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A heap of sautéed onion slices

Onions, sautéed

Checked by us One serving: 85 g (about 1 cup chopped) · 105 kcal

Lots of omega-3: ALA. Much of the ALA comes from the oil it was cooked in.

Nothing to watch for most people.

On warfarin? Keep your vitamin K steady.

Good for

How we counted this

What one serving (85 g) gives you.

Your body needs enough of each of these. Past enough, more doesn’t help. Amounts are what the food databases list, not what your body absorbs, unless a row says it was measured.

The words: “A lot” means one serving gives 20% or more of Health Canada’s daily amount, “Some” 10% to 19%, “A little” 2% to 9%, “Almost none” under 2%. Strongest word first; within a word, protein and fibre lead, then the biggest share.

A milligram (mg) is a thousandth of a gram, and a microgram (µg) a thousandth of a milligram: 1,000 µg make 1 mg.

  • Omega-3: ALA

    The one omega-3 your body can’t make: it must come from food. Your cells build it into their membranes and burn it for energy.

    A lot

    Mostly from the cooking oil: the same weight raw has next to none.

    Learn more

    561 mg in one serving: 35% of the 1,600 mg a day men need, 51% of the 1,100 mg women need. The word follows the smaller share, which is the share of the higher amount.

    Source: How much of it gets in hasn’t been measured for this food yet. NIH Office of Dietary Supplements, omega-3 fatty acids fact sheet for health professionals

18 more nutrients below “a lot”

Missing from our databases for this food, so left out, not counted as zero: vitamin A, vitamin B12 and selenium.

Watch out

How we counted this
  • Acrylamide

    Nothing to watch

    You’d need about 10 servings a day, every day, of this food alone to double the acrylamide an average adult already gets. No dose is known to be safe, so doubling is where we flag.

    Learn more

    A serving a day adds 4.9–11% to what an average adult already takes in. There is no limit to take a share of.

    One serving carries 3.1 µg

    How we got this

    The dataset’s rating: Nothing to watch: doesn’t double average intake

    No safe threshold (EFSA benchmark dose lower limit (BMDL10) 0.17 mg/kg body weight/day; adult average 0.4-0.9 µg/kg body weight/day, 28-63 µg/day at 70 kg). At the mean, 36 µg/kg, an 85 g serving carries 3.1 µg, adding 4.9-10.9%; at the median, 14 µg/kg, 1.2 µg (+1.9-4.2%): far from doubling, so no cap. The single highest sample (420 µg/kg, 36 µg per 85 g) would add 57-127%; the rating uses the mean, and the maximum is shown so the spread is visible.

    Yoshida M, Isamu M, Chiku K. Acrylamide in stir-fried potato and onion for simmered dishes in Japan. Food Saf (Tokyo) 2017 Jun · grade B

    Every food with acrylamide

For some people

  • With warfarin: keep vitamin K intake consistent (label), not avoid.

    Learn more

    Eat a steady amount, not none. This line goes on every food whose serving gives 10% or more of the daily vitamin K; a few foods below that carry it too, where a source names them. One serving here has about 18 µg of vitamin K1.

Better options

How we counted this

“Better” here always means better at something the row names: more of one nutrient, more nutrients per serving, or the goal you pick. It never means better in every way.

Every amount below is for the same weight, 85 g, the size of one serving of this food, so a swap compares like with like. A serving of another food can be bigger or smaller.

Compared with the other vegetables we’ve checked.

A food is listed only if it gives clearly more: at least a fifth more than this food, and at least 10% of the daily amount more.

More of what it’s good for

For omega-3: ALA: no other vegetables we’ve checked give clearly more, in the same 85 g.

More nutrients per serving, counted together

The other vegetables we’ve checked with more nutrients per serving than this one, counting at most 100 kcal. One score ranks them all, so the same few often lead.

