barbecue food safety grilling enthusiasts mayonnaise

What Happens If You Eat Mayonnaise That Has Been Left Out?

Written By Avi Green
What Happens If You Eat Mayonnaise That Has Been Left Out?

For all the barbecue enthusiasts out there, the thrill of grilling is often accompanied by a plethora of delicious additions, and mayonnaise is likely to be one of them. But have you ever wondered what happens if you eat mayonnaise that has been left out? In this article, we will delve into the effects of consuming mayonnaise that has sat outside the safe temperature range for too long, uncovering myths and providing you with valuable safety tips.

Mayonnaise is a common condiment at barbecues, often used in salads, dressings, and as an accompaniment to grilled meats. However, improperly stored mayonnaise can lead to foodborne illnesses. This particularly concerns those who enjoy outdoor picnics or potlucks on hot summer days. How can you ensure youre enjoying your food safely?

The Science Behind Mayonnaise

Before we jump into the consequences of consuming neglected mayonnaise, its essential to understand what mayonnaise is and how it behaves. Mayonnaise is typically made from oil, egg yolks, and vinegar or lemon juice. This combination creates an emulsion that is stable when refrigerated but can become a breeding ground for bacteria if left out at room temperature. To learn more about the ingredients, you can check out the difference between mayonnaise and salad dressing.

what happens if you eat mayonnaise that has been left out

What Happens When Mayonnaise Is Left Out?

When mayonnaise is left out at temperatures above 40F (4C), especially for more than two hours, you're inviting trouble. Here's a breakdown of what can happen:

Bacterial Growth

Mayonnaise is rich in proteins that can attract bacteria when left out. Common culprits include Salmonella, E. coli, and Staphylococcus aureus. When consumed, these bacteria can lead to food poisoning, causing symptoms like nausea, vomiting, diarrhea, and abdominal cramps.

Signs of Spoilage

How can you tell if your mayonnaise is bad? Signs include:

  • Change in color or texture: If your mayonnaise has separated or appears discolored, it's best to toss it.
  • Off smell: A sour or rancid odor is often a sign of spoilage.
  • Unusual taste: If it tastes off, its time to discard it.
what happens if you eat mayonnaise that has been left out

Preventing Spoilage at Barbecues

As a barbecue enthusiast, preventing spoilage is vital to keep the party going safely. Consider these tips:

  • Keep cool: Utilize coolers with ice packs to keep mayonnaise and other perishables chilled.
  • Monitor time: The two-hour rule is crucial. If its warm outside, try to limit the exposure to one hour.
  • Ask questions: When bringing food to a potluck, ensure everyone understands how to store mayonnaise correctly.

What to Do If Youve Left Mayonnaise Out

So what if you find that your mayonnaise has been out longer than recommended? Heres what to do:

  • 1. Assess the Situation: Check for any signs of spoilage as mentioned above.
  • 2. Trust Your Instincts: If in doubt, throw it out. Its better to be safe than sorry.
  • 3. Consult Professional Opinions: For further information on food safety, consider visiting trustworthy sites like PopSci.

Alternatives to Mayonnaise

If youre concerned about the safety of mayonnaise or looking for alternatives, here are some popular substitutes:

  • Greek Yogurt: A healthier alternative, rich in protein.
  • Avocado: Creamy and rich, perfect for salad dressings.
  • Hummus: Offers a unique flavor profile that pairs well with many dishes.
  • For more on mayonnaise substitutes, check out this helpful guide.

How to Handle Leftover Mayonnaise

If you've managed to keep your mayonnaise safe and have leftovers post-barbecue, here's how to store them:

  • Refrigerate Immediately: Place it back in the fridge as soon as possible.
  • Seal Tightly: Ensure the jar or container is sealed tightly to maintain freshness.
  • Check Expiry Dates: Always adhere to 'best by' dates.

Frequently Asked Questions

1. Can you reheat mayonnaise?

Mayonnaise should not be reheated, as it can break down and lead to spoilage.

2. How long can mayonnaise be left out?

Mayonnaise should not be left out for more than two hours at room temperature.

3. What happens if you eat spoiled mayonnaise?

Consuming spoiled mayonnaise can result in food poisoning due to bacterial growth, with symptoms like nausea and diarrhea.

As an Amazon Associate, I earn from qualifying purchases.


