Risky or Not?

A short podcast about everyday risks from germs

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A fried egg sizzles in a cast iron skillet filled with dark bacon or sausage grease. The yolk is vibrant and intact, surrounded by bubbly whites. In the background, a small jar of congealed grease sits on a beige cloth, suggesting long-term room temperature storage.

795. Cooking in Bacon and/or Sausage Grease Stored Room Temperature for Up to 30 Days

July 09, 2025 by Don Schaffner

Dr. Don and Professor Ben talk about the risks from cooking in bacon and/or sausage grease stored room temperature for up to 30 days.

Dr. Don - not risky 👍🏼
Professor Ben - not risky 👍🏼

  • Blackshore (TV Series 2024– ) - IMDb
  • Current Food Safety Issues of Home-prepared Vegetables and Herbs Stored in Oil
  • Risky or Not?
  • Bacon Method
  • The 100 Best Movies of the 21st Century - The New York Times
  • Apple Music 100 Best Albums
July 09, 2025 /Don Schaffner
Bacon, Sausage, Grease, Time temperature control for safety food

A hotel breakfast buffet features a large stainless steel vat filled with lumpy oatmeal. A sign above reads “COMMUNITY VAT OF OATMEAL MADE EARLIER THAT DAY.” Surrounding the vat are stacked plates, bagels in a wire rack, glass cups, and coffee dispensers, creating a utilitarian yet oddly inviting scene.

794. Cold-Ish, Prepared Oatmeal From a Community Vat Made Earlier That Day

July 07, 2025 by Don Schaffner

Dr. Don and Professor Ben talk about the risks eating cold-ish, prepared oatmeal from a community vat made earlier that day.

Dr. Don - not risky 👍🏼
Professor Ben - not risky 👍🏼

  • Tears in rain monologue - Wikipedia
  • 766. Room Temperature Overnight Oats — Risky or Not?
  • Bacterial Pathogens and Indicators in Oats - April 1, 2018 to March 31, 2020 - inspection.canada.ca
  • Marriott International’s World-Class Recipe for Safe, Great Foods | Food Safety
July 07, 2025 /Don Schaffner
Oatmeal, Time temperature control for safety food, Temperature

A square image shows an opened glass jar of mayonnaise sitting on a wooden pantry shelf. The mayo appears discolored and crusty around the rim, suggesting spoilage. The dim lighting and aged wood add to the sense of neglect and food safety concern.

787. Mayonnaise From a Recently Opened Jar Kept in a Cabinet Less Than a Week

June 20, 2025 by Don Schaffner

Dr. Don and Professor Ben talk about the risks from a jar of mayonnaise that was opened and then accidentally left at room temperature for less than a week

Dr. Don - not risky 👍🏼
Professor Ben - not risky 👍🏼

  • Microbiological Safety of Mayonnaise, Salad Dressings, and Sauces Produced in the United States: A Review - ScienceDirect
  • Review: Fate of pathogens in home-made mayonnaise and related products - ScienceDirect
  • An Assessment of Escherichia coli O157:H7 Contamination Risks in Commercial Mayonnaise from Pasteurized Eggs and Environmental Sources, and Behavior in Low-pH Dressings - ScienceDirect
  • A Review of Temperature, pH, and Other Factors that Influence the Survival of Salmonella in Mayonnaise and Other Raw Egg Products
  • Models for the Inactivation of Foodborne Pathogens in Salad Dressing from Challenge Studies - ScienceDirect
  • Mayonnaise - an overview | ScienceDirect Topics
  • Independent Writer, Speaker, and Broadcaster - Merlin Mann


June 20, 2025 /Don Schaffner
Mayonnaise, Time temperature control for safety food

A clear glass holds partially melted ice water with a single penny resting atop the remaining ice. The ice forms a cloudy disk floating above the water line. The background is a neutral surface, emphasizing the simple, almost scientific feel of the composition.

775. Coin in Cup for Freezer Safety After Power Outages

May 23, 2025 by Don Schaffner

Dr. Don and Professor Ben talk about the risks from using the coin in cup for freezer safety tip after power outages.

