That being said, some research also suggests that frozen produce may retain its antioxidant activity despite the loss of water-soluble vitamins ( 6 , 7 ). Bottom Line: Blanching results in a loss of antioxidants, B-vitamins and vitamin C. However, nutrient levels remain fairly stable after freezing. 15 июн. 2017 г.
Do Frozen vegetables lose vitamin C?
Blanching caused a decrease in vitamin C and folic acid, whereas freezing affected vitamin C and carotene. Frozen produce may also lose nutrients the longer they are frozen. They should be used within 8 months to 1 year of purchase.
At what temperature will vitamin C be destroyed?
Vitamin C and heat Vitamin C begins to denature at temperatures as low as 86 °F, according to a study in the International Journal of Scientific and Technology Research. The negative effects of heat increase significantly at 140 and even more at 170 °F.
Does food lose vitamins when frozen?
Generally, frozen foods retain their vitamins and minerals and there is no change to the carbohydrate, protein or fat content. In some cases, frozen foods have more vitamins and minerals compared to fresh because fresh foods lose vitamins and minerals over time while freezing preserves nutrients.
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