Creamy dressing: the fat that helps your salad, and the salt that rides along

The best evidence on creamy dressing is about what it does for the vegetables under it. In a crossover trial of 7 adults eating single salad meals with a canola oil dressing, the fat-free version left carotenoid absorption close to zero, and 0.99 oz (28 g) of oil beat 6 g. Mayonnaise did the same job in two small meal tests. Broccoli with mayonnaise raised blood lutein and beta-carotene in 18 adults more than broccoli alone, and carrots with mayonnaise raised beta-carotene in 9 men more than carrots or carrot juice. Neither abstract gives the size of the rise. The price is sodium. A 15 g tablespoon of creamy Italian dressing, the nearest code in US survey data, works out at about 40 calories and 145 mg sodium from its per 3.5 oz (100 g) values. The fat-free version drops to about 8 calories a tablespoon and climbs to 164 mg sodium.

The numbers, per 3.5 oz (100 g)

How much is actually in it

• Under US rules, a product sold as salad dressing must contain at least 30% vegetable oil by weight plus egg yolk. — — Evidence E source
  Minimum 30% vegetable oil by weight; egg yolk solids equivalent to at least 4% liquid egg yolk

What a real portion looks like

• A tablespoon (15 g) of creamy Italian dressing carries about 145 mg sodium and 40 calories in US survey data, and light or fat-free versions cut calories far more than sodium, which is higher in the fat-free one. — US household measures, FNDDS (n = 3 food codes) Evidence E source
  Per 100 g: regular 268 calories, 966 mg sodium; light 111 calories, 882 mg; fat free 56 calories, 1094 mg; per tablespoon 15 g: 40.2 / 16.6 / 8.4 calories and 144.9 / 132.3 / 164.1 mg sodium

What your body absorbs

• In a crossover trial of 7 adults, salads with fat-free dressing yielded almost no absorbed carotenoids, and dressing with 28 g oil beat dressing with 6 g. — 7 adults, three single salad meals with 0, 6 or 28 g canola oil, washout of 2 weeks or more (n = 7) Evidence B source
  Carotenoids in chylomicrons negligible at 0 g; higher at 6 g than 0 g (P < 0.04); higher at 28 g than 6 g (P < 0.02)
• In 18 adults, broccoli eaten with mayonnaise raised blood lutein and beta-carotene more than broccoli alone, while plain oil showed no significant edge. — 18 healthy subjects, three test meals in random order, blood at 2, 4 and 6 h (n = 18) Evidence B source
  Incremental AUC of lutein/zeaxanthin and beta-carotene higher after mayonnaise than control; oil meal not different from either
• In 9 men, carrots eaten with mayonnaise raised blood beta-carotene more than carrots alone or carrot juice. — nine adult males, four carrot meals in random order, blood up to 8 h (n = 9) Evidence B source
  Incremental AUC of serum beta-carotene higher after carrot with mayonnaise than after carrot or carrot juice

What cooking and storage change

• No dataset we hold gives creamy dressing a UK composition figure, sample spread or storage losses, and the EU claim register does not name it. — Layers searched on 2026-10-01: CoFID, USDA variability, USDA retention R6, EU register, ODS, drug interactions, PubMed corpus pubmed:469385 (n = 0 records in 6 layers) Evidence E source
  No CoFID entry, no Foundation spread (3 SR Legacy records only), no retention factor, 0 EU claims for salad dressing, mayonnaise or ranch

What it does to your health

• Over 4 weeks, 20 g a day of soybean-oil mayonnaise lowered LDL cholesterol by 6.6 mg/dL (0.17 mmol/L) versus palm-olein mayonnaise. — healthy Malaysian adults, 20 g mayonnaise daily, two 4-week periods with 2-week washout Evidence B source
  TC -0.25 mmol/L (P = 0.001), LDL-C -6.6 mg/dL (-0.17 mmol/L) (P = 0.016), HDL-C -4.6 mg/dL (-0.12 mmol/L) (P < 0.001); LDL:HDL ratio unchanged

Safety, limits and interactions

• Observational outbreak data tie homemade raw-egg mayonnaise to Salmonella, with 10-fold higher odds of illness in one Sydney outbreak. — attendees of a catered barbeque, Sydney, 2009 (n = 87) Evidence C source
  Adjusted odds ratio 10.3 (95% CI 1.79-59.5) for the Russian salad with raw egg mayonnaise; 18% of cases hospitalized
• When a homemade recipe calls for eggs that stay raw or undercooked when served, FDA advises shell eggs treated to destroy Salmonella or pasteurized egg products, and names children, older adults, pregnant women and people with weakened immune systems as at greater risk of severe illness. — US consumers, with children, older adults, pregnant women and people with weakened immune systems named as at greater risk Evidence E source
  Use shell eggs treated to destroy Salmonella or pasteurized egg products in raw or undercooked egg recipes