"8FT High Pressure Propane Hose with Adjustable Regulator - Ideal for Outdoor Grill Gas Fitting, Grill, Burner, Fryer, and Cooker - 0-20 PSI - 3/8" Flare X 1/8" NPT Male"
$41.94
(180 Cu. In. (2 Pack)
$35.43
(2 Pack) Ocean'S Halo, Organic Soy-Free Spicy Korean BBQ Sauce, 12 Ounce
$48.00
(Hot&Spicy) CJ Korean BBQ Original Sauce Chicken & Pork Marinade 29.6 Ounce (1)
$27.98
(Set of 3) Heavy Duty Vegetable Grill Baskets for Outdoor Grill, Stainless Steel Veggie Grilling Basket for All Grills, BBQ Gifts for Men, 1 Large & 2 Small
$48.10
, 24025BMT, Cast 2-Burner, Liquid Propane Gas Grill, Black
$338.00
, 60936, Grill Light Cob Handle Mount,Black
$40.22
, Deli Slices, Hickory Smoked, 5.5 Oz
$10.28
, Inc. 1423 Broiler Brush, Black
$77.66
, One Sheet Pan Chicken Parmesan Seasoning Mix, 1.5 Oz
$5.65
, Santa Maria Style Seasoning, 7 Oz.
$22.28
- 4 Piece Black Drillbrush Ultra Stiff Cleaning Brush Set - Metal Brush for Drill Alternative - Grill Brush for Cordless Drill - Grill Grate Cleaner Brush
$75.98
- BBQ Grill Cleaner Oil | 100% Plant-Based & Vegan | Best for Cleaning Barbeque Grills & Grates | Use with Wooden Scrapers, Brushes, Accessories & Tools | Great Gift for Dad! (8Oz)
$34.24
- Black Nitrile Gloves, Hypoallergenic Co-Polymer 6 Mill Thickness, Disposable Gloves, Powder Free, Non Sterile, Ambidextrous, Finger Tip Textured, Dispenser Pack of 100, Size. Medium.
$38.20
- Carolina Barbeque Sauce, Gourmet Carolina Sauce, Tangy BBQ Sauce with Tomato Vinegar, Premium Ingredients, Made with Gluten-Free Ingredients (20 Oz)
$24.76
- Double Pre-Seasoned, Square Carbon Steel BBQ Grill Griddle, Made in USA - Perfect for Gas Grill - Durable, Flat Top Grill Pan - 1/4" Thick, 14" X 18"
$215.98
- Double Pre-Seasoned, Square Carbon Steel BBQ Grill Griddle, Made in USA - Perfect for Gas Grill - Durable, Flat Top Grill Pan - 3/16" Thick, 14" X 18"
$245.57
- Greek Freak Mediterranean Spice Blend - All-Purpose Rubs, Spices and Seasonings - Use On: Chicken, Chickpeas, Beef, Seafood, Pork, Vegetables, Turkey, Potatoes and Salad Dressing - 4 Oz
$34.24
- Grill Brush and Scraper, 16.7”, Stainless Steel, Grill Cleaner, Grill Brush, Grill Cleaning Brush, BBQ Brill Brush, BBQ Brush for Grill Cleaning, Grill Brush for Outdoor Grill, Safe Grill Brush
$16.14
- Large under Grill Mat - Black Diamond Plate, 36 X 48 Inches, for Outdoor Use
$108.08
- Magnetic Barbecue BBQ Light Set for Grilling - 6 Alkaline AAA Batteries Included - Works on All Grills with an Exception to Stainless Steel.
$56.02
- Master Grill Pan, Korean Traditional BBQ Grill Pan - Stovetop Nonstick Indoor/Outdoor Smokeless BBQ Cast Aluminum Grill Pan
$105.58
- Meat Claws Bbq Grill Accessories Set - 2 Silicone Gloves, Claws for Pulled Pork, BBQ Thermometer - Perfect Smoker Accessories Grilling Tools Gift Set for (Orange Glove-Thermometer-Claw)
$40.18
- Monterey Seafood Seasoning and Hog Wild Cajun Seasoning, Gluten-Free Bbq Rubs and Spices for Smoking
$55.17
- Onyx Collection, 12-Inch Grill Pan, Coated with New Teflon Platinum Non-Stick Coating (PFOA Free) (12-Inch)
$87.98
- Professional Grade Chef Apron for Kitchen, BBQ & Grill
$67.98
- Stovetop Indoor Korean BBQ Nonstick Grill Pan With, Pfoa-Free, Dishwasher Oven Safe, Made in Korea
$77.98
