Malabsorption of thyroxine, calcium, and vitamin D in a thyroparathyroidectomized woman: efficacy of therapy with medium-chain triglyceride oil.

A 28-year-old woman with surgically induced hypothyroidism and hypoparathyroidism required large doses of replacement medications due to malabsorption from short bowel syndrome. Malabsorption of thyroxine was documented using the technique of double isotope radioiodothyronine turnover studies. Therapy with medium-chain triglyceride oil improved her malabsorption and favorably influenced the absorption of her medications.