  • Turnip greens, cooked
    • More vitamin K1 (312 µg vs 18.4 µg)
    • More folate (100 µg vs 1.7 µg)
    • More vitamin C (23.3 mg vs 1.53 mg)
    • Less omega-3: ALA (54.4 mg vs 561 mg)
  • Kale, cooked
    • More vitamin K1 (355 µg vs 18.4 µg)
    • More vitamin C (15.1 mg vs 1.53 mg)
    • More folate (55.3 µg vs 1.7 µg)
    • Less omega-3: ALA (286 mg vs 561 mg)
    • Less vitamin B6 (0.05 mg vs 0.18 mg)
  • Brussels sprouts, cooked
    • More vitamin K1 (119 µg vs 18.4 µg)
    • More vitamin C (52.7 mg vs 1.53 mg)
    • More folate (51 µg vs 1.7 µg)
    • Less omega-3: ALA (147 mg vs 561 mg)

Where the calcium card measured that less calcium gets in than from milk, calcium counts for less; everything else is as listed.

Your goal

Your goal changes only this list, not what the food gives you or what to watch.

Losing weight: fewer calories, and more nutrients, protein and fibre for each calorie.

  • Asparagus, cooked
    • 19 kcal in 85 g (this food: 105)
    • More folate (127 µg vs 1.7 µg)
    • More vitamin K1 (43 µg vs 18.4 µg)
    • Less omega-3: ALA (24.7 mg vs 561 mg)
  • Turnip greens, cooked
    • 17 kcal in 85 g (this food: 105)
    • More vitamin K1 (312 µg vs 18.4 µg)
    • More folate (100 µg vs 1.7 µg)
    • More vitamin C (23.3 mg vs 1.53 mg)
    • Less omega-3: ALA (54.4 mg vs 561 mg)
  • Broccoli, cooked
    • 24 kcal in 85 g (this food: 105)
    • More vitamin K1 (74.9 µg vs 18.4 µg)
    • More vitamin C (34.1 mg vs 1.53 mg)
    • More folate (47.6 µg vs 1.7 µg)
    • Less omega-3: ALA (35.7 mg vs 561 mg)
Why some foods aren’t suggested

Left out: Spinach, cooked (Cadmium: go easy · lots of oxalate, more than its own calcium can bind).

Bring a tracker export or describe your usual week. The same rules check all of it.

The numbers

Open every value

Name in the database: Onions, yellow, sauteed

How the serving was set: 85 g (Health Canada V.1, vegetables without sauce; same row as the raw onion)

Listed nutrients, per 100 g

For each nutrient, the value this page uses is marked “used”. A row marked “second database” is another database’s figure for a matching food, kept so you can see how far databases disagree (they can differ in the samples analysed, lab methods and rounding). Its own cells are worked out from it, but none of the page’s words or scores are.