-Outdoor Gas Pizza Oven, Rotating Propane Pizza Grill Oven for Exterior Backyard Pizza Maker with 14" Pizza Stone, Portable Pizza Ovens for outside with Pizza Peel,Pia,Cutter,Gloves and Thermometer.
$500.58
. the Safer Grill Cleaning Brush. All Natural. No Metal Bristles.
$59.98
07047 Cool Touch Electric Griddle
$73.98
07061 22-Inch Electric Griddle with Removable Handles, Black, 22-Inch
$119.98
1 Pair/2 Pieces BBQ Gloves, Grilling Gloves, Heat Resistant Barbecue Oven Gloves, 1472°F/800°C Kitchen Fireproof Mitts Heat Proof for Grilling, Baking, Cooking, Welding Gloves Mitts - Red
$16.42
1 Piece Random Nonstick Enameled Cast Iron Pan/Pot (4 Styles: 10.25" Skillet/2Qt Saucepan/2.8Qt/4.8Qt Dutch Oven) – Healthy round Pot for Sourdough Bread Baking on All Stovetops, Mystery Cookware Box
$69.99
1-Piece 16.50 Inch Cast Iron Griddle Plate | Reversible Pre-Seasoned Cast Iron Grill Pan for Gas Stovetop | Double Sided Used on Open Fire & in Oven | Pre-Coated with Oil
$58.44
1/2" X 1/8" Lavalock High Temp BBQ Gasket Smoker Seal for Nomex Door Lid, Self Stick Grey
$46.82
1/3Pc Non-Stick BBQ Grill Mat 40*33Cm Baking Mat Cooking Grilling Sheet Heat Resistance Easily Cleaned Kitchen for Party
$1.31
10 Inch Griddle Spatula Holder Magnetic Design, Stainless Steel Grill Barbecue Tool Rack, Griddle Accessories for Blackstone Flat Top Griddle and Other Grill Griddles (2 Pcs)
$42.57
10 Inch Square Cast Iron Grill Pan Skillet Grill Pan with Easy Grease Draining for Grilling Bacon, Steak, and Meats, Stove, Fire and Oven Safe for Camping or Barbecue (Red)
$63.98
10" Portable round Barbecue BBQ Charcoal Grill with Handle for Outdoor Home Kitchen BBQ Picnic Camping
$53.77
10" Square Cast Iron Grill Pan Steak Pan Pre Seasoned Grill Pan with Easy Grease Drain Spout, with Large Loop Handles for Grilling Bacon, Steak, and Meats
$67.98
10-42 BBQ Brisket Rub - All-Natural Spice Seasoning for Steak, Rib, Beef Brisket - Barbecue Meat Seasoning Dry Rub - BBQ Rubs and Spices for Smoking and Grilling - No MSG, 0 Calorie - 10.5Oz Bottle
$35.98
10-42 BBQ Brisket Rub | All-Natural Spice Seasoning for Steak, Rib, Beef Brisket | Barbecue Meat Seasoning Dry Rub | BBQ Rubs and Spices for Smoking and Grilling | No MSG, 5.5.Oz Bottle
$31.37
10-Inch Skewer for BBQ Kebab, Unbleached Long Bamboo/Wood Roasting Sticks for Grill -Heavy Duty Thickness -Flat Stick Flag Handle -With Dust-Free Packaging (100-Pack)
$22.97
10-LED Grill Light, as Labeled
$40.18
100 Pcs Grilling Gloves Kit Disposable BBQ Gloves with 2 Pairs Cotton Liners Grilling Gloves Cooking Gloves Latex Free Nitrile Gloves for Outdoor Grilling Barbecue Cooking
$18.40
100% All-Natural Hardwood Pellets - Maple Wood (20 Lb. Bag) Perfect for Pellet Smokers, Smoky Wood-Fired Flavor
$53.96
100% Compostable Food Prep Gloves, Restaurant-Quality,For Food Handling, Powder-Free, 100 Count, Medium, Earth Friendly Highest ASTM D6400, US BPI and Europe OK Compost Certified, San Francisco
$20.30
100% Cotton Kitchen Apron with an Adjustable Neck with Long Ties for Women Men Chef
$40.14
12 Inch round Pizza Stone, Heavy Duty Cordierite Pizza Grilling Stone, Bread Baking Stone for RV Oven, Grill and Toaster Oven, Ideal for Baking Crisp Crust Pizza, Bread, Cookies and More
$73.03
12 Inch Lightweight Pre-Seasoned Cast Iron Griddle with Cleaning Kit - Smooth Polished Surface, Easy to Clean Cast Iron Skillets Use in the Oven, on the Stove or Grill, over a Campfire
$59.98
