17/07/2026
For this Nutrition Month post, we researched the myth: "Milk causes phlegm and makes colds or coughs worse." After checking credible sources like FNRI-DOST and DOH, we discovered that this belief is a myth.
Research shows that drinking milk does not increase the body's production of mucus or phlegm. Some people may only feel that their throat becomes thicker after drinking milk because it mixes with saliva, creating a temporary coating. This sensation does not mean that more mucus is being produced.
Myth: "Milk causes phlegm and makes colds or coughs worse."
Is it TRUE?
❌ No. This is a MYTH.
✔️ FACTS
🥛Milk does not increase the production of phlegm. Scientific studies show that drinking milk does not make your body produce more mucus.
🥛Milk may only make your mouth or throat feel coated. This temporary sensation can make mucus seem thicker, but it does not actually increase phlegm.
🥛Milk is rich in nutrients. It provides calcium, protein, vitamin D, and other nutrients that support strong bones, muscles, and overall health—even when you have a cold.
Most people with colds or coughs can safely drink milk. Unless a doctor advises otherwise or you have a milk allergy or lactose intolerance, milk does not worsen coughs or colds.
What to Do Instead
✅ Drink plenty of water to stay hydrated.
✅ Eat a balanced diet with fruits, vegetables, and protein-rich foods.
✅ Get enough rest.
✅ See a healthcare professional if your cough or cold becomes severe or lasts a long time.
Overall there is no scientific evidence that milk causes more phlegm or makes colds and coughs worse. Milk is still a healthy source of important nutrients such as calcium, protein, and vitamin D, which help keep our bones and muscles strong. Colds and coughs are caused by viruses–not by drinking milk.
