Will drinking milk cause diarrhea? Will drinking goat's milk also cause diarrhea?

Diarrhea refers to loose or watery stools. In general, whether drinking goat's milk causes diarrhea when cow's milk does depends on the underlying cause. The details are as follows:

1. Possible

Cow's milk is a nutritious food rich in various nutrients including proteins, fats, carbohydrates, vitamins, and minerals. It supports bone health, strengthens the immune system, and helps replenish nutrition. Goat's milk is also a source of nutrition and energy, rich in fats, proteins, and minerals, and helps promote bone health and prevent osteoporosis. Lactose, the natural sugar found in milk products, requires the enzyme lactase for digestion. When the body lacks sufficient lactase, lactose cannot be effectively digested and absorbed, leading to symptoms of lactose intolerance such as bloating, abdominal pain, and diarrhea. Additionally, milk products contain fat, and some individuals' digestive systems may not tolerate this fat well, which can also lead to diarrhea or indigestion. If a person experiences diarrhea after drinking cow's milk due to lactose intolerance or poor fat tolerance, then drinking goat's milk—which also contains lactose and fat—may similarly cause diarrhea.

2. Unlikely

If the diarrhea caused by drinking cow's milk is due to an allergy to casein (a protein in cow's milk) or consumption of contaminated milk containing pathogens, then drinking goat's milk might not cause diarrhea. This is because the casein in goat's milk differs from that in cow's milk, and if the goat's milk is clean and free of contaminants, it may be tolerated without gastrointestinal symptoms.

If diarrhea occurs, individuals are advised to seek medical attention promptly to prevent worsening of the condition.