"8FT High Pressure Propane Hose with Adjustable Regulator - Ideal for Outdoor Grill Gas Fitting, Grill, Burner, Fryer, and Cooker - 0-20 PSI - 3/8" Flare X 1/8" NPT Male"
$41.94
(180 Cu. In. (2 Pack)
$35.43
(2 Pack) Ocean'S Halo, Organic Soy-Free Spicy Korean BBQ Sauce, 12 Ounce
$48.00
(Hot&Spicy) CJ Korean BBQ Original Sauce Chicken & Pork Marinade 29.6 Ounce (1)
$27.98
(Set of 3) Heavy Duty Vegetable Grill Baskets for Outdoor Grill, Stainless Steel Veggie Grilling Basket for All Grills, BBQ Gifts for Men, 1 Large & 2 Small
$48.10
, 24025BMT, Cast 2-Burner, Liquid Propane Gas Grill, Black
$338.00
, 60936, Grill Light Cob Handle Mount,Black
$40.22
, Deli Slices, Hickory Smoked, 5.5 Oz
$10.28
, Inc. 1423 Broiler Brush, Black
$77.66
, One Sheet Pan Chicken Parmesan Seasoning Mix, 1.5 Oz
$5.65
, Santa Maria Style Seasoning, 7 Oz.
$22.28
- 4 Piece Black Drillbrush Ultra Stiff Cleaning Brush Set - Metal Brush for Drill Alternative - Grill Brush for Cordless Drill - Grill Grate Cleaner Brush
$75.98
- BBQ Grill Cleaner Oil | 100% Plant-Based & Vegan | Best for Cleaning Barbeque Grills & Grates | Use with Wooden Scrapers, Brushes, Accessories & Tools | Great Gift for Dad! (8Oz)
$34.24
- Black Nitrile Gloves, Hypoallergenic Co-Polymer 6 Mill Thickness, Disposable Gloves, Powder Free, Non Sterile, Ambidextrous, Finger Tip Textured, Dispenser Pack of 100, Size. Medium.
$38.20
- Carolina Barbeque Sauce, Gourmet Carolina Sauce, Tangy BBQ Sauce with Tomato Vinegar, Premium Ingredients, Made with Gluten-Free Ingredients (20 Oz)
$24.76
- Double Pre-Seasoned, Square Carbon Steel BBQ Grill Griddle, Made in USA - Perfect for Gas Grill - Durable, Flat Top Grill Pan - 1/4" Thick, 14" X 18"
$215.98
- Double Pre-Seasoned, Square Carbon Steel BBQ Grill Griddle, Made in USA - Perfect for Gas Grill - Durable, Flat Top Grill Pan - 3/16" Thick, 14" X 18"
$245.57
- Greek Freak Mediterranean Spice Blend - All-Purpose Rubs, Spices and Seasonings - Use On: Chicken, Chickpeas, Beef, Seafood, Pork, Vegetables, Turkey, Potatoes and Salad Dressing - 4 Oz
$34.24
- Grill Brush and Scraper, 16.7”, Stainless Steel, Grill Cleaner, Grill Brush, Grill Cleaning Brush, BBQ Brill Brush, BBQ Brush for Grill Cleaning, Grill Brush for Outdoor Grill, Safe Grill Brush
$16.14
- Large under Grill Mat - Black Diamond Plate, 36 X 48 Inches, for Outdoor Use
$108.08
- Magnetic Barbecue BBQ Light Set for Grilling - 6 Alkaline AAA Batteries Included - Works on All Grills with an Exception to Stainless Steel.
$56.02
- Master Grill Pan, Korean Traditional BBQ Grill Pan - Stovetop Nonstick Indoor/Outdoor Smokeless BBQ Cast Aluminum Grill Pan
$105.58
- Meat Claws Bbq Grill Accessories Set - 2 Silicone Gloves, Claws for Pulled Pork, BBQ Thermometer - Perfect Smoker Accessories Grilling Tools Gift Set for (Orange Glove-Thermometer-Claw)
$40.18
- Monterey Seafood Seasoning and Hog Wild Cajun Seasoning, Gluten-Free Bbq Rubs and Spices for Smoking
$55.17
- Onyx Collection, 12-Inch Grill Pan, Coated with New Teflon Platinum Non-Stick Coating (PFOA Free) (12-Inch)
$87.98
- Professional Grade Chef Apron for Kitchen, BBQ & Grill
$67.98
- Stovetop Indoor Korean BBQ Nonstick Grill Pan With, Pfoa-Free, Dishwasher Oven Safe, Made in Korea
$77.98