NutrientPer servingPer 100 caloriesHowSourceGrade
Omega-3: ALA0.66 g0.56 g0.54 glisted usedUS food database (USDA SR Legacy) #170004C
Calcium20 mg17 mg16.26 mglisted usedUS food database (USDA SR Legacy) #170004C
41 mg34.85 mg33.33 mgsecond database · not used · 2.1×UK food tables (CoFID 2021) #13-501C
20 mg17 mg16.26 mgcopy of USDA · not usedCanadian Nutrient File 2026 #5960C
Carbohydrate7.86 g6.68 g6.39 glisted usedUS food database (USDA SR Legacy) #170004C
Choline6.5 mg5.53 mg5.28 mglisted usedUS food database (USDA SR Legacy) #170004C
Energy123 kcal104.55 kcal–FDC Energy (kcal) usedUS food database (USDA SR Legacy)–
Omega-3: EPA + DHA0 g0 g0 glisted usedUS food database (USDA SR Legacy) #170004C
Fat10.8 g9.18 g8.78 glisted usedUS food database (USDA SR Legacy) #170004C
5.3 g4.51 g4.31 gsecond database · not used · 2×UK food tables (CoFID 2021) #13-501C
Fatty acids, total saturated1.477 g1.26 g1.2 glisted usedUS food database (USDA SR Legacy) #170004C
Fibre1.7 g1.45 g1.38 glisted usedUS food database (USDA SR Legacy) #170004C
3 g2.55 g2.44 gsecond database · not usedUK food tables (CoFID 2021) #13-501C
Folate2 µg1.7 µg1.63 µglisted usedUS food database (USDA SR Legacy) #170004C
7 µg5.95 µg5.69 µgsecond database · not used · 3.5×UK food tables (CoFID 2021) #13-501C
Iron0.27 mg0.23 mg0.22 mglisted usedUS food database (USDA SR Legacy) #170004C
0.42 mg0.36 mg0.34 mgsecond database · not usedUK food tables (CoFID 2021) #13-501C
Magnesium9 mg7.65 mg7.32 mglisted usedUS food database (USDA SR Legacy) #170004C
11 mg9.35 mg8.94 mgsecond database · not usedUK food tables (CoFID 2021) #13-501C
Niacin (B3, niacin equivalents)0.27 mg0.23 mg0.22 mglisted usedCanadian Nutrient File 2026 #5960C
Phosphorus33 mg28.05 mg26.83 mglisted usedUS food database (USDA SR Legacy) #170004C
31 mg26.35 mg25.2 mgsecond database · not usedUK food tables (CoFID 2021) #13-501C
Potassium133 mg113.05 mg108.13 mglisted usedUS food database (USDA SR Legacy) #170004C
189 mg160.65 mg153.66 mgsecond database · not usedUK food tables (CoFID 2021) #13-501C
Protein0.95 g0.81 g0.77 glisted usedUS food database (USDA SR Legacy) #170004C
1.2 g1.02 g0.98 gsecond database · not usedUK food tables (CoFID 2021) #13-501C
Riboflavin (B2)0.041 mg0.03 mg0.03 mglisted usedUS food database (USDA SR Legacy) #170004C
0.03 mg0.03 mg0.02 mgsecond database · not usedUK food tables (CoFID 2021) #13-501C
Sodium12 mg10.2 mg9.76 mglisted usedUS food database (USDA SR Legacy) #170004C
4 mg3.4 mg3.25 mgsecond database · not used · 3×UK food tables (CoFID 2021) #13-501C
Thiamin (B1)0.049 mg0.04 mg0.04 mglisted usedUS food database (USDA SR Legacy) #170004C
0.12 mg0.1 mg0.1 mgsecond database · not used · 2.4×UK food tables (CoFID 2021) #13-501C
Vitamin B60.207 mg0.18 mg0.17 mglisted usedUS food database (USDA SR Legacy) #170004C
0.1 mg0.09 mg0.08 mgsecond database · not used · 2.1×UK food tables (CoFID 2021) #13-501C
Vitamin C1.8 mg1.53 mg1.46 mglisted usedUS food database (USDA SR Legacy) #170004C
3 mg2.55 mg2.44 mgsecond database · not usedUK food tables (CoFID 2021) #13-501C
Vitamin D0 µg0 µg0 µglisted usedUS food database (USDA SR Legacy) #170004C
0 µg0 µg0 µgsecond database · not usedUK food tables (CoFID 2021) #13-501C
Vitamin E0.68 mg0.58 mg0.55 mglisted usedUS food database (USDA SR Legacy) #170004C
2.85 mg2.42 mg2.32 mgsecond database · not used · 4.2×UK food tables (CoFID 2021) #13-501C
