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October 28, 2021/Living Healthy/Primary Care

Can Milk Relieve the Pain from Spicy Food?

Why water doesn’t work and what to do instead

spicey chili with a glass of milk

You’re just trying to make dinner — and suddenly it’s like your eyes are on fire. After cutting a hot pepper, you’ve accidentally touched your face, and now you’re feeling the burn. Ouch!

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Whether you’re feeling that post-pepper prickle in your eyes, mouth or stomach, it’s all from the same ingredient: capsaicin, a chemical irritant found in all varieties of chili peppers. And if you’ve ever tried to quell that fiery feeling with water, you know, it’s not an easy flame to extinguish.

Family medicine specialist Mark Rood, MD, explains why it happens, how to soothe the scorch and what to try instead of H20.

Does milk help with spicy food?

First, a little lesson in heat levels. Chili peppers’ spiciness is measured using the Scoville scale, which ranks each one in Scoville Heat Units, or SHUs. The higher a pepper’s SHU, the more capsaicin it contains, and the spicier it tastes — and feels.

A 2019 study compared how seven beverages stacked up against spicy foods: skim milk, whole milk, seltzer water, cherry Kool-Aid®, non-alcoholic beer, soda, and water. It found that only skim milk, whole milk and cherry Kool-Aid had any notable impact against the heat.

“Rinsing your mouth with anything is better than nothing,” Dr. Rood says, “but only milk and Kool-aid outperformed plain water.”

Milk contains a protein called casein, which can break down capsaicin — much in the same way that dish soap can cut through grease.

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Doctors had previously assumed that whole milk would be more effective against spicy foods than skim milk due to the former’s fat content, but they both performed the same. Dr. Rood says this indicates that fat content isn’t a factor in the fight against spice.

That means that post-pepper, any kind of animal milk should do the trick. But don’t bother with milk substitutes (almond milk, oat milk, etc.), which don’t contain casein.

Why doesn’t water work against spicy food?

Let’s go back to that dish soap analogy for a moment. If you’ve ever tried to wash a greasy skillet using just water, you probably realized pretty quickly that it doesn’t work. That’s because water can’t break up grease molecules; you need soap for that.

The same is true of spicy foods. Capsaicin doesn’t dissolve in water, so while rinsing your mouth or your eyes may provide some cooling relief, it won’t do much overall. Enter casein, which can do what water can’t.

Can sugar help fight spicy food?

Sweet, flavored drinks probably fight spicy foods because of their high sugar content, Dr. Rood says, explaining cherry Kool-Aid’s place in the data.

“There are reports that say that sucrose reduces the burn of spicy foods, although it’s not as robust of a solution as milk,” he explains.

If you don’t have milk or Kool-Aid on hand when you find yourself with that mouth-on-fire feeling, try sucking on a sugar cube, which may reduce your discomfort.

Is alcohol effective against spicy food?

The 2019 study only tested non-alcoholic beer, so no IPAs or hefeweizens got to test their chops against capsaicin.

As it turns out, though, alcohol can indeed break down capsaicin. But because most beers are primarily made of water, with only about 5% alcohol, they’re largely ineffective against pepper-induced pain.

Harder spirits could help in large quantities, but heavy drinking isn’t generally advisable. You’re better off sticking with milk.

Is it safe to put milk in your eyes?

It may sound a little gross to think about pouring dairy into your eyes, but hear us out. Just as milk can ease a burning mouth, so too can it soothe the pain of touching your eyes after prepping a pepper.

Have you ever heard of protesters splashing their eyes with milk after being pepper-sprayed? It’s the same idea, as capsaicin is the active ingredient in pepper spray.

“It’s not uncommon for medicals professionals to have milk available to render first aid to protesters impacted by tear gas and pepper spray,” Dr. Rood says. “Milk is safe for use in your eyes, and there is precedent for using it that way without harm.”

Upset stomach? Don’t turn to milk

Maybe your mouth is fine, and you kept your fingers out of your eyes. (Good job!) But spicy foods can just as easily cause a fire in the belly.

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If you’re experiencing indigestion after eating something spicy — think acid reflux, a roiling stomach or even ulcers — milk isn’t the hero you need. “Milk can actually worsen those symptoms because it sometimes stimulates acid that then has to then be digested, which starts a cycle,” Dr. Rood warns.

Plus, for the estimated 36% of Americans who are lactose intolerant, consuming milk and other dairy products can lead to more cramps, gas, bloating and diarrhea.

If that Nashville hot chicken or Thai green curry has left you with a troubled tummy, your best bet is to pop a calcium carbonate antacid (like Tums® and Rolaids®), which will neutralize your stomach acid and help stop the burn.

Prevent spicy food troubles

The best way to avoid the problems associated with spicy foods is to, well, avoid spicy foods altogether. But if you enjoy the taste — and maybe get a kick out of the burn — just take precautions:

  • Wear gloves when cutting peppers, and avoid touching your skin, especially around the eyes.
  • After handling peppers, remove your gloves and thoroughly wash your hands using soap.
  • Wear googles if you’re cutting peppers with an extremely high SHU, such as Carolina Reapers or bhut jolokia (ghost peppers).

And of course, keep some milk on hand!

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