Dr. Don - risky ☣️
Professor Ben - risky ☣️

  • Food Safety After a Storm | N.C. Cooperative Extension
  • Does a Coin in a Cup of Ice Accurately Tell You If Your Freezer Lost Power? | Snopes.com
  • Why Are People Putting A Cup Of Ice With A Coin On Top In Their Freezer?
  • Temperature & Humidity | Lascar Electronics
  • Amazon.com: tempi.fi Wireless Temperature and Humidity Sensor - Developed in The USA - 24/7 Data Logger with Alarm – Bluetooth Smart Thermometer and Hygrometer - Bluetooth Only - Not WiFi : Industrial & Scientific


May 23, 2025 /Don Schaffner
Freezer, Time temperature control for safety food, Power outage

DALL·E image text: A glass bowl of overnight oats sits on a dark countertop, glowing ominously with green light. Wisps of toxic-looking green mist rise from the oats, surrounded by biohazard symbols, creating an eerie, dangerous atmosphere that hints at bacterial contamination.

766. Room Temperature Overnight Oats

May 02, 2025 by Don Schaffner

Dr. Don and Professor Ben talk about the risks from eating overnight oats made a room temperature

Dr. Don - risky ☣️
Professor Ben - risky ☣️

  • oats search on Risky or Not?
  • Overnight Oats Recipe - How to Make Overnight Oats
  • The Pioneer Woman Unnecessarily Sends a Terrible Message : r/foodnetwork
  • The Truth About Overnight Oats - My Longevity Kitchen
  • Spore germination - ScienceDirect
  • Bacteria of Bacillus cereus group in cereals at retail - Polish Journal of Food and Nutrition Sciences - Tom 59, Numer 1 (2009) - AGRO - Yadda
  • Potential of selected infant food formulas for production of Bacillus cereus emetic toxin, cereulide - ScienceDirect
  • Detection of Emetic Bacillus cereus from Ready-to-eat Foods in Markets and its Production of Cereulide under Simulated Conditions -Journal of the FoodService Safety | Korea Science
  • Bacterial Pathogens and Indicators in Oats - April 1, 2018 to March 31, 2020 - inspection.canada.ca
  • Oats: characteristics and quality requirements - ScienceDirect
May 02, 2025 /Don Schaffner
Bacillus cereus, Oats, Time temperature control for safety food

This is a screen capture from the actual TikTok video.

759. Big Open Jar of Canned Peaches at Room Temperature

April 16, 2025 by Don Schaffner

Dr. Don and Professor Ben talk about the risks from eating peaches from big open jar of canned peaches kept at room temperature.

Dr. Don - not risky 👍🏼
Professor Ben - not risky 👍🏼

  • Conference for Food Protection
  • #peachlady #peaches @Costco Wholesale | peach jar lady | TikTok
  • Zalea Peaches. Any one have experience with them? : r/Costco
  • McCullough recalls decades of food science work upon retirement from UGA-Griffin | University of Georgia Griffin Campus
  • Pathogen Modeling Program (PMP) Online
  • Further Studies on Development of Clostridium botulinum in Refrigerated Foods.
  • Clemson pH Values of Common Foods and Ingredients
  • Pruno - Wikipedia
  • Peaches En Regalia - YouTube
  • The Presidents of the United States of America – Peaches Lyrics | Genius Lyrics
April 16, 2025 /Don Schaffner
Time temperature control for safety food, Peaches

A green juice bottle sits on a car seat, partially frozen with visible ice crystals. Frost covers the car windows, and condensation clings to the bottle. The early morning light casts a cold, bluish hue, emphasizing the chill of a winter night spent inside the vehicle.

751. Leaving Green Juice in the Car Overnight in the Winter

March 28, 2025 by Don Schaffner

Dr. Don and Professor Ben talk about the risks from consuming Green Juice left in the car overnight in the winter.

