis in immunocompromised patients
- Evaluate chronic gastrointestinal symptoms that may be linked to Candida overgrowth
- Assess recurrent vaginal candidiasis to understand immune response patterns
- Investigate persistent oral thrush (oral candidiasis) unresponsive to treatment
- Part of a comprehensive assessment for patients with chronic fatigue, brain fog, or digestive issues
- Monitor immune response in patients receiving antifungal therapy
Normal Ranges
| Antibody | Negative | Equivocal | Positive |
|---|---|---|---|
| Candida IgA | Below 0.85 (index) | 0.85 – 1.15 | Above 1.15 |
| Candida IgG | Below 0.85 (index) | 0.85 – 1.15 | Above 1.15 |
| Candida IgM | Below 0.85 (index) | 0.85 – 1.15 | Above 1.15 |
Reference ranges vary by laboratory and assay method. Results should be interpreted alongside clinical symptoms and other diagnostic tests.
Check Your Candida Antibodies Levels at Home
The Core Health 45 includes Candida Antibodies testing along with 44 other biomarkers. Results in 2 working days with a free at-home phlebotomist visit.
View Core Health 45 →Interpreting Results
- IgM positive, IgG negative: Suggests acute or very recent Candida infection
- IgG positive, IgM negative: Suggests past infection or chronic/resolved candidiasis
- IgA positive: Suggests active mucosal Candida infection (gut, respiratory, or urogenital)
- All three positive: May indicate active systemic infection - further investigation needed
- All negative: No significant immune response to Candida - active infection unlikely
Important caveat: Positive Candida antibodies do not necessarily mean active disease. Many healthy individuals carry low-level Candida and have detectable IgG from past exposure. Clinical correlation is essential.
Causes of Positive Candida Antibodies
- Recurrent thrush: Vaginal, oral, or skin candidiasis triggers antibody production
- Antibiotic use: Antibiotics kill beneficial bacteria, allowing Candida to overgrow
- Immunosuppression: HIV/AIDS, chemotherapy, organ transplant medications, or high-dose corticosteroids
- Diabetes: Elevated blood sugar promotes Candida growth
- Invasive candidiasis: Candida in the bloodstream (candidaemia) — a serious condition requiring urgent treatment
- Gut dysbiosis: Imbalance in gut microbiome favouring Candida overgrowth
- Central venous catheters: Hospital-acquired invasive candidiasis risk factor
How to Manage Candida Overgrowth
- Reduce sugar and refined carbohydrate intake: Candida thrives on sugar
- Take probiotics: Lactobacillus and Saccharomyces boulardii help restore microbiome balance
- Use antifungals appropriately: Fluconazole, nystatin, or other antifungals as prescribed by your GP
- Address underlying causes: Manage diabetes, review immunosuppressive medications, use antibiotics judiciously
- Eat prebiotic-rich foods: Garlic, onions, asparagus, and leeks support beneficial gut bacteria
- Wear breathable clothing: Cotton underwear and avoiding tight clothing reduce moisture that promotes Candida
When Should You Get Tested?
- You have recurrent thrush (vaginal or oral) — more than 4 episodes per year
- You experience persistent digestive symptoms (bloating, gas, irregular bowels) not explained by other causes
- You have chronic fatigue alongside recurrent fungal infections
- You are immunocompromised and have symptoms of systemic infection
- You want to understand your immune response to Candida after a history of infections
Which Lola Health Tests Include Candida Antibodies?
Candida antibody testing (IgA, IgG, IgM) is available as an add-on with Lola Health blood tests:
Check Your Candida Antibody Levels
Get a comprehensive blood test from Lola Health with GP-certified results and personalised recommendations. All tests use venous blood draws for medical-grade accuracy.
Test This Biomarker at Home
Order the Candida Test — results in 2-3 working days with GP-reviewed insights.
At-Home Blood Testing
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