What actually stops chilli burn in your mouth
Milk is the best-tested fix. In a 72-person study, every drink tested, including plain water, reduced chilli burn compared with no drink, but whole milk, skim milk and a sweet fruit drink worked best, and skim worked as well as whole. Protein, not only fat, appears to help. The burn also fades on its own.
Checked October 20, 2026 · How we source facts
Why chilli burns
The burn comes from capsaicin, which binds a nerve receptor called TRPV1, the same receptor that responds to heat [6]. When capsaicin binds it, the receptor fires at a lower temperature, so nerve endings send a burning signal even though nothing is actually hot [6].
Capsaicin is practically insoluble in cold water but freely soluble in alcohol [3]. That is one reason plain water rinses it away poorly and why researchers have looked at fat, protein and sugar instead [1].
What the drink test found
Researchers at Penn State gave 72 adults spicy tomato juice, then a 40 mL rinse of one of seven drinks: skim milk, whole milk, seltzer, a cherry fruit punch (Kool-Aid), non-alcoholic beer, cola and room-temperature water [1]. Participants rated the burn every 10 seconds for two minutes [1].
Every drink reduced the burn compared with no rinse [1]. The largest reductions came from whole milk, skim milk and the fruit punch [1]. Cold seltzer and room-temperature water were the two least effective drinks, though they still beat no rinse [1].
The authors concluded that milk is the best choice regardless of its fat content, which suggests protein may matter more than fat [1]. The sweet fruit punch probably helped because of its sugar; earlier studies also found that sugar solutions reduce burn [1].
Protein, not only fat
A 2024 Penn State follow-up found that full-fat milk was not more effective than fat-free milk at cooling the burn [2]. Ultra-filtered, high-protein, full-fat milk worked best of all the milks tested [2].
Soy milk also cut the burn, and soy milk with more protein worked better [2]. The researchers say more work is needed to pin down how much fat and protein each contribute [2].
What to do when a bite is too hot
The burn usually fades by itself: in the drink study, the burn from spicy juice alone dropped from between moderate and strong to just above weak within two minutes [1]. Very hot products can be different: Poison Control says the irritation from extremely hot challenge chips can last several hours and, in some people, days [5].
- Take sips of milk; Poison Control suggests small sips of milk or water [4], and notes milk may work better than water [5].
- If there is no milk, a sweetened drink or soy milk are tested alternatives [1][2].
- Plain water still helps a little compared with doing nothing [1].
- Wash your hands with soap and water before touching your eyes or face [5].
What doesn’t work
- Believing water does nothing: it reduced burn versus no rinse, but it was among the least effective drinks tested [1].
- Assuming only full-fat dairy works: skim milk matched whole milk, and fat-free matched full-fat in the follow-up study [1][2].
- Reaching for fizzy water: cold seltzer was one of the two least effective drinks [1].
- Assuming beer helps: only non-alcoholic beer was tested, and whether the alcohol in regular beer helps or worsens the burn is an open question [1].
Questions
Is milk better than water for spicy food?
Yes. In a 72-person study, whole and skim milk were among the most effective drinks, while room-temperature water and cold seltzer were the least effective, although water still beat no rinse.
Does it have to be whole milk?
No. Skim milk worked as well as whole milk in the 2019 study, and fat-free milk matched full-fat milk in a 2024 follow-up.
Do plant milks work?
Soy milk cut the burn in the 2024 Penn State study, and higher-protein soy milk worked better.
Why doesn't water wash capsaicin away?
Capsaicin is practically insoluble in cold water, so water rinses it away poorly, although rinsing with water still reduced burn in testing.
How long does chilli burn last?
In the lab test the burn from spicy juice faded to just above weak within two minutes. Very hot challenge products can cause irritation lasting several hours, or days in some people.
More guides
Sources
- Nolden, Lenart & Hayes, Physiology & Behavior 208:112557 (2019): 72-adult beverage test; all drinks beat no rinse; whole milk, skim milk and Kool-Aid best; water and seltzer least effective; milk best regardless of fat; burn decay over 2 minutes; sugar and beer notes.
- Penn State News (2024), reporting Gaiser & Hayes, Food Quality and Preference: 2024 study: full-fat not better than fat-free; ultra-filtered high-protein milk best; soy milk works, more protein works better. (secondary source)
- PubChem, US National Library of Medicine: Capsaicin practically insoluble in cold water; freely soluble in alcohol.
- National Capital Poison Center (Poison Control): Small sips of milk or water may help; symptoms of eating too much; call emergency services for trouble breathing or chest discomfort.
- National Capital Poison Center (Poison Control): Milk may beat water; symptoms can last hours to days; seek care for chest pain, difficulty breathing, severe headache; high-risk groups; wash hands.
- Barker & Elston, Cutis 111(5):241-243 (2023), doi:10.12788/cutis.0761: Capsaicin binds TRPV1, lowering its heat threshold and producing a burning sensation. (secondary source)