SPECIAL STORY 74 FEED & ADDITIVE MAGAZINE September 2023 cent dsm-firmenich OVN™ webinars have reviewed experimental data extracted from more than 50 papers on individual vitamins published during the last 10 years (information available through the authors). Some examples of this research are in figures 1-3 and table 1. Nevertheless, vitamins play complementary catalytic roles on important metabolic processes with multiple interactions among them. Therefore, we might not see the full effect of increasing levels of individual vitamins if levels of other vitamins are a limiting factor and we must better understand and quantify the effect of good levels of all vitamins in the same diet since probably we will not find an additive effect of all benefits seen in the individual vitamin trials. Poulsen and Krogsdahl (2018) compared the OVN™ supplementation levels against the Danish standard recommendations (Table 2) in 1,250 weaning piglets from 7 to 30 kg of weight and concluded that the OVN™ supplementation significantly improved daily weight gain, feed conversion ratio and production value (Table 3). Hinson et al. (2022) confronted the average vitamin supplementation levels used by swine producers in the United States, which are close to OVN™ recommendations, and a reduced vitamin level, either to NRC recommendations for vitamins A, D, E and K (NRC, Nutrient requirements of swine, 2012) or half (or even lower) the industry average for B-vitamins. Feeding the lower vitamin levels to sows (n=245) tended to Figure 1. Average daily gain (g) and Gain: Feed in weaned piglets from 8 to 14 days post-weaning of age, fed diets with different levels of vitamin A (Source: Wang et al., 2020) Figure 2. Effect of 25OHD3 (HyD®) in sows’ gestation and lactation diet on performance parameters of pre-weaning piglets (Source: Upadhaya et al., 2022)
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