Variable food-specific IgG antibody levels in healthy and symptomatic Chinese adults.

Although food-specific IgG concentrations for the other 12 foods showed an increasing trend with age, the concentrations of egg-specific IgG and cow’s milk-specific IgG were significantly higher in the 18–34 years age group than in the 35–44, 45–54 and 55–64 years age groups ( Figure S4 ).

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