Dr. Don - not risky 👍🏼
Professor Ben - not risky 👍🏼

  • Green Goodness® - Bolthouse Farms
  • FAQs - Bolthouse Farms
  • Botulism Associated with Commercial Carrot Juice --- Georgia and Florida, September 2006
  • 100% Carrot - Bolthouse Farms
March 28, 2025 /Don Schaffner
Time temperature control for safety food, Juice, Pasteurization

A festive kitchen decorated for St. Patrick's Day features green streamers, shamrocks, and themed treats. In contrast, a shopping bag with a forgotten package of corned beef and bread sits quietly on the counter, slightly tucked away, hinting at a small oversight amid the celebration.

750. Corned Beef Left Out for a Couple of Hours

March 26, 2025 by Don Schaffner

Dr. Don and Professor Ben talk about the risks from eating corned beef left out for a couple of hours.

Dr. Don - not risky 👍🏼
Professor Ben - not risky 👍🏼

  • What is the term for a 750th anniversary in The AnswerBank: Phrases & Sayings
  • Tony Hawk - Wikipedia
  • LUCKY CHARMS - 60s 70s 80s 90s Commercials Compilation - YouTube
  • Corned beef - Wikipedia
  • No such thing as 'uncured' corned beef, Penn State meat expert says | Penn State University
  • Curing (food preservation) - Wikipedia
March 26, 2025 /Don Schaffner
Time temperature control for safety food, Corned beef, Sodium Nitrate

Golden cookie-style lemon bars with glistening lemon curd sit on a rustic surface. Their edges are slightly dry and cracked, showing signs of age, yet they still look rich and tempting. The vibrant yellow curd contrasts beautifully with the soft, crumbly base, inviting a bite despite their two-week-old appearance.

749. Two Week Old Cookie Style Lemon Bars

March 24, 2025 by Don Schaffner

Dr. Don and Professor Ben talk about the risks from eating two week old cookie style lemon bars.

Dr. Don - not risky 👍🏼
Professor Ben - not risky 👍🏼

  • Easy Lemon Bar Cookies - Cambrea Bakes
  • Recipes - Texas Cottage Food Law
March 24, 2025 /Don Schaffner
Time temperature control for safety food, Lemon curd, Cookies

The image shows a stainless steel pan with murky, dirty water sitting on a kitchen counter overnight. The water has a greasy film and floating residue. The pan has dried streaks on its sides. The counter has scattered crumbs and stains, illuminated by soft morning light filtering through a window.

745. Reusing Pasta Water That's Been Sitting Out Overnight

March 14, 2025 by Don Schaffner

Dr. Don and Professor Ben talk about the risks reusing pasta water that's been sitting out overnight.

Dr. Don - risky ☣️
Professor Ben - risky ☣️

  • NACCHO
  • Bacillus sp. R2 α-amylase production optimization: Pasta cooking water as medium of amylase production | African Journal of Biotechnology
  • Fatal Family Outbreak of Bacillus cereus-Associated Food Poisoning - PMC
  • Predictive Model for Growth of Bacillus cereus at Temperatures Applicable to Cooling of Cooked Pasta - Juneja - 2019 - Journal of Food Science - Wiley Online Library
  • Microbiological Quality of Raw Dried Pasta from the German Market, with Special Emphasis on Cronobacter Species - Akineden - 2015 - Journal of Food Science - Wiley Online Library
  • A systematic review and meta-analysis of the prevalence of Bacillus cereus in foods - ScienceDirect
  • A survey study on safety and microbial quality of “gluten-free” products made in Italian pasta factories - ScienceDirect
  • The occurrence of Bacillus cereus in fast foods: International Journal of Food Sciences and Nutrition: Vol 49, No 4
  • Toxin producing Bacillus cereus persist in ready-to-reheat spaghetti Bolognese mainly in vegetative state - ScienceDirect
  • Microbiological Quality of Filled Pasta in Relation to the Nature of Heat Treatment - ScienceDirect
March 14, 2025 /Don Schaffner
Bacillus, Heat stable toxin, Pasta, Time temperature control for safety food

The image features a plate of freshly cooked shrimp with dipping sauce on a wooden table. In the background, a television displays a football game. A majestic owl with striking feathers perches nearby, gazing intently at the shrimp. The cozy living room setting has warm lighting, creating a relaxed atmosphere.

