Agricultural Communications Documentation Center, Funk Library, University of Illinois Box: 207 Document Number: D13037
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6 pages, Kefirs are fermented beverages containing yeast and bacteria produced by the fermentation of water or milk with kefir grains. Because microorganism density may influence a product's health benefits, label accuracy regarding viable bacterial density and taxonomy of fermented foods is important. In this study, the microbiota of 5 commercial kefir products were measured quantitatively using standard plating techniques and characterized using high-resolution, long-read 16S rRNA gene amplicon sequencing. To enumerate viable lactic acid bacteria, 2 lots of each product were plated on de Man, Rogosa and Sharpe agar upon opening and following 14 d and incubated under anaerobic and aerobic conditions. Results revealed that 66% of products with a guaranteed count of colony-forming units per gram overstated microorganism density by at least 1 log, with only product E exceeding 1 × 109 cfu/g. Sequencing results demonstrated moderate product label accuracy in regard to taxonomy, yet several products contained bacterial species above the minimum detectable threshold (0.001% relative abundance) that were not included on the labels (e.g., Streptococcus salivarius, Lactobacillus paracasei). Our results demonstrate a moderate level of labeling accuracy for commercial kefir products intended for human consumption. Regulatory agencies and consumers must continue to scrutinize these products and demand a higher level of accuracy and quality.
7 pages, Pecans are a heart-healthy food, serving as an excellent source of unsaturated fatty acids, micronutrients, and phytochemicals. Despite rapid growth of the U.S. pecan export in global market, domestic pecan consumption has been stagnating, especially in attracting young consumers. This study seeks to investigate the effectiveness of nutrition education brochure that utilizes two information formats-rich media and traditional media-for promoting nutritional knowledge of pecans among young consumers. The experiment followed a between-subjects 2 x 2 design. Four versions of digital brochures were developed to manipulate two independent variables: video (absent vs. present) and recipe (absent vs. present). The findings indicated that including a video in the digital brochure can help increase consumers’ perceived information quality, and recipe content can help increase consumers' trust in the nutrition information and information source. The results also showed that for consumers with a lower prior knowledge regarding pecans, educational materials including a video were more effective than materials without a video. Such strategies to promote pecan consumption could benefit the pecan industry as well as public health.
