Fungi possess cell walls made of the glucosamine polymer chitin, and algae typically possess walls made of glycoproteins and polysaccharides. Unusually, diatoms have a cell wall composed of biogenic silica.
While stress does not appear to cause thyroid problems, a person with an overactive thyroid would typically be anxious and could definitely feel more stressed than usual. Also, if you take thyroid hormone pills for an underactive thyroid gland, your dose may be too high.
Severe hyperthyroidism, called thyrotoxic crisis (thyroid storm), may be life-threatening because of its effects on the heart and brain. It often occurs in people who are untreated or are receiving inadequate treatment for thyroid problems. A severe infection can also cause a thyrotoxic crisis.