ISSUE FOCUS 28 FEED & ADDITIVE MAGAZINE May 2024 META-ANALYSIS AS PRODUCTIVITY ENHANCER: EXCENTIAL ENERGY PLUS VS OTHER EMULSIFIERS Nutritional emulsifiers can be based on several types of active ingredients, with all different areas of specialty. Measuring the hydrophilic-lipophilic balance (HLB) value of emulsifiers is an interesting way to classify the products and to find out whether they are lipophilic (for a mix of water in oil) or hydrophilic (for a mix of oil in water). Lipophilic emulsifiers with a low HLB value, such as phospholipids, are commonly known as technical emulsifiers that improve the feed production process. On the other hand, hydrophilic emulsifiers with a high HLB value, such as the specific GPGR used in Excential Energy Plus, are nutritional emulsifiers improving the emulsification in the watery environment of the gastro-intestinal tract. This clearly explains the need to differentiate the types of emulsifiers in vivo. A second meta-analysis has been conducted to differentiate emulsifiers with variating HLB values. For that purpose, a second systematic review of scientific and commercial trials with Excential Energy Plus has been carried out, selecting specific studies answering the following criteria: • Performed in broilers; • Includes detailed information on the feed formulation and nutrient analysis; • Assess the effect of Excential Energy Plus as productivity enhancer (top-dressing); • Includes a control with a basal diet, supplemented with another commercial available emulsifier, and iso-caloric with the treatment diet; • Contains data on the growth performance, feed intake and feed efficiency of the birds; • Performed before the end of 2023. (Table 2) The same performance parameters as in the previous meta-analysis, for both treatments, were compiled. Statistical analysis was performed as in the first meta-analysis. Afterwards, the percentage of change when comparing the data in the Excential Energy Plus group with the other emulsifier group was calculated similarly to the first analysis. After studying the effect of each trial, the percentages of change were averaged and plotted per treatment and for each performance parameter. To conclude, applying 350 ppm of Excential Energy Plus is expected to numerically improve growth performance by 1.7%, feed efficiency by 2.8% and production efficiency by 2.5%, 7 Between 2014 and 2021 Belgium, Colombia, India, Netherlands, Poland, United Kingdom 8455 Ross 308, Cobb 430 Male, female, 50:50 male and female 34.1 Wheat-based (n=6), corn-based (n=1) Full fat soybean, palm kernel fatty acid, palm oil, poultry fat, soybean oil 2978.4 kcal/kg (2713 – 3164) metabolizable energy 6.89% (5.95 – 8.30) crude fat 21.00% (19.92 - 21.60) crude protein 350 ppm (n=7) Lysophospholipids (n=5), GPGR with a different HLB value compared to Excential Energy Plus (n=1), mixture of lysophospholipids, monoglycerides and synthetic emulsifier (n=1) 500 ppm (n=6), 1000 ppm (n=1) Number of selected studies Years of study completion Location of the study Total number of broilers Broiler breed Broiler sex Average days of life Main formulated cereals Main formulated fat sources Average dietary nutrients Dosage of Excential Energy Plus Active ingredients of the other commercial available emulsifiers Dosage of the commercial available emulsifiers TABLE 2
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