744. Superb Owl Shrimp That's Been Out of Temperature, Refrigerated and Reheated

March 12, 2025 by Don Schaffner

Dr. Don and Professor Ben talk about the risks from eating Superb Owl shrimp that's been out of temperature, refrigerated and reheated.

Dr. Don - not risky 👍🏼
Professor Ben - not risky 👍🏼

  • Watch the Football! ⚽ | That Mitchell and Webb Look - BBC - YouTube
  • 2025 Super Bowl LIX Sunday - When, Where & More - NFL.com
  • A comprehensive review of the spoilage of shrimp and advances in various indicators/sensors for shrimp spoilage monitoring - ScienceDirect
  • FoodKeeper App | FoodSafety.gov
  • Food Lion Shrimp Ring, with Cocktail Sauce, Cooked Same-Day Delivery or Pickup | Food Lion


March 12, 2025 /Don Schaffner
Shrimp, Time temperature control for safety food, Leftovers

Chopped onions, ginger, and garlic are neatly sun-dried on a clean wire rack over a wooden table in a modern suburban patio. The bright, soft sunlight highlights the fresh produce. The backdrop features a well-maintained backyard with a green lawn, stylish outdoor furniture, and a serene, upscale ambiance.

734. Sun Drying Onions, Ginger and Garlic for 4 Days

February 17, 2025 by Don Schaffner

Dr. Don and Professor Ben talk about the risks of sun drying onions, ginger and garlic for 4 days.

Dr. Don - risky ☣️
Professor Ben - risky ☣️

  • Study the effect of sun, oven and microwave drying on quality of onion slices - ScienceDirect
  • Effect of Drying Characteristics of Garlic
  • Salmonella survival during thermal dehydration of fresh garlic and storage of dehydrated garlic products - PubMed
  • Survival of common foodborne pathogens on dates, sundried tomatoes, and dried pluots at refrigerated and ambient temperatures - ScienceDirect
  • Survival or Growth of Inoculated Escherichia coli O157:H7 and Salmonella on Yellow Onions (Allium cepa)under Conditions Simulating Food Service and Consumer Handling and Storage - ScienceDirect


February 17, 2025 /Don Schaffner
Sun-drying, Onions, Garlic, Ginger, Salmonella, Time temperature control for safety food

The image shows an upright freezer in a dimly lit garage, surrounded by clutter like tools and boxes. The freezer door is slightly ajar, and a bright warning light near the top is prominently flashing, creating a sense of urgency against the muted tones of the garage setting.

719. Freezer Ajar for 24 Hours

January 13, 2025 by Don Schaffner

Dr. Don and Professor Ben talk about the risks from food in a freezer ajar for 24 hours.

Dr. Don - not risky 👍🏼
Professor Ben - not risky 👍🏼

  • Homepage - STOCKART
  • Download 1000's of high resolution images | Stockarch Free Stock Photo Archive
  • Avoid Foodborne Illness During Temporary Power Outages | FoodSafety.gov
  • Food safety experts agree with 'when in doubt, throw it out,' here's why | Fox News


January 13, 2025 /Don Schaffner
Freezer, Time temperature control for safety food

A festive scene with a plate of cookies, one bitten, and partially drunk milk left for Santa, alongside carrots for the reindeer. Warm light from a fireplace and Christmas decor, including a tree and stockings, set a cozy ambiance. In the background, Santa is glimpsed departing the room.

711. Leaving Cookies and Milk Out for Santa

December 25, 2024 by Don Schaffner

Dr. Don and Professor Ben talk about the risks of leaving cookies and milk out for Santa, and carrots for his reindeer.

Dr. Don - not risky 👍🏼
Professor Ben - not risky 👍🏼

  • How To Celebrate The Winter Solstice
  • How does Santa make it around the world in one night? | HowStuffWorks
  • Is Santa Claus immune to COVID-19? - YouTube
  • Immunologists convinced Santa has a great immune system - News & Events | Trinity College Dublin
December 25, 2024 /Don Schaffner
Milk, Cookies, Santa, Time temperature control for safety food

This image features a half-empty, transparent container of guacamole placed on a kitchen counter. The guacamole itself is textured, displaying distinct chunks of small diced tomatoes, onions, and cilantro, which add a colorful and fresh appearance to the green base. The guacamole's surface has ridges and swirls, showing evidence of recent scooping.

