Cita:
Despite having significantly lower intakes of
EPA and
DHA (associated with fish consumption), blood levels of EPA and DHA in vegans and vegetarians were approximately the same as regular fish eaters, according to findings published in the
American Journal of Clinical Nutrition.
The results indicate that when people do not consume adequate levels of EPA and DHA, like vegans and non-fish-eating vegetarians, their bodies respond by increasing the conversion levels of
ALA to EPA.
A pesar de tener la ingesta significativamente más baja de EPA y DHA (asociado con el consumo de pescado), los niveles de EPA y DHA en los vegetarianos y los veganos fueron aproximadamente los mismos que los de quienes comen pescado regularmente, según los resultados publicados en la revista American Journal of Clinical Nutrition.
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Study details
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Results showed that omega-3 intakes were between 57 and 80 percent lower in the non-fish-eaters, compared with fish-eaters. However, for plasma levels of DHA and EPA between the groups the differences were much smaller. Indeed, the average EPA level in fish eaters was 64.7 micromoles per liter, compared with 57.1, 55.1, and 50 micromoles per liter for non-fish-eating meat-eaters, vegetarians, or vegans. Furthermore, the average DHA level in fish eaters was 271 micromoles per liter, compared with 241.3, 223.5, and 286.4 micromoles per liter for non-fish-eating meat-eaters, vegetarians, or vegans.
Los resultados mostraron que la ingesta de omega-3 tenían entre 57 y 80 por ciento menor en los que no comen pescado, en comparación con quienes si comen pescado. Sin embargo, para los niveles plasmáticos de DHA y EPA entre los grupos las diferencias fueron mucho menores. De hecho, el nivel medio de la EPA en los comedores de pescado fue de 64,7 micromoles por litro, en comparación con 57.1, 55.1, y 50 micromoles por litro en el caso de quienes no se alimentan con pescado, los vegetarianos o veganos. Por otra parte, la media de nivel de DHA en los comedores de pescado fue de 271 micromoles por litro, en comparación con 241.3, 223.5 y 286.4 micromoles por litro para los q no se alimentan de pescado, los vegetarianos o veganos.
Cita:
“One explanation for this observation may be due to increased conversion, and our data suggest that the precursor-product ration from plant-derived ALA to circulating long chain n-3 PUFAs was significantly greater in non-fish eaters than in those who ate fish,” wrote the researchers.
“Although there have been many small, careful metabolic studies determining the extent of conversion, we believe this to be the first large population study to investigate intakes, status, and the precursor-product ratio by using statistical models as, surrogate, estimates of conversion of ALA to long chain n-2 PUFAs in different dietary habits.”
"Una explicación para esta observación puede ser debido a la conversión mayor, y nuestros datos sugieren que la ración de precursores de subproductos de origen vegetal ALA a circular de cadena larga n-3 PUFAs fue significativamente mayor en quienes no consumen pescado que en aquellos que comían pescado, "escribieron los investigadores.
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Welcome
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"Quantifying dietary intake of ALA, DHA and EPA and measuring plasma levels of ALA, DHA and EPA allowed the researchers to calculate a conversion ratio. While there were very large differences in dietary intake, plasma levels did not show the same degree of variation. The differences in plasma were much smaller than what would be expected and results suggested that the best conversion rates are by individuals that don't consume DHA and EPA.
"This study supports past research showing greater conversion in women versus men and higher conversion in non-fish eaters compared to fish eaters. Future studies are needed to expand our understanding of factors that influence conversion of ALA to DHA and EPA and outline the key physiological roles of ALA," he added.
"Cuantificación de la ingesta dietética de ALA, DHA y EPA y la medición de los niveles plasmáticos de ALA, DHA y EPA permitió a los investigadores a calcular un índice de conversión. Si bien existen diferencias muy grandes en el consumo de la dieta, los niveles plasmáticos no mostraron el mismo grado de variación. Las diferencias en el plasma fueron mucho menores que lo esperado y los resultados sugieren que