Fresh, Frozen and Canned Produce: Nutrient Differences
What one university study and official guidance say about vitamins in fresh versus frozen produce, how canned fruit and vegetables count, and what to check on the label.
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The question
Is frozen or canned produce nutritionally different from fresh? The honest answer from the sources we read is "it depends on the food and the nutrient," and for canned produce we did not find a good comparison. Nothing here is a diet plan; it describes what was studied.What the sources found
| Question | What the source found | Strength of evidence |
|---|---|---|
| Vitamins in frozen versus refrigerated fresh produce | A study of eight foods measured four vitamins and concluded frozen was comparable to and occasionally higher than fresh [1] | One laboratory study; promising but limited |
| Vitamin C (ascorbic acid) | No significant difference in five of eight foods, and higher in frozen than fresh in the other three [1] | One laboratory study |
| Beta-carotene | Lower in frozen peas, carrots and spinach; the authors noted a drastic decrease in some foods [1] | One laboratory study |
| Does freezing reduce nutrients? | FDA states that freezing does not reduce nutrients [2] | Agency statement (no study cited on the page) |
| Canned versus fresh or frozen nutrients | Proper evidence not found in the sources we read | Insufficient evidence |
| Do canned and frozen count as produce? | The NHS says 80g of fresh, canned or frozen fruit and vegetables counts as one portion of 5 A Day [3] | Official guidance (UK) |
What the study actually did
The eight foods were corn, carrots, broccoli, spinach, peas, green beans, strawberries and blueberries. The "fresh" samples were stored in the refrigerator and analyzed at three storage times, so the comparison is frozen against refrigerated stored produce, not against produce eaten the day it was picked. [1] Four vitamins were measured (ascorbic acid, riboflavin, alpha-tocopherol, beta-carotene); other nutrients, fiber and plant compounds were not part of that study. These are laboratory measurements of nutrient content, not health outcomes in people.Canned produce
For canned fruit and vegetables, official advice in the sources we read is about what is added. The NHS suggests choosing those in natural juice or water with no added sugar or salt. [3] FDA advises buying low-sodium or no-salt-added canned vegetables, and says rinsing canned beans or vegetables before eating removes some of the sodium. [4] Readers on a sodium-restricted plan or with kidney or heart conditions should ask their clinician or dietitian what suits them.Proper evidence not found for how canning changes vitamins or plant compounds compared with fresh: we searched PubMed (canned versus fresh or frozen nutrient content) and did not find a review or trial we could read and cite.
Frequently asked questions
Does freezing destroy nutrients?
FDA states that freezing does not reduce nutrients. [2] In a study of eight foods, frozen produce was comparable to and sometimes higher than refrigerated fresh produce for four vitamins, though beta-carotene fell in some foods. [1]
Is frozen better than fresh?
We found no source that ranks them. In the study we read, results varied by food and vitamin. [1]
Do canned vegetables count as vegetables?
The NHS says canned fruit and vegetables count toward 5 A Day, and recommends choosing those with no added sugar or salt. [3]
How can I lower the sodium in canned vegetables or beans?
FDA says rinsing sodium-containing canned foods such as beans and vegetables before eating removes some of the sodium. [4]
Is there any safety concern with canned goods?
FDA lists swelling, leakage, punctures, holes, fractures and extensive deep rusting as signs of can damage. [2] Ask a food-safety authority or healthcare provider if you are unsure about a damaged can.
More details: evidence, limits and cautions
The details behind this page: cautions, limits of the evidence and where sources disagree. Open any note to read it.
Freezing and safety
Limits and uncertainty
- One study, eight foods, four vitamins: do not generalize to all produce.
- Results differ by food (for example, riboflavin was higher in frozen broccoli and lower in frozen peas). [1]
- Fresh produce eaten soon after harvest was not what this study compared.
- Sauces and seasonings added to frozen or canned products change salt, sugar and fat; FDA suggests frozen vegetables without sauce or seasoning. [4]
Who should ask a clinician
References
- Bouzari A, Holstege D, Barrett DM. Vitamin retention in eight fruits and vegetables: a comparison of refrigerated and frozen storage. J Agric Food Chem 2015;63(3):957-62. Read 2026-10-23.
- U.S. Food and Drug Administration. Are You Storing Food Safely? Consumer Update, content current as of 18 January 2023. Read 2026-10-23.
- NHS (UK). 5 A Day: what counts?. Read 2026-10-23.
- U.S. Food and Drug Administration. Sodium in Your Diet. Read 2026-10-23.