"Circulating toxins" refers to harmful substances that are moving or spreading throughout the body. These toxins can be produced by bacteria, chemicals, or waste products, and can cause various health problems. Full definition
I'd suspect some kind of circulating toxins that stimulate immunity, either a food sensitivity or infection, and it looks like the fungal infection would be the most likely cause. (perfecthealthdiet.com)
Constipation increases circulating toxins in the body, which can inflame the brain and leads to bad moods. (functionalhealthnews.com)
(headaches, insomnia, irritability, nausea, malaise, weakness, dizziness are symptoms of excess circulating toxins) (livingthenourishedlife.com)