Linseed oil is reach in linolenic acid, an Ω3 fatty acid that may play a crucial role in improving the pregnancy rate in dairy cows. It is known that an incorrect ratio between Ω3 and Ω6 favors pregnancy losses. An excess of Ω6 enhances pro-inflammatory mechanisms that negatively influence the follicular maturation and the embryonic engraftment. A correct supplement of Ω3 exerts an anti-inflammatory effect and stimulates the progesterone production. The ideal ratio between Ω3 and Ω6 should be ≤ 2.5, while, in the modern diets, it ranges from 5 to 12/1, due to the presence in of ingredients rich in Ω6, like corn, sunflower, soybean etc. (Zanetti et al., 2017). This incorrect ratio favors hormonal dynamics that increase the risk of embryos resorption.
Literature reports that Ω3 fatty acids from fish oil or linseed oil may give comparable results on the reproductive efficiency of cows (Moallem et. al, 2013).  Therefore, the supplementation of Ω3 from linolenic is an effective approach to improve the pregnancy rate in cows.

A common method to supplement the cows’ diets with linolenic acid is to add extruded linseeds to the feed. The limit of extruded linseeds is represented by their low rumen-bypass rate, resulting in a very low intestinal absorption of the linolenic acid: only 7% of linolenic acid contained in extruded linseed is absorbed in the gut (A.L Lock et al., 2006). Therefore, high dosages are needed with consequent negative impact on the feed cost. Moreover, the extruded linseed may contain from 10 g/kg to 86.8 g/kg of hydrocyanic acid (HCN) which, in the rumen, turns into cyanide with negative effects on the production and reproductive efficiency of the cow.

SILO’s research has focused on optimizing the vector able of carrying linolenic acid in the small intestine, without providing hydrocyanic acid and with a significant economic advantage for the feed producer and the farmer.

Ω3L is an efficient and economically sustainable vector to deliver linolenic acid from linseed oil to the intestine of the cows without risks of hydrocyanic acid presence.

To further support the fertility rate, NAUTILUS Ω3L is enriched with Vitamins, DL-Methionine, Lysine HCl and Choline Chloride.


500 grams of extruded linseed can be replaced with the pure by-pass linseed oil contained in 300 grams of NAUTILUS Ω3L with significant technical-economic advantages.

With 300 grams of NAUTILUS Ω3L we can replace also 300 g of soybean meal, 21 g of Smartamine, 75 g of by-pass lipids and provide the same amount of rumen-bypass Linolenic acid as 500 grams of extruded linseed (Adam L. Lock et al. 2006), but with a SAVING of 30% on feed costs.

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