Caesar dressing: the fat helps, the raw egg is the question

Nobody has put a Caesar dressing in a trial. The anchovy, the parmesan, the garlic and the raw yolk have never been tested together as a dressing, so everything on this page comes from plainer dressings, mostly canola or soybean oil on a salad, and one trial that used scrambled eggs. Read it with that in mind. What those trials agree on is that the fat is the point. In 7 adults a salad with fat-free dressing put almost no carotenoids into the blood, and 28 g of oil put in the most. In 12 women absorption climbed in a straight line from 0 to 32 g of oil, and in 29 adults 20 g beat 3 g and 8 g whether the fat was canola oil, soybean oil or butter. The amount mattered more than the kind. Three scrambled eggs on a salad raised carotenoid absorption about 8-fold in 16 young men. The raw egg in a traditional Caesar is the other side of the story. A pooled analysis of 35 case-control studies put raw eggs among the strongest risk factors for salmonella, and a later German study found raw egg no longer counted at all, which its authors credit to control programmes in the poultry industry. Which of those two findings applies to you depends on the eggs in front of you, and the FDA answer for Caesar dressing specifically is pasteurised eggs.

How much is actually in it

• In 29 adults, 20 g of fat with a salad gave higher carotenoid absorption than 3 or 8 g regardless of whether the fat was canola oil, soybean oil or butter, and the amount mattered more than the type. — 29 healthy adults, 3 x 3 Latin square, three salads with 3, 8 or 20 g lipid (n = 29) Evidence B source
  20 g lipid higher than 3 and 8 g for all carotenoids (p < 0.05) except alpha-carotene (p = 0.07); lipid source had less impact than amount

What a real portion looks like

• In 12 women, carotenoid and vitamin K absorption from a salad rose linearly with 0 to 32 g of soybean oil in the dressing and was highest at 32 g, though some individuals showed almost no response. — 12 women, crossover, 5 salads with 0, 2, 4, 8 or 32 g soybean oil (n = 12) Evidence B source
  Linear dose response for alpha-carotene, lycopene, phylloquinone, retinyl palmitate across 0-32 g; all highest at 32 g (P < 0.002); wide interindividual variation

What your body absorbs

• In 16 young men, eating 3 scrambled eggs with a raw vegetable salad raised total carotenoid absorption about 8-fold versus the salad alone (125.7 vs 14.9 nmol/L per 10 h). — 16 healthy young men, crossover, salad with 0, 1.5 or 3 eggs (n = 16) Evidence B source
  TRL carotenoid AUC 125.7 ± 19.4 (3 eggs) vs 44.8 ± 9.2 (1.5 eggs) vs 14.9 ± 5.2 nmol/L per 10 h (control), P < 0.0001; lutein and zeaxanthin 4-5-fold

Safety, limits and interactions

• A meta-analysis of 35 case-control studies found eating raw eggs among the most important risk factors for sporadic salmonellosis, alongside travel and eating in restaurants. — sporadic salmonellosis cases and controls in 35 case-control studies (n = 35 studies) Evidence C source
  Raw eggs, travel, predisposing factors and restaurant eating were the strongest pooled risk factors; pooled ORs not given in abstract
• The warfarin label states that the amount of vitamin K in food may affect therapy and advises a consistent vitamin K intake, while regular Caesar dressing carries about 105 micrograms of vitamin K per 100 g in USDA SR Legacy. — people taking warfarin Evidence E source
  Dietary vitamin K antagonises warfarin; advice is consistency, not avoidance

What people believe that the data does not support

• In 7 adults, a salad eaten with fat-free dressing (0 g oil) gave negligible carotenoid absorption, while 28 g of canola oil in the dressing gave the highest absorption of alpha-carotene, beta-carotene and lycopene. — 7 healthy adults, crossover, 3 salads with 0, 6 or 28 g canola oil (n = 7) Evidence B source
  Fat-free: negligible chylomicron carotenoids; reduced-fat higher than fat-free (P < 0.04); full-fat higher than reduced-fat (P < 0.02)

Who this works differently for

• Among 152 preschoolers, bitter-sensitive children ate 80% more raw broccoli when it came with salad dressing as a dip than when served plain, over 7 weeks. — 152 predominantly Hispanic Head Start preschoolers, classroom-randomised, 7 weeks (n = 152) Evidence B source
  +80% broccoli intake with dressing among bitter-sensitive children (P < 0.001); no effect in bitter-insensitive children; liking not changed by dip
• FDA advises that recipes served with raw or undercooked eggs, naming Caesar salad dressing, be made with eggs treated to destroy Salmonella or with pasteurized egg products, with children, older adults, pregnant women and the immunocompromised at greater risk. — US consumers, FDA egg safety guidance Evidence E source
  Use pasteurized shell eggs or egg products for Caesar dressing; higher-risk groups named

What is still unknown

• In 285 matched case-control pairs in Lower Saxony (2011-2013), raw egg consumption was no longer a risk factor for salmonellosis, which the authors attribute to poultry control programmes. — 285 notified salmonellosis cases with 4 matched controls each, Germany 2011-2013 (n = 285) Evidence C source
  Raw egg not a risk factor; raw ground pork OR 6.0 (95% CI 1.8-20.1); antacids OR 5.8

