The truth about McDonald's Chicken McNuggets

Updated May 11, 2017

McDonald's started out as a beefy burger joint back in 1948, but the world-famous fast-food chain has been offering another high-protein meat – chicken – since the specially molded McNugget made its debut in 1983.

Perhaps now as iconic as the Big Mac or Quarter Pounder, these tiny deep-fried chunks seem harmless on the surface, which consists of a tempura-like batter that has been cooked to a golden perfection. Over the past 30 years McDonald's has added 10 delectable dipping sauces, including spicy buffalo, honey mustard and tangy barbeque, to the McMenu, making these bite-sized bits appealing to the taste of just about anyone – adults and kids alike.

White poultry has less saturated fat than red meat, which means it generally won't raise your cholesterol and contribute to heart disease. While that might appear to be a healthy advantage, the other ingredients McDonald's adds make its nutritional value questionable. If you're not too squeamish or too chicken to hear all the details, read on to get some nuggets of truth about these little golden treats.

THE SUSPECT: McDonald's Chicken McNuggets (6-piece serving size, 100g (3.4 oz))

THE DETECTIVE: Christopher Ochner, Ph.D.,a research associate at New York Obesity Nutrition Research Center at St. Luke’s Roosevelt Hospital Center. Ochner is very familiar with McDonald's menu. A few years ago, he conducted his own “Super Size Me”-type diet experiment: Every day for two months he ate one meal at the fast food restaurant as part of a study. His findings have yet to be published.


Without sauce: 280 calories, 18 grams (0.6 oz) fat, 18 grams (0.6 oz) carbs, 13 grams (0.5 oz) protein, 0 grams sugar, 540 milligrams (0.02 oz) sodium, 1 gram (0.03 oz) dietary fibre

With tangy barbeque sauce: 330 calories, 18 grams (0.6 oz) fat, 29 grams carbs (1 oz), 10 grams sugar (0.35 oz), 800 milligrams (0.02 oz) sodium, 1 gram (0.03 oz) dietary fibre, 13 grams (0.5 oz) protein


Chicken McNuggets: White boneless chicken, water, food starch-modified, salt, seasoning (autolysed yeast extract, salt, wheat starch, natural flavouring [botanical source], safflower oil, dextrose, citric acid), sodium phosphates, natural flavour (botanical source). Battered and breaded with: water, enriched flour (bleached wheat flour, niacin, reduced iron, thiamin mononitrate, riboflavin, folic acid), yellow corn flour, bleached wheat flour, food starch-modified, salt, leavening (baking soda, sodium acid pyrophosphate, sodium aluminum phosphate, monocalcium phosphate, calcium lactate), spices, wheat starch, dextrose, corn starch. Contains: wheat.

*Prepared in vegetable oil (canola oil, corn oil, soybean oil, hydrogenated soybean oil with TBHQ and citric acid added to preserve freshness). Dimethylpolysiloxane added as an antifoaming agent. Prepared in vegetable oil (Canola oil, corn oil, soybean oil, hydrogenated soybean oil with TBHQ and citric acid added to preserve freshness). Dimethylpolysiloxane added as an antifoaming agent.

Tangy Barbeque Sauce: High fructose corn syrup, water, tomato paste, grape vinegar, distilled vinegar, salt, soy sauce (water, wheat, soybeans, salt), food starch-modified, spices, dextrose, soybean oil, natural smoke flavour (plant source), xanthan gum, caramel colour, garlic powder, cellulose gum, dried chili peppers, malic acid, natural flavour (fruit and vegetable source), onion powder, sodium benzoate (preservative), succinic acid. Allergens: wheat and soy.

So while McNuggets are "made with 100 percent USDA Grade A chicken," as states, there's no way of knowing what percentage of the whole nugget is actually chicken.

Christopher Ochner, Ph.D.


CHICKEN: It's always good to see the actual food listed as the first ingredient: White boneless chicken. “The first item on the nutrition label means the food contains more of that one item than any other single ingredient,” said Ochner. So while McNuggets are "made with 100 percent USDA Grade A chicken," as states (note it says “made with” not “made of,” Ochner pointed out), there's no way of knowing what percentage of the whole nugget is actually chicken.

