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Sunflower seeds benefits center on vitamin E: one ounce of dry roasted kernels supplies about half the Daily Value, and NIH lists sunflower seeds near the top of its vitamin E food table. The same ounce provides a large share of copper and selenium, plus folate, phosphorus, protein and fiber, according to USDA data. Specific health research on the seeds themselves is limited, so the case for them rests on nutrition, not on proven effects. Below is a USDA nutrition chart, how sunflower seed butter compares, the salt in seeds sold in the shell, and a safety point many snack eaters never hear about: swallowed shells.
Peptide Labs does not sell foods or sunflower seed products, and this article is general nutrition information, not medical advice.
Key Takeaways
- An ounce of dry roasted sunflower kernels has about 49% of the Daily Value for vitamin E in USDA data.
- The same ounce supplies roughly 58% of the Daily Value for copper and 41% for selenium.
- Sunflower fat is mostly omega-6 polyunsaturated fat, with very little plant omega-3.
- Salted seeds add sodium quickly; unsalted versions have almost none.
- Swallowing large amounts of shells can cause seed bezoars, a documented cause of severe constipation.
Sunflower seed nutrition: USDA chart
Values come from the USDA FoodData Central SR Legacy database, converted to a 1-ounce (28 g) serving of kernels or a 2-tablespoon (32 g) serving of sunflower seed butter. Percent Daily Value (%DV) uses FDA Daily Values for adults. FDC IDs: dried kernels 170562, dry roasted kernels without salt 170563, sunflower seed butter without salt 170155.
| Per serving | Kernels, dried, 1 oz | Kernels, dry roasted, 1 oz | Seed butter, 2 tbsp |
|---|---|---|---|
| Calories | 166 | 165 | 197 |
| Protein | 5.9 g (12% DV) | 5.5 g (11% DV) | 5.5 g (11% DV) |
| Fat | 14.6 g | 14.1 g | 17.7 g |
| Fiber | 2.4 g (9% DV) | 3.1 g (11% DV) | 1.8 g (7% DV) |
| Vitamin E | 10.0 milligrams (66% DV) | 7.4 milligrams (49% DV) | 7.3 milligrams (49% DV) |
| Copper | 57% DV | 58% DV | 57% DV |
| Selenium | 27% DV | 41% DV | 61% DV |
| Magnesium | 92 milligrams (22% DV) | 37 milligrams (9% DV) | 100 milligrams (24% DV) |
| Phosphorus | 15% DV | 26% DV | 17% DV |
| Folate | 16% DV | 17% DV | 19% DV |
| Thiamin | 35% DV | 3% DV | 1% DV |
| Zinc | 1.4 milligrams (13% DV) | 1.5 milligrams (14% DV) | 1.6 milligrams (14% DV) |
| Sodium, unsalted | 3 milligrams | 1 milligram | 1 milligram |
| Sodium, salted dry roasted | Not listed | 186 milligrams (8% DV) | Not listed |
Two things stand out. First, the vitamin E, copper and folate figures are consistent across every form. Second, some minerals and vitamins differ sharply between the USDA entries: dried kernels list far more magnesium and thiamin than dry roasted kernels, while roasted kernels list more selenium and phosphorus. Selenium in plant foods depends heavily on the soil the plants grew in, and these entries come from different samples, so consider the numbers approximate. The NIH Office of Dietary Supplements (ODS) vitamin E table matches the roasted figure exactly: 7.4 milligrams per ounce, 49% DV.
Sunflower seeds benefits: vitamin E, copper and selenium
Vitamin E
Vitamin E is a group of fat-soluble compounds with antioxidant activity. ODS names nuts, seeds and vegetable oils as among the top sources of alpha-tocopherol, the form the body uses, and in its food table only wheat germ oil ranks above an ounce of dry roasted sunflower seeds. The adult Recommended Dietary Allowance and the Daily Value are both 15 milligrams. ODS also notes that research has not found any adverse effects from vitamin E in food; the cautions about vitamin E apply to high-amount supplements, which is a separate question for your clinician.
Copper and selenium
ODS lists seeds and nuts among the richest dietary sources of copper, with toasted sunflower seed kernels in its copper food table. An ounce of kernels covers more than half the Daily Value. High zinc intake can lower copper levels, which our copper supplement guide explains. Selenium is the other standout, although the amount varies with growing soil. If you also eat Brazil nuts or take a multivitamin with selenium, our selenium guide explains why total intake from all sources matters.
Folate, thiamin and other B vitamins
Sunflower kernels also supply folate and, in their dried form, a good share of thiamin, along with vitamin B6 and niacin. Our vitamin B complex guide explains what each B vitamin does and how labels list them.
