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Steph Grasso, MS, RD@stephgrassodietitianTikTok

Sheet-pan smashed frozen Brussels sprouts (Full recipe is in my cookbook—linked in my …more

original sound — @stephgrassodietitian

what it claims

Frozen vegetables are just as nutritious, and sometimes even more so, than fresh vegetables, because immediate freezing after harvest preserves their vitamins and minerals, unlike fresh produce which naturally loses nutrients during transport and storage in our refrigerators.

holds up

This claim is based on particularly solid scientific evidence. A comparative study from the University of California, Davis (published in the *Journal of Agricultural and Food…

noli's read

This claim is based on particularly solid scientific evidence. A comparative study from the University of California, Davis (published in the *Journal of Agricultural and Food Chemistry* in 2015) analyzed several plants and revealed that the vitamin content (such as vitamin C or E) of frozen products is generally equivalent, and sometimes superior, to that of fresh products. Furthermore, a comparative study conducted by the University of Georgia (published in the *Journal of Food Composition and Analysis* in 2017) simulated standard five-day storage in a home refrigerator. Researchers observed that fresh vegetables rapidly lose a portion of their antioxidants and folates over several days, while rapid freezing immediately after harvest locks in these valuable nutrients at the peak of their vitality. Some nuances exist depending on the varieties: certain compounds that are very sensitive to heat, such as the beta-carotene in some vegetables, may decrease slightly during the blanching step before freezing. Nevertheless, for the vast majority of nutrients, the equivalence is excellent, making frozen vegetables a practical, economical, and highly nutritious daily option.

the sources

  1. 1Rickman JC, Barrett DM, Bruhn CM 2007
  2. 2Rickman JC, Bruhn CM, Barrett DM 2007

Claimed by Steph Grasso, MS, RD. Noli grades the claim, never the person.

Decoded by Noli · July 13, 2026 · the original post

What the graded evidence says

Evidence
B
Effect
vitamin and phytochemical retention, fresh vs frozen — freezing preserves nutrient value comparably to fresh; fresh produce can lose vitamin C and B vitamins during storage and cooking, so exclusive 'fresh is best' recommendations aren't supported
Measured on
general population (food-composition analyses)

What’s uncertain

Exact nutrient differences depend on the specific food, storage time, and how you cook it, so neither fresh nor frozen wins across the board. Both are good choices.

Steph Grasso, MS, RD in the Register88 claims graded · solidity 92/100See their record →

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