3,5-Diiodo-L-thyronine (3,5-T2), a potential metabolite of 3,3',5-triiodothyronine (T3), is an active thyroid hormone. It acts as an alternative ligand for thyroid hormone receptor beta. 3,5-Diiodo-L-thyronine has the capacity to stimulate hepatic lipid catabolism but acts by different from T3 molecular mechanisms to achieve this effect.

Arabinitol is the five-carbon sugar alcohol D-arabinitol (DA). It is a metabolite of the pathogenic Candida species, in vitro as well as in vivo, and can be determined by gas chromatography or enzymatic analysis. Endogenous DA and L-arabinitol (LA) are present in human body fluids. Serum DA and LA increase in renal dysfunction. In prospective clinical studies, elevated DA/LA or DA/creatine ratios in serum or urine have been found in immunocompromised, usually neutropenic, patients with invasive candidiasis. In addition, positive DA results have been obtained several days to weeks before positive blood cultures, and the normalization of DA levels has been correlated with therapeutic response in both humans and animals. Thus, arabinitol has been suggested a marker for invasive candidiasis. A non-invasive, non-culture-based method of determining urinary D-/L-arabinitol (D-/L-ARA) ratios was investigated as a tool for the diagnosis of invasive candidiasis in nosocomial paediatric infection cases in the clinical trial.