Fats and protein
Like most seeds, sunflower kernels are about half fat. In the dry roasted USDA entry, most of it is polyunsaturated, almost entirely the omega-6 linoleic acid, with very little plant omega-3. Some sunflower varieties are bred to be high in monounsaturated fat, which is one reason values differ between products. For omega-3s, chia seeds and our omega-3 guide are better starting points. Protein is moderate at about 5 to 6 grams per ounce, less than pumpkin seeds.
Are sunflower seeds good for you? Salt, calories and shells
For most people, sunflower seeds fit well into a varied diet. The Dietary Guidelines for Americans count seeds, sunflower seeds included, in the protein foods group and recommend unsalted nuts and seeds. A few practical points matter more than any single nutrient.
- Salt: unsalted kernels contain almost no sodium, but salted dry roasted kernels list about 186 milligrams per ounce, and flavored seeds sold in the shell are often much saltier because the seasoning coats the shell. Read the Nutrition Facts panel.
- Calories: about 165 calories per ounce of kernels and close to 200 per 2 tablespoons of seed butter. A small handful is easy to overshoot when snacking from a big bag.
- Shells: do not swallow them. Shells are indigestible, and doctors have published case reports of seed bezoars, compacted masses of shells that can block the lower bowel.
- Allergies: sunflower seeds are not one of the nine major food allergens that the FDA requires labels to declare, so people with a seed allergy need to read full ingredient lists, including on products that use sunflower oil or lecithin.
What the bezoar case reports describe
A 2025 case report from the University of California, San Francisco describes an 11-year-old who developed abdominal pain, constipation and rectal bleeding about a week after eating a large bag of unshelled, flavored sunflower seeds. Laxatives and an enema did not help, imaging confirmed a sunflower seed bezoar, and it was removed under general anesthesia. A 2024 report describes a 48-year-old woman with seed masses in both the stomach and the rectum. The authors of that report note that most seed bezoars can be managed without surgery and that life-threatening complications are rare. Still, severe constipation after eating a lot of seeds in the shell, especially in a child, is a reason to see a clinician promptly.
Sunflower seed butter
Sunflower seed butter is ground roasted kernels, often with added salt, sugar or oil. In USDA data, 2 tablespoons of the unsalted version provide about half the Daily Value for vitamin E and more than half for copper and selenium, with about 5.5 grams of protein. Because sunflower seeds are not a peanut or tree nut, the butter is a common alternative in peanut-free settings, but people with allergies should check the label for cross-contact statements. Some brands use high-oleic seeds, which shifts the fat profile toward monounsaturated fat; the Nutrition Facts panel tells you which.
Sunflower seeds vs pumpkin seeds
The two seeds complement each other. Per ounce in USDA data, sunflower kernels win clearly on vitamin E and selenium, while pumpkin seeds supply roughly four times the magnesium of roasted sunflower kernels, more zinc and iron, and more protein. Our guide to pumpkin seeds has the full chart. Both supply plenty of copper, and both are mostly omega-6 fat. If protein is your focus, see our list of high protein foods.
Frequently Asked Questions
What are the main sunflower seeds benefits?
Nutrition. An ounce of dry roasted kernels supplies about 49% of the Daily Value for vitamin E, 58% for copper and 41% for selenium in USDA data, plus folate, phosphorus and fiber.
Are sunflower seeds good for you?
As part of a varied diet, yes for most people. Choose unsalted versions, keep portions small and do not swallow the shells.
Is it bad to eat sunflower seed shells?
Yes, avoid swallowing them. Shells are indigestible, and case reports describe bezoars that blocked the bowel after people ate large amounts.
How much vitamin E is in sunflower seeds?
About 7.4 milligrams per ounce of dry roasted kernels, 49% of the Daily Value, according to both USDA and NIH.
Is sunflower seed butter as nutritious as the seeds?
It is similar per gram. Two tablespoons provide about half the Daily Value for vitamin E; check the label for added sugar and salt.
Are sunflower seeds a common allergen?
They are not one of the nine major allergens on FDA labeling rules, but seed allergies do occur, so read full ingredient lists.
Questions about a label? Contact us or read our Buyer’s Guide. Food comes first; follow the label and ask a healthcare provider before starting a supplement, especially if you take medicines or are pregnant. These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
Last reviewed October 2026.
Related guides: Vitamin E Supplement: Benefits, Risks and What Trials Found, Pumpkin Seeds Benefits: USDA Nutrition, Pepitas vs Whole Seeds and the Evidence, Chia Seeds Benefits: Nutrition, Research and Side Effects.