One of the fundamental principles of food technology is that at low pH most bacteria cannot survive. Salt, sugar and acids are three of nature's own preservatives that can protect foods from microbial spoilage. Against this background claim by a Swedish food company to have developed a juice product containing probiotic strains of bacteria is a break through worth watching. It is remarkable that the juice products containing the active cells are able to stand the thermal processing schedule under acidic conditions, assuming this is the method used, without affecting the viability of the culture.
"Swedish dairy pioneer, Skånemejerier, has extended its Scandinavian-leading juice range, Bravo, to incorporate probiotic strains, believed to be the first in the world to do so in a fresh 100 per cent juice product with a cold-fighting claim.The new products, called Bravo Friscus, come in the form of one-litre 100 per cent apple and orange juices cartons and incorporate two probiotic strains that have been clinically proven to resist colds and flus".
The strains of cultures used L.plantarum and L.paracasei are specially developed for their ability to withstand the acidic environment of the juice and the recipe is designed such a way that the cells are kept alive during storage and distribution. The product is supposed to contain about one billion 'colony forming units' (cfu) per 250 ml serving. However the claim that the product can protect one from cold and flu may be a bit far fetched and probably designed to exploit the current near panic situation vis-à-vis swine flu all over the world..
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