There were no significant differences on folate concentrations
between the two seasons evaluated (winter
and spring) for any samples.
Retention of folates in leafy vegetables was
strongly dependent on each vegetable, the method of
cooking and the isomeric form. Stir frying preserved
the concentration of this vitamin in vegetables, while
boiling was the method that caused the greatest losses
of THF and 5-FTHF.
As the tests were conducted on laboratory scale, simulating
domestic preparation, it is necessary to perform
further studies to assess folate losses after the
stages of handling and preparation on a large scale, as
the foodservices, increasing information about the nutritional
quality of vegetables consumed routinely
There were no significant differences on folate concentrationsbetween the two seasons evaluated (winterand spring) for any samples.Retention of folates in leafy vegetables wasstrongly dependent on each vegetable, the method ofcooking and the isomeric form. Stir frying preservedthe concentration of this vitamin in vegetables, whileboiling was the method that caused the greatest lossesof THF and 5-FTHF.As the tests were conducted on laboratory scale, simulatingdomestic preparation, it is necessary to performfurther studies to assess folate losses after thestages of handling and preparation on a large scale, asthe foodservices, increasing information about the nutritionalquality of vegetables consumed routinely
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