12 Common Grilling Mistakes that Can Damage Your Health (+ How to Grill Safer)

There’s nothing like getting family and friends together for a weekend of grilling in warm weather. However, before you get those healthy grilling recipes cooking, watch out for grilling mistakes.

Common grilling mistakes can affect more than flavor; they may increase exposure to harmful compounds, raise food poisoning risk, damage nutrients in food and even create fire hazards.

The most common grilling mistakes include:

• cooking meat over excessively high heat
• using sugary marinades that burn easily
• charring meat
• failing to precook thicker cuts
• grilling with dirty grates
• using unsafe cookware or foil
• cross-contaminating raw and cooked foods
• ignoring proper grill temperatures

Fortunately, most grilling mistakes are easy to avoid with a few healthier grilling techniques.

Quick answer: What are the biggest grilling mistakes?

The biggest grilling mistakes include charring meat, grilling over excessively high heat, using sugary marinades, failing to preheat or clean the grill properly, cross-contaminating foods, and cooking meat unevenly. These mistakes can increase exposure to compounds like heterocyclic amines (HCAs) and polycyclic aromatic hydrocarbons (PAHs) while also reducing flavor and food safety.

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Common grilling mistakes

Grilling mistakes pose some specific health risks, including exposure to high levels of cancer-causing compounds like HCAs. HCAs are formed in meat muscle tissue during high temperature cooking like grilling.

While most closely linked to stomach and colon cancers, HCAs also damage DNA and are linked to an increased risk in breast, liver, lung, prostate and skin cancer.

Luckily, there are relatively easy ways to protect yourself from HCAs and grilling carcinogens, along with other lesser-known grilling mistakes that could threaten your health.

1. You use store-bought marinades

If you marinade meat right, you can drastically reduce levels of cancer-causing compounds created during grilling. Read the ingredients on most store-bought marinades, however, and you’ll likely see many products contain sugar or high-fructose corn syrup, two problematic ingredients that actually make grilling much more dangerous.

Using thicker, store-bought marinades containing sweeteners like sugar, high-fructose corn syrup or even honey makes charring more likely, possibly increasing exposure to carcinogens.

Opt for thinner vinegar or lemon juice-based marinades rich in herbs and spices, including carcinogen-neutralizing rosemary, instead.

Experiments from the Cancer Research Center of Hawaii discovered teriyaki marinade led to a 67 percent reduction in carcinogenic HCAs. A marinade containing turmeric and garlic reduced HCAs by 50 percent.

Be careful, though, because sugary marinades can actually triple HCA levels.

The empowering take on this is that the American Institute for Cancer Research found that using healthy marinating recipes can actually lower HCA levels by a significant margin.

2. You grill directly over open flames

One of the most common grilling mistakes is cooking meat directly over aggressive flames for long periods. When fat drips onto flames, it creates smoke containing PAHs, compounds linked to increased cancer risk.

Instead, use indirect heat whenever possible, especially for thicker cuts of meat. Creating separate heat zones on your grill can help reduce flare-ups and prevent excessive charring.

Using a two-zone grilling setup is one of the easiest ways to grill healthier foods without sacrificing flavor.

3. You fire up worming meds

They say you are what you eat. Well, if you’re cooking up factory-farmed meat, you’re making one of the biggest grilling mistakes.

Drugs are so common in agriculture today that harmful medications routinely turn up in nonorganic meat. For instance, the United States Department of Agriculture’s Food Safety and Inspection Service detects medications like ivermectin (an animal wormer), flunixin (a non-steroidal anti-inflammatory drug), penicillin and ciprofloxacin (antibiotics), and other drugs at levels that are in violation of current regulations.

Some of these drugs are linked to neurological impacts, allergic reactions and kidney damage in humans. Exposing these meds in meat to high temperatures doesn’t always neutralize them all and, in some cases, can make them more toxic.

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If you’re grilling meat, always choose grass-fed, organic options. Of course, you can also choose organic veggies to grill, too. Just avoid ones on the dirty dozen list.

4. You wrap your taters in poison

Wrapping potatoes (or even fish) in aluminum foil with a dollop of butter is a fast and easy way to cook on the grill. The problem is aluminum foil has been shown to leach when exposed to high temperatures.

That’s concerning, since there’s a link between aluminum and dementia.

A 2011 study published in the International Journal of Electrochemical Science also found that exposing food in aluminum foil to heat caused leaching to occur in levels that would be considered unacceptable by the World Health Organization.

5. You use nonstick accessories

Nonstick grilling accessories, including the actual grates, spatulas, and grilling griddles, pans and mats, are tempting because they can make an otherwise messy cleanup a cinch. The problem is that perfluorooctanoic chemicals and related compounds commonly found in nonstick cookware have been linked to obesity, abnormal thyroid hormone levels, and toxicity to the brain, liver, prostate and kidneys.