What people believe that the data does not support

• US rules let salad dressings carry the plant sterol heart claim even when their fat content would normally disqualify a food from health claims. — — Evidence E source
  Exemption from the total fat disqualifying level for dressings for salad

Who this works differently for

• In 12 women eating salads with 0 to 32 g soybean oil in the dressing, absorption of carotenoids and fat-soluble vitamins was highest at 32 g, the top amount tested, though some women barely responded. — 12 women, five salad meals with 0, 2, 4, 8 or 32 g soybean oil (n = 12) Evidence B source
  Absorption highest with 32 g oil (P < 0.002); linear dose response for alpha-carotene, lycopene, phylloquinone, retinyl palmitate across 0-32 g; wide individual variation
• Among 69 women dieting for 6 months, the 50% fat salad dressing went from most liked to least liked, most of all in PROP non-tasters. — sixty-nine women with obesity on a low-fat or low-carbohydrate diet, 6 months (n = 69) Evidence B source
  50% fat sample most liked at baseline, least liked at 6 months (P = 0.04); strongest in non-tasters (P < 0.02); no effect of diet type

The bottom line

How much fat it takes varies from person to person. In 12 women eating salads dressed with 0, 2, 4, 8 or 1.1 oz (32 g) of soybean oil, absorption of carotenoids and fat-soluble vitamins was highest at 32 g, and some women showed a negligible response. The oil in the jar matters for cholesterol. In a double-blind crossover trial that compared two mayonnaises with each other, healthy Malaysian adults eating 20 g a day of the soybean oil one for 4 weeks had LDL cholesterol 6.6 mg/dL (0.17 mmol/L) lower than on the palm olein one. HDL fell too, by 4.6 mg/dL (0.12 mmol/L), so the LDL to HDL ratio did not change. A heart claim on a dressing bottle is about added plant sterols. US rules let dressings carry that claim even though their fat content would normally disqualify a food from health claims, and the dressing itself has no claim of its own. Only a product sold under the name salad dressing must, by US standard, hold at least 30 percent vegetable oil and egg yolk. Ranch and creamy Italian fall outside that standard. Tastes can shift. Among 69 women with obesity on a 6 month low-fat or low-carbohydrate diet, a 50 percent fat dressing went from the most liked sample to the least liked, most strongly in PROP non-tasters. That trial measured liking, and it did not measure how much dressing anyone ate. The caution our cards support is about raw egg. In one observational study of a 2009 barbecue outbreak in Sydney, homemade raw-egg mayonnaise in a Russian salad carried 10.3 times the odds of Salmonella illness (95% CI 1.79 to 59.5). That finding concerns homemade raw egg, and commercial pasteurized dressing was not studied. Of those who fell ill, 18 percent went to hospital. Anyone avoiding egg should know that a US product named salad dressing must contain egg yolk. FDA does not name creamy dressing as such, but for homemade recipes with eggs that stay raw or undercooked when served, with Caesar salad dressing as its example, it advises shell eggs treated to destroy Salmonella or pasteurized egg products. It names children, older adults, pregnant women and people with weakened immune systems as at greater risk of severe illness. We have no card yet on drug interactions, and that gap is not a sign of safety.

