Figure 2 - Efficacy of Oxy-Nil synthetic and natural antioxidants.
0.60 0.80 1.00 1.20 1.40
0.20 0.40
0.00 Control (Linseed)
Oxy-Nil Nat AOX
Oxy-Nil Synthetic AOX 1,39 1,24 1,00
Oxidation degradation in feed can take place throughout the entire feed chain and reduces the quality of feed ingredients.
• Finally, a synergistic effect between antioxidants is guaran- teed in certain specific conditions. For example, in a blend of butylated hydroxyanisole (BHA)-propyl gallate, after the first antioxidant action of the BHA and propyl gallate mole- cules, the secondary metabolite of BHA and propyl gallate will combine and result in the formation of heterodimers that have an antioxidant activity which is more efficient then the activity of BHA or propyl gallate alone.
Satisfying regulations and consumer needs There are many sources and forms of antioxidants. Adisseo offers a diverse portfolio of synthetic antioxidant systems for fats, oils, premixes and complete feeds, as well as natural an- tioxidant alternatives in both dry and liquid forms. These anti- oxidant blends contain synergistic mixes of antioxidants to absorb free radicals, metal chelators to bind metal ions and oil-based carriers to ensure optimal homogeneity in the fat/ oil or feed matrix, the combination of which produces a sta- ble solution that is more effective than single-component an- tioxidants. Given the changing nature of regulations and po- tential safety concerns, antioxidants are becoming more and more of a specialty business. Consequently, Adisseo has in- vested and innovated significantly in its antioxidant product line, Oxy-Nil, to guarantee safe and effective feed additives, and to provide valuable solutions for the global feed industry. One of the proven success stories of the antioxidant portfolio is the synergistic combination of a blend of butylated hy- droxyanisole (BHA)-butylated hydroxytoluene (BHT)-propyl gallate antioxidants and chelating agents. This synergistic
blend has been available to the animal feed industry for sev- eral years now and has been shown to offer high levels of effi- cacy. Propyl gallate is able to restore and increase the effects of BHA and BHT threefold in some instances, by transferring hydrogen ions from its three active sites to oxidised (spent) BHA or BHT molecules. In addition, the effectiveness of an antioxidant depends on multiple factors, including the substrate, antioxidant dose, chemistry synergy, and time and place of application. Consid- ering the wide variability of fats and oils, and the valuable mineral nutrient premix used today, the need for oxidation control solutions designed specifically with variability in mind is increasing (see Figure 2). To meet the emerging need for natural antioxidants, tests are being carried out with new possible ingredients with poten- tial antioxidative properties. For instance natural plant-based antioxidants consisting of synergistic mixes of natural toco- pherols, rosemary extract, chelators and emulsifiers can be used for complete protection against oxidation. Mixed tocopherols contain α, β, γ and δ homologues, each of which has a different biological and antioxidant activity. The δ homologue is known to have a more superior antioxidant activity while α-tocopherol is known to be easily absorbed in vivo, hence promoting better vitamin-E activity. Consequent- ly, the efficacy and value of natural antioxidants is based on higher delta-gamma ratios, the delta difference. The higher ratio of delta tocopherols in combination with a lecithin che- lator and rosemary extract support an efficient natural anti- oxidant blend for the feed industry.
▶ ALL ABOUT FEED | Volume 29, No. 7, 2021 23
Protection factor
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