The bottom line

If you eat salad for what is in the tomatoes and carrots, put the full-fat dressing on it. That is the one instruction here with four trials behind it, and it cuts against the fat-free bottle. The doses that worked were 20 to 32 g of oil on one salad. One of those trials also found people who absorbed almost nothing at any dose, and nobody has explained why. All four trials measured carotenoids and fat-soluble vitamins in the blood over the hours after a single meal. None of them measured health. A cooked egg on top helps as well. Three scrambled eggs raised absorption about 8-fold, though no one has tested whether the raw yolk whisked into a Caesar does the same. For a child who pushes away bitter vegetables, dressing as a dip is worth a try. Among 152 preschoolers the bitter-sensitive ones ate 80 percent more raw broccoli with a dip, and the other children ate no more than before. That trial used a ranch-type dressing, and the children did not come to like broccoli any better, they simply ate it. Two groups should read the label before the recipe. If you take warfarin, regular Caesar dressing carries about 105 micrograms of vitamin K per 100 g in USDA SR Legacy, and the drug label asks for a steady vitamin K intake rather than avoidance. So what matters is how often you eat it, and that this does not change from week to week. The fat-free version carries none in the same USDA table. If you are pregnant, older, have a weakened immune system or are feeding a young child, the FDA names Caesar dressing as a recipe to make with pasteurised eggs, because those groups face more severe illness from salmonella. For a bottle or a restaurant bowl that is a question to ask, and nothing on this page can answer it for you. What this page cannot tell you is what the dressing does beyond one salad. No trial has measured weight, blood pressure or anything else in people who eat Caesar dressing regularly, so what it would do to you over months would be a guess, and we do not print guesses. None of the absorption trials used olive oil, or the anchovy, garlic and parmesan that make a Caesar a Caesar. How large the salmonella risk from a raw egg is today, where you live, is also missing. The 35-study pooling did not report a size in its abstract, and the German result covers one region in two years.

Sources

1. cae-c2-03 · RCT
   Healthy subjects (n = 29) were randomized using a Latin square design (3 × 3) and consumed three identical salads with 3, 8, or 20 g of canola oil, soybean oil, or butter...Considering all lipid sources, 20 g of lipid promoted higher absorption compared to 3 and 8 g for all carotenoid species (p < 0.05), except for α-carotene (p = 0.07). The source of lipid had less impact on the absorption of carotenoids than amount of lipid.
   Mol Nutr Food Res, 2012 · checked 2026-09-23
2. cae-c2-02 · RCT
   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 2026-09-23
3. cae-c2-04 · RCT
   The total mean (±SE) carotenoid AUC0-10h in TRL was higher for the HE meal than for LE and control meals [125.7 ± 19.4(a) compared with 44.8 ± 9.2(b) compared with 14.9 ± 5.2(b) nmol/L · 10 h, respectively (values without a common superscript letter differ); P < 0.0001].
   Am J Clin Nutr, 2015 · checked 2026-09-23
4. cae-c2-06 · meta-analysis of observational studies
   Thirty-five Salmonella case-control studies were identified...Results suggested that travel, predisposing factors, eating raw eggs, and eating in restaurants were the most important risk factors for salmonellosis.
   Epidemiol Infect, 2012 · checked 2026-09-23
5. cae-c2-09 · drug label
   The amount of vitamin K in food may affect therapy with warfarin sodium. Advise patients taking warfarin sodium to eat a normal, balanced diet maintaining a consistent amount of vitamin K.
   DailyMed, warfarin sodium prescribing information, effective 2026-06-25 · checked 2026-09-23
6. cae-c2-01 · RCT
   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...After ingestion of the salads with fat-free salad dressing, the appearance of alpha-carotene, beta-carotene, and lycopene in chylomicrons was negligible.
   Am J Clin Nutr, 2004 · checked 2026-09-23
7. cae-c2-05 · RCT
   Bitter-sensitive children, however, ate 80% more broccoli with dressing than when served plain (P<0.001); effects did vary based on whether regular or light dressing was provided as a dip or sauce. Dip did not promote broccoli intake among bitter-insensitive children.
   J Acad Nutr Diet, 2012 · checked 2026-09-23
8. cae-c2-08 · agency page
   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
   FDA, What You Need to Know About Egg Safety · checked 2026-09-23
9. cae-c2-07 · case-control
   Conditional logistic regression analysis of 285 matched pairs revealed significant associations for raw ground pork consumption [odds ratio (OR) 6·0, 95% confidence interval (CI) 1·8-20·1], taking antacids (OR 5·8, 95% CI 1·4-24·5), eating meat outside the home (OR 5·7, 95% CI 2·2-14·6) and daily changing or cleaning of dishcloth (OR 2·1, 95% CI 1·2-3·9)...Raw egg consumption was not a risk factor, substantiating the success of recently implemented national control programmes in the poultry industry.
   Epidemiol Infect, 2015 · checked 2026-09-23