-Outdoor Gas Pizza Oven, Rotating Propane Pizza Grill Oven for Exterior Backyard Pizza Maker with 14" Pizza Stone, Portable Pizza Ovens for outside with Pizza Peel,Pia,Cutter,Gloves and Thermometer.
$500.58
. the Safer Grill Cleaning Brush. All Natural. No Metal Bristles.
$59.98
07047 Cool Touch Electric Griddle
$73.98
07061 22-Inch Electric Griddle with Removable Handles, Black, 22-Inch
$119.98
1 Pair/2 Pieces BBQ Gloves, Grilling Gloves, Heat Resistant Barbecue Oven Gloves, 1472°F/800°C Kitchen Fireproof Mitts Heat Proof for Grilling, Baking, Cooking, Welding Gloves Mitts - Red
$16.42
1 Piece Random Nonstick Enameled Cast Iron Pan/Pot (4 Styles: 10.25" Skillet/2Qt Saucepan/2.8Qt/4.8Qt Dutch Oven) – Healthy round Pot for Sourdough Bread Baking on All Stovetops, Mystery Cookware Box
$69.99
1-Piece 16.50 Inch Cast Iron Griddle Plate | Reversible Pre-Seasoned Cast Iron Grill Pan for Gas Stovetop | Double Sided Used on Open Fire & in Oven | Pre-Coated with Oil
$58.44
1/2" X 1/8" Lavalock High Temp BBQ Gasket Smoker Seal for Nomex Door Lid, Self Stick Grey
$46.82
1/3Pc Non-Stick BBQ Grill Mat 40*33Cm Baking Mat Cooking Grilling Sheet Heat Resistance Easily Cleaned Kitchen for Party
$1.31
10 Inch Griddle Spatula Holder Magnetic Design, Stainless Steel Grill Barbecue Tool Rack, Griddle Accessories for Blackstone Flat Top Griddle and Other Grill Griddles (2 Pcs)
$42.57
10 Inch Square Cast Iron Grill Pan Skillet Grill Pan with Easy Grease Draining for Grilling Bacon, Steak, and Meats, Stove, Fire and Oven Safe for Camping or Barbecue (Red)
$63.98
10" Portable round Barbecue BBQ Charcoal Grill with Handle for Outdoor Home Kitchen BBQ Picnic Camping
$53.77
10" Square Cast Iron Grill Pan Steak Pan Pre Seasoned Grill Pan with Easy Grease Drain Spout, with Large Loop Handles for Grilling Bacon, Steak, and Meats
$67.98
10-42 BBQ Brisket Rub - All-Natural Spice Seasoning for Steak, Rib, Beef Brisket - Barbecue Meat Seasoning Dry Rub - BBQ Rubs and Spices for Smoking and Grilling - No MSG, 0 Calorie - 10.5Oz Bottle
$35.98
10-42 BBQ Brisket Rub | All-Natural Spice Seasoning for Steak, Rib, Beef Brisket | Barbecue Meat Seasoning Dry Rub | BBQ Rubs and Spices for Smoking and Grilling | No MSG, 5.5.Oz Bottle
$31.37
10-Inch Skewer for BBQ Kebab, Unbleached Long Bamboo/Wood Roasting Sticks for Grill -Heavy Duty Thickness -Flat Stick Flag Handle -With Dust-Free Packaging (100-Pack)
$22.97
10-LED Grill Light, as Labeled
$40.18
100 Pcs Grilling Gloves Kit Disposable BBQ Gloves with 2 Pairs Cotton Liners Grilling Gloves Cooking Gloves Latex Free Nitrile Gloves for Outdoor Grilling Barbecue Cooking
$18.40
100% All-Natural Hardwood Pellets - Maple Wood (20 Lb. Bag) Perfect for Pellet Smokers, Smoky Wood-Fired Flavor
$53.96
100% Compostable Food Prep Gloves, Restaurant-Quality,For Food Handling, Powder-Free, 100 Count, Medium, Earth Friendly Highest ASTM D6400, US BPI and Europe OK Compost Certified, San Francisco
$20.30
100% Cotton Kitchen Apron with an Adjustable Neck with Long Ties for Women Men Chef
$40.14
12 Inch round Pizza Stone, Heavy Duty Cordierite Pizza Grilling Stone, Bread Baking Stone for RV Oven, Grill and Toaster Oven, Ideal for Baking Crisp Crust Pizza, Bread, Cookies and More
$73.03
12 Inch Lightweight Pre-Seasoned Cast Iron Griddle with Cleaning Kit - Smooth Polished Surface, Easy to Clean Cast Iron Skillets Use in the Oven, on the Stove or Grill, over a Campfire
$59.98