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.
Another uncommon problem relates to the pituitary gland. It can malfunction and produce too much or too little TSH. This has a direct impact on thyroid function and the amount of T4 and T3 produced. Thyroid related illnesses have a variety of causes, and sometimes the problem is not with the thyroid gland itself. Whatever the cause, abnormal physical and mental symptoms will appear, which can range from mild to severe.