Vitamin K121.6 µg18.36 µg17.56 µglisted usedUS food database (USDA SR Legacy) #170004C
Water80.01 g68.01 g65.05 glisted usedUS food database (USDA SR Legacy) #170004C
79.9 g67.92 g64.96 gsecond database · not usedUK food tables (CoFID 2021) #13-501C
Zinc0.21 mg0.18 mg0.17 mglisted usedUS food database (USDA SR Legacy) #170004C
0.2 mg0.17 mg0.16 mgsecond database · not usedUK food tables (CoFID 2021) #13-501C
NutrientPer 100 gPer servingPer 100 caloriesHowSourceGrade
Copper0.017 mg0.01 mg0.01 mglisted usedUS food database (USDA SR Legacy) #170004C
0.06 mg0.05 mg0.05 mgsecond database · not used · 3.5×UK food tables (CoFID 2021) #13-501C
Ash0.38 g0.32 g0.31 glisted usedUS food database (USDA SR Legacy) #170004C
Starch0 g0 g0 glisted usedUS food database (USDA SR Legacy) #170004C
Sucrose0.81 g0.69 g0.66 glisted usedUS food database (USDA SR Legacy) #170004C
Glucose2.1 g1.79 g1.71 glisted usedUS food database (USDA SR Legacy) #170004C
Fructose1.48 g1.26 g1.2 glisted usedUS food database (USDA SR Legacy) #170004C
Maltose0 g0 g0 glisted usedUS food database (USDA SR Legacy) #170004C
Energy516 kj438.6 kj419.51 kjlisted usedUS food database (USDA SR Legacy) #170004C
Vitamin D (D2 + D3), International Units0 iu0 iu0 iulisted usedUS food database (USDA SR Legacy) #170004C
Tocopherol, beta0.04 mg0.03 mg0.03 mglisted usedUS food database (USDA SR Legacy) #170004C
Tocopherol, gamma5.64 mg4.79 mg4.59 mglisted usedUS food database (USDA SR Legacy) #170004C
Tocopherol, delta1.57 mg1.33 mg1.28 mglisted usedUS food database (USDA SR Legacy) #170004C
Tocotrienol, alpha0.03 mg0.03 mg0.02 mglisted usedUS food database (USDA SR Legacy) #170004C
Tocotrienol, beta0 mg0 mg0 mglisted usedUS food database (USDA SR Legacy) #170004C
Tocotrienol, gamma0 mg0 mg0 mglisted usedUS food database (USDA SR Legacy) #170004C
Tocotrienol, delta0 mg0 mg0 mglisted usedUS food database (USDA SR Legacy) #170004C
Vitamin K (Dihydrophylloquinone)0 µg0 µg0 µglisted usedUS food database (USDA SR Legacy) #170004C
Folate, food2 µg1.7 µg1.63 µglisted usedUS food database (USDA SR Legacy) #170004C
Betaine0.1 mg0.09 mg0.08 mglisted usedUS food database (USDA SR Legacy) #170004C
Tryptophan0.014 g0.01 g0.01 glisted usedUS food database (USDA SR Legacy) #170004C
Threonine0.02 g0.02 g0.02 glisted usedUS food database (USDA SR Legacy) #170004C
Isoleucine0.014 g0.01 g0.01 glisted usedUS food database (USDA SR Legacy) #170004C
Leucine0.024 g0.02 g0.02 glisted usedUS food database (USDA SR Legacy) #170004C
Lysine0.038 g0.03 g0.03 glisted usedUS food database (USDA SR Legacy) #170004C
Methionine0.002 g0 g0 glisted usedUS food database (USDA SR Legacy) #170004C
Cystine0.004 g0 g0 glisted usedUS food database (USDA SR Legacy) #170004C
Phenylalanine0.024 g0.02 g0.02 glisted usedUS food database (USDA SR Legacy) #170004C
Tyrosine0.014 g0.01 g0.01 glisted usedUS food database (USDA SR Legacy) #170004C
Valine0.02 g0.02 g0.02 glisted usedUS food database (USDA SR Legacy) #170004C
Arginine0.102 g0.09 g0.08 glisted usedUS food database (USDA SR Legacy) #170004C
Histidine0.014 g0.01 g0.01 glisted usedUS food database (USDA SR Legacy) #170004C
Alanine0.02 g0.02 g0.02 glisted usedUS food database (USDA SR Legacy) #170004C
Aspartic acid0.089 g0.08 g0.07 glisted usedUS food database (USDA SR Legacy) #170004C
