Please check the following articles to find what low SigA means. There are the simple treatment to boost SigA.
How low SigA promotes loss of oral tolerance – Dr. Datis Kharrazian
Genova Diagnostics Secretory IgA interpretation pdf
Low SigA and why it matters to your gut health? – Jill Carnahan M.D.
Low secretory IgA levels causing immune and digestive issues – Steve Grant
