Plant sterols are naturally occurring fats that are present in fruits, vegetables, and other plants. Two of these plant sterols – beta-sitosterol (BSS) and its glycoside (BSSG) – have been shown, even at very low levels, to enhance the activity of cells that are well known to have positive immune system activity. In particular, these two plant sterols enhance the activity of the T-helper cells. The T-helper cells are arguably the most important cells in adaptive immunity, because they are required for almost all adaptive immune responses. The T-helper cells not only help activate B cells to secrete antibodies and macrophages to destroy ingested microbes, they also help activate cytotoxic T cells to kill infected target cells. ModucareVET improves the ratio of T-helper 1 to T-helper 2 cells, and, as a result, the companion animal's cellular immunity is enhanced and overactive immune responses are down-regulated. The potential of Moducare® to optimize immune function in humans has been demonstrated in clinical studies.

ModucareVET also helps maintain a normal ratio of two hormones produced by the adrenal gland – cortisol and DHEA. An optimal balance of these hormones helps to buffer negative stress responses as they occur. ModucareVET is for dogs, cats, and horses.