Glutamic acid0.251 g0.21 g0.2 glisted usedUS food database (USDA SR Legacy) #170004C
Glycine0.024 g0.02 g0.02 glisted usedUS food database (USDA SR Legacy) #170004C
Proline0.012 g0.01 g0.01 glisted usedUS food database (USDA SR Legacy) #170004C
Serine0.02 g0.02 g0.02 glisted usedUS food database (USDA SR Legacy) #170004C
Fatty acids, total trans0 g0 g0 glisted usedUS food database (USDA SR Legacy) #170004C
SFA 8:00 g0 g0 glisted usedUS food database (USDA SR Legacy) #170004C
SFA 10:00 g0 g0 glisted usedUS food database (USDA SR Legacy) #170004C
SFA 12:00 g0 g0 glisted usedUS food database (USDA SR Legacy) #170004C
SFA 14:00.002 g0 g0 glisted usedUS food database (USDA SR Legacy) #170004C
SFA 16:01.02 g0.87 g0.83 glisted usedUS food database (USDA SR Legacy) #170004C
SFA 18:00.395 g0.34 g0.32 glisted usedUS food database (USDA SR Legacy) #170004C
SFA 20:00.03 g0.03 g0.02 glisted usedUS food database (USDA SR Legacy) #170004C
MUFA 18:12.155 g1.83 g1.75 glisted usedUS food database (USDA SR Legacy) #170004C
PUFA 18:24.81 g4.09 g3.91 glisted usedUS food database (USDA SR Legacy) #170004C
PUFA 18:30.66 g0.56 g0.54 glisted usedUS food database (USDA SR Legacy) #170004C
PUFA 20:40 g0 g0 glisted usedUS food database (USDA SR Legacy) #170004C
PUFA 22:6 n-3 (DHA)0 g0 g0 glisted usedUS food database (USDA SR Legacy) #170004C
SFA 22:00.03 g0.03 g0.02 glisted usedUS food database (USDA SR Legacy) #170004C
MUFA 14:10 g0 g0 glisted usedUS food database (USDA SR Legacy) #170004C
MUFA 16:10 g0 g0 glisted usedUS food database (USDA SR Legacy) #170004C
PUFA 18:40 g0 g0 glisted usedUS food database (USDA SR Legacy) #170004C
MUFA 20:10.03 g0.03 g0.02 glisted usedUS food database (USDA SR Legacy) #170004C
PUFA 20:5 n-3 (EPA)0 g0 g0 glisted usedUS food database (USDA SR Legacy) #170004C
MUFA 22:10 g0 g0 glisted usedUS food database (USDA SR Legacy) #170004C
PUFA 22:5 n-3 (DPA)0 g0 g0 glisted usedUS food database (USDA SR Legacy) #170004C
Fatty acids, total monounsaturated2.185 g1.86 g1.78 glisted usedUS food database (USDA SR Legacy) #170004C
Fatty acids, total polyunsaturated5.47 g4.65 g4.45 glisted usedUS food database (USDA SR Legacy) #170004C
SFA 15:00 g0 g0 glisted usedUS food database (USDA SR Legacy) #170004C
SFA 17:00 g0 g0 glisted usedUS food database (USDA SR Legacy) #170004C
SFA 24:00 g0 g0 glisted usedUS food database (USDA SR Legacy) #170004C
PUFA 20:2 n-6 c,c0 g0 g0 glisted usedUS food database (USDA SR Legacy) #170004C
MUFA 17:10 g0 g0 glisted usedUS food database (USDA SR Legacy) #170004C
PUFA 20:30 g0 g0 glisted usedUS food database (USDA SR Legacy) #170004C
MUFA 15:10 g0 g0 glisted usedUS food database (USDA SR Legacy) #170004C
Lactose0 g0 g0 glisted usedUS food database (USDA SR Legacy) #170004C
0 g0 g0 gsecond database · not usedUK food tables (CoFID 2021) #13-501C
Manganese0.102 mg0.09 mg0.08 mglisted usedUS food database (USDA SR Legacy) #170004C
0.14 mg0.12 mg0.11 mgsecond database · not usedUK food tables (CoFID 2021) #13-501C
Niacin (B3, preformed)0.037 mg0.03 mg0.03 mglisted usedUS food database (USDA SR Legacy) #170004C
0.4 mg0.34 mg0.33 mgsecond database · not used · 10.8×UK food tables (CoFID 2021) #13-501C
Pantothenic acid (B5)0.172 mg0.15 mg0.14 mglisted usedUS food database (USDA SR Legacy) #170004C
0.04 mg0.03 mg0.03 mgsecond database · not used · 4.3×UK food tables (CoFID 2021) #13-501C

