Pesticide.net Publishes Article on PURE Bioscience's Antimicrobial Technology.

SAN DIEGO -- Leading Industry Journal Highlights Quick Kill, 24 Hour Residual and Low Toxicity of Silver Dihydrogen Citrate 

PURE Bioscience (OTCBB:PURE) today announced that the August 30, 2004 edition of Insider eJournal(TM), a publication of Pesticide.net(TM), features an article on PURE's silver dihydrogen citrate antimicrobial technology.

Pesticide.net, located at www.pesticide.net, is the world's leading resource for news, analysis and regulatory information on conventional, biological, biotech and antimicrobial pesticides. The recent Insider eJournal article, "New Silver Antimicrobial Products Pose Threat to Older Hard Surface Disinfectants" provides an introduction and overview of PURE's silver dihydrogen citrate disinfectants, including the products' competitive advantages.

The article contrasts previously EPA registered silver compounds which are primarily "slow-acting, lower-level bacteriostatic material preservatives incorporated into other products" with PURE's new silver dihydrogen citrate which "is being positioned to compete head-to-head with faster-acting, higher-level hard surface disinfectants, such as alcohol and quaternary ammonium based products." The article also notes that PURE's disinfectant product is classified as EPA Toxicity Category IV, or minimally toxic, while "having the efficacy of more toxic traditional hospital disinfectants."

Michael Krall, president and CEO of PURE Bioscience, is quoted in the article as saying that PURE has filed over 20 patents so far and expects eventually to file for several hundred patents. Krall added that PURE envisions its product as becoming "the NutraSweet(R) of disinfectant additives."

PURE recently announced its strategic alliance with Clean Control Corporation of Warner Robins, Ga, to accelerate sales of PURE's silver dihydrogen citrated based hard surface disinfectant. Stephen Davison, founder and president of Clean Control, told Insider, "I think the sky's the limit for this molecule...let's face it, you haven't had a new disinfectant come along in a long, long time." Davison added, "To have a Category IV product that kills bacteria in 30 seconds as opposed to (periods of) minutes and have a 24-hour residual effect -- that's pretty strong."

New Antimicrobial Supersedes Existing Products

PURE Bioscience's innovative new molecule, silver dihydrogen citrate (SDC), is an electrolytically generated source of stabilized ionic silver that can serve as the basis for a broad range of products in diverse markets. SDC liquid is colorless, odorless, tasteless, non-caustic and formulates well with other compounds. SDC-based antimicrobial technology is distinguished from competitors in the marketplace because of its superior efficacy combined with reduced toxicity. Silver dihydrogen citrate was invented by Andrew B. Arata, Director of Research and Development for PURE's Bioscience Division.

PURE currently has Environmental Protection Agency (EPA) registration for its 2400-parts per million (ppm) technical grade SDC concentrate (trade name Axenohl(R)) as well as for its Axen(R) and Axen(R)30 hard surface disinfectant products for commercial, industrial and consumer applications including restaurants, homes and medical facilities.

Axen30, PURE's first commercialized SDC product, is a powerful hard surface disinfectant. The efficacy of Axen30 exceeds that of most leading commercial and consumer products while maintaining a lower toxicity rating. EPA registered claims for Axen30 include a 30 second kill time and a 24 hour residual kill on standard indicator bacteria, a 2 minute kill time on some resistant strains of bacteria including MRSA and VRE, 10 minute kill time on fungi, 30 second kill time on HIV Type I, and 10 minute kill time on other viruses. Recently, PURE attained EPA registration of expanded claims for its Axen30 hard surface disinfectant to include use on hard surfaces in childcare facilities. PURE previously registered Axen30 for disinfection of hard surfaces including those in restaurants, homes and medical facilities. The EPA's registrations of Axen30 for use on sensitive children's use sites emphasizes the "least-toxic" characteristics of Axen30 while expanding its versatility in the professional and consumer disinfection markets.

In addition to EPA registered uses of SDC technology, PURE, in conjunction with Therapeutics, Incorporated, is pursuing the development and commercialization of Food and Drug Administration (FDA) regulated SDC-based healthcare products.

About Pesticide.net

Pesticide.net, located at www.pesticide.net, is the world's most comprehensive source of news, analysis and regulatory information on conventional, biological, biotech and antimicrobial pesticides. The site includes continually updated basic content including more than ten thousand full-text source documents, including news releases, laws, regulations, hard to find guidance and policy statements, data compensation awards, federal register notices, PR Notices, court decisions, enforcement cases, registration resources and a calendar of meetings and events. Pesticide.net is also home to Insider eJournal, which covers the "inside" story on issues important to registrants, regulators, scientists and policy activists with professionally written articles, analysis and other features that are unavailable from any other source. It is published bi-weekly, twenty-four times a year, and requires a paid subscription.

About PURE Bioscience

PURE Bioscience (PURE) develops and markets technology-based products in the bioscience and water treatment sectors to provide non-toxic solutions to global health challenges. PURE's proprietary high efficacy/low toxicity bioscience technologies, including its silver dihydrogen citrate antimicrobials and Triglycylboride(TM) pesticides, represent innovative advances in diverse markets. PURE is currently America's leader in pharmaceutical water purification with its Fillmaster(R) equipment, and the Company has expanded into residential water treatment with its Nutripure(R) water filtration systems. PURE Bioscience is headquartered in El Cajon, Calif. (San Diego metropolitan area) and its common stock is listed on the OTC Bulletin Board under the symbol "PURE." Incorporated in 1992, PURE Bioscience was formerly named Innovative Medical Services.

This press release includes statements that may constitute "forward-looking" statements, usually containing the words "believe," "estimate," "project," "expect" or similar expressions. These statements are made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. Forward-looking statements inherently involve risks and uncertainties that could cause actual results to differ materially from the forward-looking statements. Factors that would cause or contribute to such differences include, but are not limited to, acceptance of the Company's current and future products and services in the marketplace, the ability of the Company to develop effective new products and receive regulatory approvals of such products, competitive factors, dependence upon third-party vendors, and other risks detailed in the Company's periodic report filings with the Securities and Exchange Commission. By making these forward-looking statements, the Company undertakes no obligation to update these statements for revisions or changes after the date of this release.