“White boneless chicken is almost a pure protein, boasting a phenomenal 0.2 protein (grams):kcal ratio with less than 20 percent fat,” explained Ochner. “McNuggets, on the other hand, have a very mediocre 0.046 protein:kcal ratio with 57 percent of kcal from fat. This seems to suggest that the other ingredients, besides chicken, are the primary driver of the macro-nutrient profile,” he said.

With over 30 ingredients listed, it's easy to see how chicken may actually play a minor role in this dish. It may also explain why the chicken seemed to disappear in an alarming YouTube time-lapse video shot in March 2013 (see link below in the “Resources” section of this article), showing McNuggets left at room temperature over a two-day period. When Ochner performed this experiment himself (he left them in the fridge for 10 days), the so-called chicken in the McNuggets pieces remained intact. This disturbing mystery remains unsolved.

FAT: Holy cow, er, chicken: McNuggets are 57 percent fat! One big fat contributor may be hydrogenated soybean oil, which is loaded with trans fats. “I don’t suspect there is a ton of it in there because the saturated fat is relatively low,” Ocher said. “However, some of it is almost certainly still partially hydrogenated, which also helps with preservation.”

TBHQ (TERTIARY BUTYLHYDROQUINONE): You might recognise this hard-to-pronounce ingredient (hence the acronym) from our recent “What's Really Inside those McDonald's French Fries” exposé (see link below in the “Resources” section). This powerful petroleum-based preservative (which is also found in varnishes, lacquers, pesticide products, cosmetics, and perfumes) may be used to help the chicken and other ingredients maintain their distinct shapes. Consumed in high doses – and it's hard to determine exactly how much is added to McNuggets – this chemical can be toxic. Possible side effects include nausea, delirium, collapse, tinnitus (ringing in the ears) and vomiting. Some studies have linked it to hyperactivity in kids, asthma, rhinitis, dermatitis, aggravated ADHD symptoms and restlessness. Furthermore, animal studies have reported that it may cause DNA damage. This mounting scientific evidence was enough that McDonald’s entirely removed this bad-news ingredient from the UK version of the McNugget.

*DIMETHYLPOLYSILOXANE: Another ingredient used in McNuggets that didn’t meet UK health standards. The silicone-based anti-foaming agent has also been removed from the United Kingdom's McNugget ingredient list – and with good reason, too. While admits that “a drop of an additive in vegetable oil is added to simply prevent foaming on the surface that naturally occurs in cooking,” what it isn't telling you is that this same chemical is found in silly putty, contact lenses, medical devices, shampoos, lubricating oils, heat-resistant tiles and breast implants. “No studies have suggested any toxic effects,” Ochner said, “but it's definitely gross to think about.”

*AUTOLYSED YEAST EXTRA: This sneaky ingredient contains monosodium glutamate (also known as MSG) which allows McDonald's to create the illusion that you're getting more protein with each bite than you actually are. This cheap, flavour-enhancing filler is FDA-approved (even though many people are said to have MSG sensitivity and suffer from headaches, nausea, and heart palpitations when they consume it). That said, even if you’re not one of the people affected with MSG sensitivity, including MSG in the McNuggets recipe is still a devious way of cheating you the consumer out of real chicken (seriously, how much poultry is in those things?!), cutting corners on costs and avoiding listing the word “MSG” on the label.

*SODIUM ALUMINUM PHOSPHATE: Key word here is “aluminium foil.” You know, the silvery metallic element you use to line your oven rack before baking or roasting? Ochner explained that this ingredient is synthetically produced from aluminium as well as phosphoric acid and sodium hydroxide. While this all sounds highly unappetising, its function isn't to entice you but rather to act as a leavening agent that's often used in flour mixes, like the breaded part of the McNugget. In terms of its safety, the FDA allows a daily aluminium intake that ranges from 10 to 100 mg, so as long as McDonald's stays within that range, it's within the legally acceptable limit.

THE VERDICT: McNuggets are McNasty.

THE SENTENCE: Though they're supposedly made of good-for-you lean white meat chicken, McDonald's McNuggets are far from healthy and nutritious. So, if your options are all about deciding whether to nosh on a McNugget or not, your best bet is to fly the coop (just like the disappearing white stuff in that now-you-see-me-now-you-don't YouTube video you can watch by following the link below in the “Resource” section).

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About the Author

Cristina Goyanes is a Brooklyn-based writer and editor, specializing in wellness, fitness, sports and travel. She is a contributor to national men's and women's lifestyle publications and websites.