The kitchen is depicted in the middle of the night, with dim, warm lighting emanating from an overhead source, casting gentle, elongated shadows on the counter. The counter itself is subtly textured, resembling granite or a similar polished stone surface with small, faint speckles.

The container is positioned slightly askew, hinting at casual use. Reflections on the container's plastic sides indicate the soft glow from the kitchen's light, enhancing the late-night ambiance. Overall, the scene conveys a feeling of nighttime snacking, with its quiet and tranquil setting.

692. Guacamole Left Out Overnight

November 11, 2024 by Don Schaffner

Dr. Don and Professor Ben talk about the risks of eating guacamole left out overnight.

Dr. Don - risky ☣️
Professor Ben - risky ☣️

  • Mild Guacamole - Yucatan Guacamole
  • Yucatan Authentic Guacamole 16 oz, 16 oz - Kroger
  • Avocados - Food Source Information
  • Behavior of Listeria monocytogenes in Avocado Pulp and Processed Guacamole - ScienceDirect
  • Effect of storage temperature and time on the behavior of Salmonella, Listeria monocytogenes, and background microbiota on whole fresh avocados (Persea americana var Hass) - ScienceDirect
  • Evaluation of Avocados as a Possible Source of Listeria monocytogenes Infections, United States, 2016 to 2019 - ScienceDirect
  • Growth Kinetics of Listeria monocytogenes in Cut Produce - ScienceDirect


November 11, 2024 /Don Schaffner
Guacamole, Avocado, Time temperature control for safety food

DALL·E - A realistic image of a cut avocado wrapped in plastic wrap, sitting on a kitchen counter. The kitchen counter is dimly lit, indicating it's the middle of the night.

665. Leaving a Cut Unripe Avocado at Room Temperature for a Day

September 09, 2024 by Don Schaffner

Dr. Don and Professor Ben talk about the risks from leaving a cut unripe avocado at room temperature for a day.

Dr. Don - risky ☣️
Professor Ben - risky ☣️

  • Christopher Kimball’s Milk Street | Recipes, TV and Cooking Tips
  • America's Test Kitchen: Recipes & Reviews You Can Trust | Stream Every Episode | America’s Test Kitchen
  • Richard Kimble | The Fugitive Wiki | Fandom
  • Salmonella, Listeria monocytogenes, and Indicator Microorganisms on Hass Avocados Sold at Retail Markets in Guadalajara, Mexico - ScienceDirect
  • Behaviors of Salmonella enterica serovar Typhimurium and Listeria monocytogenes on whole avocado during storage at 21 or 7°C and their reduction by aqueous chlorine dioxide and peroxyacetic acid - ScienceDirect
  • Effect of storage temperature and time on the behavior of Salmonella, Listeria monocytogenes, and background microbiota on whole fresh avocados (Persea americana var Hass) - ScienceDirect
  • Survival of Salmonella spp., Escherichia coli O157:H7, and Listeria monocytogenes in Ready-to-Eat “Guacamole”: Role of Added Antimicrobials - PMC
  • Quality variables of “Hass” avocado stored in modified atmosphere packaging
September 09, 2024 /Don Schaffner
Avocado, Salmonella, Listeria, Time temperature control for safety food

DALL·E - A half of a cut watermelon sitting on a kitchen counter in the middle of the night. The kitchen is dimly lit, with a soft glow from a nearby light.

654. Cut Watermelon at Room Temperature for One Day or More

August 14, 2024 by Don Schaffner

Dr. Don and Professor Ben talk about the risks from eating cut watermelon at room temperature for a day or more.