Sources

1. crmd-r3-10 · regulation
   Salad dressing contains not less than 30 percent by weight of vegetable oil and not less egg yolk-containing ingredient than is equivalent in egg yolk solids content to 4 percent by weight of liquid egg yolks.
   21 CFR 169.150, Salad dressing · checked 2026-10-01
2. crmd-r3-01 · reference dataset
   FNDDS 2710209 Creamy Italian dressing: Sodium 966 mg/100 g, 1 tablespoon 15 g 144.9 mg · Energy 268 kcal/100 g, 1 tablespoon 40.2 kcal · FNDDS 2710217 light: Sodium 882 mg/100 g, Energy 111 kcal/100 g · FNDDS 2710231 fat free: Sodium 1094 mg/100 g, Energy 56 kcal/100 g
   USDA FNDDS 2021-2023 · checked 2026-10-01
3. crmd-r3-02 · randomized crossover trial
   The subjects (n = 7) each consumed 3 salads consisting of equivalent amounts of spinach, romaine lettuce, cherry tomatoes, and carrots with salad dressings containing 0, 6, or 28 g canola oil. ... Essentially no absorption of carotenoids was observed when salads with fat-free salad dressing were consumed. A substantially greater absorption of carotenoids was observed when salads were consumed with full-fat than with reduced-fat salad dressing.
   Am J Clin Nutr, 2004 · checked 2026-10-01
4. crmd-r3-04 · randomized controlled trial
   Eighteen healthy subjects participated in the test, which consisted of broccoli as a control (CON) meal, broccoli with oil (OIL), and broccoli with mayonnaise (MS), consumed in random order. ... The incremental areas under the curves (IAUCs) of serum lutein/zeaxanthin and beta-carotene concentrations were higher after the MS meal than after the CON meal. IAUCs after the OIL meal exhibited no statistically significant differences from the CON and MS meals.
   J Nutr Sci Vitaminol (Tokyo), 2009 · checked 2026-10-01
5. crmd-r3-05 · randomized controlled trial
   Following collection of fasting blood samples, nine adult males consumed one of the four diets in random order. ... The incremental areas under the curves of serum β-carotene concentration were higher following MS than following both CON and JU.
   J Nutr Sci Vitaminol (Tokyo), 2011 · checked 2026-10-01
6. crmd-r3-11 · search record
   creamy dressing / salad dressing / mayonnaise / ranch dressing: CoFID 0 · variability 0 · retention R6 0 (unknown to FDC) · EU register 0 · interactions 0
   Bioma research layers, snapshot 2026-10-01 · checked 2026-10-01
7. crmd-r3-06 · randomized crossover trial
   Subjects underwent a randomized double-blind crossover trial, consuming diets supplemented with 20 g/day of either soybean oil-based mayonnaise (SB-mayo) or palm olein-based mayonnaise (PO-mayo) for 4 weeks each with a 2-week wash-out period. ... RESULTS: Treatments resulted in significant reductions in TC (diff = -0.25 mmol/L; P = 0.001), LDL-C (diff = -0.17 mmol/L; P = 0.016) and HDL-C (diff = -0.12 mmol/L; P < 0.001) in SB-mayo compared to PO-mayo without affecting LDL-C:HDL-C ratio (P > 0.05).
   Lipids Health Dis, 2016 · checked 2026-10-01
8. crmd-r3-08 · retrospective cohort
   Seventy one of the 87 attendees identified met the case definition. ... Microbiological evidence confirmed that a number of food items were contaminated with Salmonella Typhimurium 108/170, with the raw egg mayonnaise used in a Russian salad being the most likely primary food vehicle (adjusted odds ratio=10.3 [95% confidence interval 1.79-59.5]).
   Foodborne Pathog Dis, 2011 · checked 2026-10-01
9. sf-eggsafe-r6-creamydr-1 · agency advice
   For recipes that call for eggs that are raw or undercooked when the dish is served — like Caesar salad dressing and homemade ice cream — use either shell eggs that have been treated to destroy Salmonella, by pasteurization or another approved method, or pasteurized egg products...Certain people are at greater risk for severe illness and include children, older adults, pregnant women, and people with weakened immune systems (such as transplant patients and individuals with HIV/AIDS, cancer, and diabetes).
   US Food and Drug Administration, What You Need to Know About Egg Safety · checked 2026-10-08
10. crmd-r3-09 · regulation
    All requirements set forth in § 101.14 shall be met, except § 101.14(a)(4) with respect to the disqualifying level for total fat per 50 grams (g) in dressings for salad and spreads and § 101.14(e)(6) with respect to dressings for salad.
    21 CFR 101.83, Health claims: plant sterol/stanol esters and risk of coronary heart disease · checked 2026-10-01
11. crmd-r3-03 · randomized controlled trial
    Women (n = 12) each consumed 5 vegetable salads with salad dressings containing 0, 2, 4, 8, or 32 g soybean oil. ... Absorption of all carotenoids and fat-soluble vitamins was highest with 32 g oil (P < 0.002). ... However, the effect varied widely, and some individuals showed a negligible response.
    Am J Clin Nutr, 2017 · checked 2026-10-01
12. crmd-r3-07 · randomized controlled trial
    Sixty-nine women (BMI = 34.4 kg/m(2) ; age = 44.2 years) followed the low-fat diet (n = 31) or low-carbohydrate diet (n = 38). ... Also, the 50% fat sample was most liked at baseline and least liked by 6 months (P = 0.04), and this effect was most pronounced in the nontasters (P < 0.02).
    Obesity (Silver Spring), 2016 · checked 2026-10-01