Can Mayonnaise Kill Head Lice?

If you search online for remedies to eliminate head lice, you’ll find all sorts of products and recommendations—from traditional lice remedies available at drug stores, to online-only alternative products, to home remedies using common household products. One of the most commonly recommended household products is mayonnaise.

That’s right. Some parents suggest spreading your favorite sandwich condiment onto a child’s head in order to kill head lice. The idea is that the thick pasty substance will clog the insects’ breathing mechanism, suffocating each louse to death. You simply wrap the child’s head in some kind of plastic to contain it, and leave the mayonnaise on overnight. Wash it out in the morning and the lice are gone.

There are three problems with this approach. First, there is scant medical evidence that mayonnaise or any other home remedy actually works. The National Association of School Nurses tells people, “There is no scientific evidence that home remedies are effective treatments.” The Centers for Disease Control and Prevention (CDC) says the same thing: “CDC does not have clear scientific evidence to determine if suffocation of head lice with mayonnaise, olive oil, margarine, butter, or similar substances is an effective form of treatment.”

Just because there is no medical evidence that mayonnaise doesn’t successfully eradicate head lice doesn’t mean it doesn’t work. However, the second problem with the mayonnaise is that, even if it kills head lice, it doesn’t kill lice eggs (nits). Eggs don’t breath and cannot be suffocated. Most lice experts will tell you that killing the eggs is the most challenging part of head-lice treatment. Female lice can lay around 5 eggs per day, and each egg takes 7-10 days to hatch. Lice eggs are almost indestructible (see below), and affix to hair follicles with tremendous strength. Odds are that when you rinse the mayo out of a child’s head, the eggs will still be there and hatch a few days later. The only sure way to remove them is to “nitpick,” or pick them out one by one with a lice comb and a great pair of eyes.

The last reason mayonnaise is not a great idea for lice treatment is that it can be very unsafe to leave a child’s head wrapped in plastic overnight. The risk of an accident is too great. There have been reports of children suffocating from the plastic bags, as well as getting food poisoining from the mayonnaise.

As mentioned above, nits are almost indestructible. Until recently, there was not a sure way to remove lice eggs short of painstaking nitpicking. Fortunately, scientists at the University of Utah have developed an entirely new approach to head-lice removal based on a medical device that dehydrates and kills both live lice and eggs. It’s called AirAllé, and it has been evaluated and cleared by the FDA as a safe and effective form of head lice removal.

The AirAllé device uses carefully controlled heated air to dehydrate and kill head lice. It has been proven to kill live lice and 99.2 percent of lice eggs, and the entire process takes about 90 minutes.

This is great news for parents, school nurses, teachers and others involved in the battle against head lice. Instead of weeks of combing and checking for live lice and eggs, worrying whether or not they’ve gotten them all, there is a now a proven removal process that is about as disruptive as getting a haircut.

The AirAllé-based lice removal is available exclusively at Lice Clinics of America treatment centers throughout the United States and around the world. There are currently more than 100 clinics in the company’s network, and clinics are operating in more than 20 countries.

If you have been suffering from lice infestations for far too long, find your nearest Lice Clinics of America clinic and get treated today.


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