Curiosity about probiotic bacteria is high. This is not surprising giv
en the rapid growth of the natural products market in the USA, which w
as 22 % in 1995 (New Hope Natural Media, Boulder, CO). Although probio
tic cultures are only one component of that market, this trend shows t
hat consumers in the USA are increasingly taking a pro-active stance t
owards their health and are purchasing products not only to eliminate
what is perceived as dietary negatives but to increase the levels of d
ietary positives (Wrick, 1995). This shift in consumer attitude bodes
well for the development of the American probiotic market. This articl
e describes the composition, promotion and labelling of probiotic-cont
aining products, discusses attributes of commercial probiotic bacteria
, and estimates the size of the probiotic market in the USA. This mark
et information was obtained from several published (Anon, 1996a,b) and
unpublished but commercially available (SPINS Information Services, S
an Francisco, CA and New Hope Natural Media, Boulder, CO) sources.