Pregnanetriol is a steroid metabolite of progesterone. Elevated levels of pregnanetriol in urine indicate a disruption of adrenal steroidogenic pathways.

Prostaglandin F1 alpha is a stable metabolite of prostacyclin, a powerful inhibitor of platelet aggregation as well as a potent vasodilator. Prostaglandin F1a is derived mainly from prostaglandin E1 and is metabolized to 6-keto prostaglandin F1a. It was shown, that the fluctuating prostaglandin F1 alpha levels were of clinical significance in the management of vasomotor tone and platelet function, common problems in the care and the prevention of hemorrhage in critically ill infants.

Alpha-carotene is a provitamin A carotenoid present in fruits and vegetables. Higher serum concentrations of α-carotene have been associated with lower risk of cancer and all-cause mortality. It was suggested that genetic variants influence serum concentrations of provitamin A. Recently was found, that α-carotene effectively inhibits Lewis lung carcinoma (LLC) metastasis and suppresses lung metastasis in combination with taxol in LLC-bearing mice, suggesting that Alpha-carotene could be used as an anti-metastatic agent or as an adjuvant for anti-cancer drugs.