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.
This type of hypothyroidism can be caused by any type of stress. Eventually the thyroid becomes nutritionally depleted and cannot function properly. If the autonomic nervous system is out of balance, the thyroid is not properly stimulated by the pituitary to produce adequate amounts of thyroid hormone.