What are the symptoms of lactose intolerance?

And how long do these symptoms last?What are the symptoms of lactose intolerance?
Gas, diarrhea, anguish, etc. They last as long as the substance is within the GI tract. Being lactose intolerant means your body does not produce, or simply produces limited amounts of lastase. Lactase is needed to digest dairy products, lactose is milk sugar. Without the enzyme, this sugar "ferments" surrounded by the intestines and produces gas and causes the diarrhea.
Some empire can have LIMITED amounts of dairy.
diareaah
Common symptoms include nausea, cramps, bloating, gas, and diarrhea. Symptoms originate about 30 minutes to 2 hours after drinking or drinking foods containing lactose. The time depends on how old you are, your ethnicity, and digestion rate - so in that isn't really a time rate to follow.
Diahrrea, cramping, and SOMETIMES throwing up. The symptoms last until the lactose surrounded by the product you ate that had it get out of your system.