Change the amount to rescale the first column. Nutrients a database doesn't list are missing, not zero.

Hazard rows as the dataset rates them

  • Acrylamide · Nothing to watch: doesn’t double average intake · No safe threshold (EFSA benchmark dose lower limit (BMDL10) 0.17 mg/kg body weight/day; adult average 0.4-0.9 µg/kg body weight/day, 28-63 µg/day at 70 kg). At the mean, 36 µg/kg, an 85 g serving carries 3.1 µg, adding 4.9-10.9%; at the median, 14 µg/kg, 1.2 µg (+1.9-4.2%): far from doubling, so no cap. The single highest sample (420 µg/kg, 36 µg per 85 g) would add 57-127%; the rating uses the mean, and the maximum is shown so the spread is visible. · PubMed 32231929 · B

Oxalate, phytate and gut-tolerance measurements

  • histamine: no distinct difference between raw and fried onion (n = 3 each, ELISA); the numbers are in Fig. 3, which could not be opened; the review that cites it says histamine was 'well below 1 mg/kg' in every food before and after frying ppm (= mg/kg) · fresh weight, ground sample · fried at 150 C for 1-5 minutes in a preheated pan with 10 ml soy bean oil (the paper's words: 'fried') · grade B · PubMed 29200758

Sources

Body map 2026-10-25.1: each nutrient’s job comes from an agency fact sheet, linked beside it under Good for.

The plain words: “a lot” means one serving (100 g when the food has no serving size) gives at least 20% of the daily amount (the reference intake), “some” at least 10%, “a little” at least 2% (the cut-offs are ours, one set for every page: 20% and 10% are borrowed from the US labelling terms “high” and “good source” and applied to Health Canada’s daily amount, whereas Health Canada’s own shopper rule says 15%; provisional: they may change in a later method version). The daily amount is Health Canada’s Dietary Reference Intake for adults 19–30; where men and women need different amounts we use the higher one (protein: 56 g for men, 46 g for women). The percentage printed under each nutrient is the printed amount as a share of that daily amount, rounded to the nearest whole number, and the word is read from that percentage, so the amount, the percentage and the word always agree. Calcium with a measured absorption is scaled by how well it gets in compared with milk.

The scale: “Nothing to watch” means a serving a day stays under the limit at ordinary amounts; “Go easy” means a serving a day can push past the limit for adults who already take in the most, or fewer than 2 servings reach it; “Limit it” means once a week or less. The dataset’s own rating is under “How we got this”. Provisional: the scale may change in a later method version.

Measured absorption under Good for: grade-A studies in adults that tested this preparation of this food, as a share of the listed amount (the share digested, for protein), quoted once each source has passed our evidence check; animal studies and other variants stay in the table above. Provisional: this screen may change in a later method version.