Dr. Don - risky ☣️
Professor Ben - risky ☣️

  • Modeling the growth of Listeria monocytogenes on cut cantaloupe, honeydew and watermelon - ScienceDirect
  • Survival and Growth of Enterohemorrhagic Escherichia coli O157:H7 in Cantaloupe and Watermelon - ScienceDirect
  • Growth of Salmonella spp. in Cantaloupe, Watermelon, and Honeydew Melons - ScienceDirect
  • Merch — Risky or Not?
  • Caricature Definition & Meaning - Merriam-Webster
August 14, 2024 /Don Schaffner
Watermelon, Time temperature control for safety food, Listeria, Salmonella

DALL·E - A plate of Jamaican dish Escovitch on a wooden table. The dish features fried fish topped with pickled vegetables such as carrots, and bell peppers.

653. New York Times Escovitch Fish Recipe at Room Temperature for 12 Hours

August 12, 2024 by Don Schaffner

Dr. Don and Professor Ben talk about the risks from eating escovitch that has been held at room temperature for 12 hours.

Dr. Don - risky ☣️
Professor Ben - not risky 👍🏼

  • Escovitch Fish Recipe
  • Ceviche - Wikipedia
  • Escovitch food poisoning - Google Scholar
  • Effect of Lime Juice on Vibrio parahaemolyticus and Salmonella enterica Inactivation during the Preparation of the Raw Fish Dish Ceviche - ScienceDirect
  • Microbiological safety and quality of ceviche, poke, and sushi dishes sold at retail outlets in Orange County, CA: Heliyon
  • Fried Jamaican Escovitch Fish | Meiko and The Dish
  • The Caribbean people have created a wealth of unique dishes based on native foods
  • BEAM Dashboard | CDC
  • Merch — Risky or Not?
August 12, 2024 /Don Schaffner
Fish, Time temperature control for safety food, Escovitch, pH

DALL·E A singara pastry sitting on a pile of dirty money next to a glass of sangria on a rustic table.

624. Arden's Lukewarm Singara

June 05, 2024 by Don Schaffner

Dr. Don and Professor Ben talk about the risks of consuming lukewarm singara in Bangladesh that might have been sitting on some money.

Dr. Don - not risky 👍🏼
Professor Ben - not risky 👍🏼

  • Easy Traditional Red Sangria | Minimalist Baker Recipes
  • Singara Recipe | Bengali Shingara » Dassana's Veg Recipes
  • Dan Bern quote: So often these days eating Indian food passes for spirituality...
  • Money and transmission of bacteria | Antimicrobial Resistance & Infection Control
June 05, 2024 /Don Schaffner
Singara, Samosa, Time temperature control for safety food, Cross-contamination

DALL·E - A dark and ominous image showing a single small apple slice inside a tiny, translucent plastic bag resting on a kitchen counter.

604. A Cut Apple That Has Been to School Twice

April 20, 2024 by Don Schaffner

Dr. Don and Professor Ben talk about the risks of sending a kid to school with a cut apple that has already been to school the day before.

Dr. Don - not risky 👍🏼
Professor Ben - not risky 👍🏼

  • ComBase
  • Growth of Listeria monocytogenes within a Caramel-Coated Apple Microenvironment | mBio
  • Multistate outbreak of Listeria monocytogenes infections linked to whole apples used in commercially produced, prepackaged caramel apples: United States, 2014–2015 | Epidemiology & Infection | Cambridge Core
  • Survival of outbreak, food, and environmental strains of Listeria monocytogenes on whole apples as affected by cultivar and wax coating | Scientific Reports
  • Fate of Listeria monocytogenes in Fresh Apples and Caramel Apples - ScienceDirect
  • Prevalence of Listeria Species on Food Contact Surfaces in Washington State Apple Packinghouses | Applied and Environmental Microbiology
  • https://apsjournals.apsnet.org/doi/pdf/10.1094/pdis.2000.84.2.177
  • Bacterial meningitis in the United States in 1995. Active Surveillance Team - PubMed
  • Foods | Free Full-Text | Updated Parameters for Listeria monocytogenes Dose–Response Model Considering Pathogen Virulence and Age and Sex of Consumer
April 20, 2024 /Don Schaffner
Apple, Cut fruit, Listeria, Time temperature control for safety food
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