When you think of mayonnaise, the first thing that comes to mind is egg salad, tuna salad, and summer, right? It’s a staple in many kitchens, ranking probably second or third after ketchup and salt. But there are also a number of beauty hacks that you can do using mayonnaise.

In case you've ever wondered, the name is of French origin, and actual mayo is made using whipped egg yolk and oil. Other things can be added to it to change the flavor, such as lemon juice or herbs. Although eating mayonnaise may be unhealthy because of its high-fat content, its high-protein content makes it extremely healthy to use for hair and skin. Here are a few other beauty treatments using mayo:

1. Condition Your Hair

Hair needs protein to grow and maintain its luscious appearance. Using mayonnaise in a hair mask or mixture can add nutrients back into damaged locks. Just apply a liberal amount of mayo to your hair, comb it from root to tip, and let it sit for about an hour. This will give the hair a perfect amount of time to soak in all of the goodness. Do this once a week, and it should help to restore some moisture to damaged hair.

2. Soothe Sunburn

So you’re sitting out by the pool or the beach and you overdo it. Now you’re left with a nasty little sunburn. And while there are many treatments, using mayo is also an alternative. According to Yahoo Health contributor, Dr. Kristie Leong, using cold mayonnaise can be extremely soothing.

3. Soften Dry Cuticles

You can either apply them to you individual nail bed, or slather mayonnaise all over your hands and put them in cotton gloves. If you choose the first method, make sure you massage the mayo in so that your skin can absorb it. This will also help to strengthen your nails.

4. Exfoliate Dead Skin From Feet

In the summertime, most of us bare our toes and feet by wearing sandals or being at the beach. This can cause dead skin and calluses to form. Put mayonnaise all over your feet, slip on some cotton socks, and tie a plastic bag over both of your feet. This way the product won’t seep out and get all over your floors.

5. Kills Head Lice

Anything with vinegar will help to kill head lice, and mayonnaise is no different. Section your hair off and apply mayonnaise to your scalp. You’ll not only help to kill those nasty critters, but you’ll give your hair a deep conditioning treatment, too.