While it may require more elbow grease during cleanup, skip the nonstick grilling accessories, and use ones without the chemical coatings instead.

6. You don’t clean your grill properly

Dirty grill grates can accumulate burnt food residue, grease and bacteria over time. When reheated, these residues may create additional smoke and off-flavors while increasing the risk of foodborne illness.

Before grilling, preheat the grill for several minutes, and scrub grates thoroughly with a grill brush or scraper. Cleaning immediately after cooking also helps prevent buildup.

7. You skip preheating the grill

Failing to preheat your grill is another common grilling mistake. Proper preheating helps food cook more evenly, reduces sticking and lowers the chance of flare-ups caused by excess moisture or grease.

Most grills should preheat for about 10 to 15 minutes before cooking.

8. You fail to precook

The American Institute for Cancer Research highly recommends precooking meat before firing it up on the grill. This helps reduce “drippings” on the grill, which turn into smoke full of cancer-causing PAHs.

Partially cooking meat on the stovetop or oven and then immediately transferring to a preheated grill helps lower levels of PAHs.

9. You over-char your food

While grill marks are appealing, heavily blackened or burnt meat may contain elevated levels of HCAs and PAHs. These compounds form when meat is cooked at very high temperatures or exposed to smoke and flames for too long.

To reduce grilling carcinogens:

• Avoid excessive blackening.
• Flip meat more frequently.
• Use marinades rich in herbs and antioxidants.
• Trim excess fat.
• Cook at moderate temperatures when possible.

10. You cross-contaminate raw and cooked foods

Using the same utensils or plates for raw and cooked meat is one of the most overlooked grilling mistakes. This can spread harmful bacteria and increase the risk of food poisoning.

Always use separate plates, cutting boards and utensils for raw meat and cooked foods.

11. You forget to grill vegetables and fruit

Healthy grilling doesn’t have to focus only on meat. Grilling vegetables, peaches, pineapple, zucchini, onions and peppers can add antioxidants, fiber and phytonutrients to your meal while lowering overall exposure to grilling carcinogens.

Plant-based foods do not produce HCAs the same way muscle meats do during high-heat cooking.

12. You guess when meat is done

Guessing doneness instead of using a meat thermometer can lead to undercooked or overcooked meat. Undercooking increases food safety risks, while overcooking raises exposure to HCAs and PAHs.

A digital meat thermometer helps ensure food reaches safe internal temperatures without unnecessary charring.

Safer alternatives to grilling mistakes

Healthy grilling tips to reduce carcinogens

To grill more safely:

• Marinate meats before grilling.
• Avoid excessive charring.
• Use indirect heat.
• Flip foods frequently.
• Trim excess fat.
• Choose grass-fed or organic meats when possible.
• Grill more vegetables and fruits.
• Avoid nonstick coatings at very high temperatures.
• Clean grill grates regularly.
• Use a meat thermometer.

Frequently asked questions

What is the biggest mistake when grilling?

Cooking meat over excessively high heat is one of the biggest grilling mistakes because it increases charring and the formation of harmful compounds like HCAs and PAHs.

Is grilled meat unhealthy?

Grilled meat can be part of a healthy diet, but excessive charring and cooking over open flames may increase exposure to carcinogenic compounds. Using marinades, moderate heat and proper grilling techniques can reduce risks.

How do you reduce carcinogens when grilling?

To reduce grilling carcinogens:

• Marinate meat beforehand.
• Avoid burning food.
• Use indirect heat.
• Trim excess fat.
• Flip meat frequently.
• Grill vegetables more often.

What foods should you avoid grilling?

Highly processed meats and foods coated in sugary sauces are more likely to burn and create harmful compounds during grilling.

Is charcoal or gas grilling healthier?

Gas grills generally produce less smoke than charcoal grills, which may reduce exposure to some harmful compounds. However, healthier grilling depends more on cooking temperature, flare-up control and avoiding charring.

Conclusion

• Grilling can be a healthy and enjoyable way to cook, but avoiding common grilling mistakes is essential for both flavor and long-term health. From charring meat and cooking over excessive heat to using sugary marinades and neglecting grill safety, small habits can significantly impact the quality and safety of your food.
• Fortunately, healthier grilling doesn’t require giving up your favorite barbecue meals. Using moderate heat, marinating meats, preventing flare-ups, cleaning grill grates regularly and incorporating more vegetables into your cookouts can help reduce exposure to harmful compounds while improving taste and nutrition.
• Whether you’re grilling steaks, burgers, chicken or vegetables, a few smarter grilling techniques can help you enjoy safer, healthier meals all summer long. By understanding the biggest grilling mistakes to avoid, you can protect your health while still enjoying everything you love about outdoor cooking.