Understanding Candida IgG: Normal vs Optimal Ranges

?What is Candida IgG?

Candida IgG measures systemic IgG antibodies against Candida albicans antigens, reflecting prior or ongoing systemic immune exposure to this yeast. Unlike IgA (mucosal), IgG antibodies indicate systemic immune activation and can persist for months to years after an infection. Very high IgG levels may suggest invasive or disseminated Candida beyond the gut lumen.

!Why It Matters

Elevated Candida IgG alongside symptoms of gut dysbiosis and brain fog suggests a systemic immune response to intestinal overgrowth. When combined with Candida IgA and IgM, the pattern of antibody elevation helps characterise the chronicity and extent of the infection. Monitoring IgG over time assesses treatment response.

Reference Ranges

Lab normal ranges may vary between laboratories. Optimal and longevity targets are based on research literature and should be interpreted with your physician.

Symptoms of Imbalance

• Persistent fatigue and post-meal cognitive impairment
• Recurrent gut symptoms unresponsive to dietary changes
• Systemic inflammatory symptoms: joint pain, headaches
• Recurrent oral, skin, or vaginal fungal infections

How to Improve Your Levels

• 1Follow an anti-Candida diet: eliminate sugar, refined grains, and alcohol for 4–8 weeks
• 2Use systemic antifungal herbs: berberine, undecylenic acid, or prescription antifungals if severe
• 3Support gut barrier repair with L-glutamine, zinc carnosine, and collagen peptides
• 4Restore microbiome balance with multi-strain probiotics
• 5Manage blood glucose tightly — hyperglycaemia directly feeds Candida

When to Test

Chronic fatigue with gut symptoms; suspected invasive candidiasis; complement to Candida IgA testing; monitoring antifungal treatment response.

Related Biomarkers