What Is Lactose Intolerance?
Lactose intolerance is a common digestive condition in which the body is unable to fully digest lactose, the natural sugar found in milk and dairy products. This occurs due to a deficiency of lactase, the enzyme produced in the small intestine that breaks down lactose into simpler sugars (glucose and galactose) for absorption.
When undigested lactose reaches the large intestine, gut bacteria ferment it, producing gas, bloating, cramping, and diarrhea. Lactose intolerance is particularly prevalent among people of East Asian descent, affecting up to 90% of this population, as well as among African American, Hispanic, and Native American communities.
At Dr. Jing Tong Gastroenterology in Flushing, NY, we provide definitive lactose intolerance testing and comprehensive dietary management. Understanding the high prevalence of this condition in our community, Dr. Tong offers culturally sensitive care and practical dietary strategies to help patients manage their symptoms effectively.
Symptoms of Lactose Intolerance
Bloating & Gas
Abdominal Cramps
Diarrhea
Nausea
Symptoms 30 Min-2 Hr After Dairy
Gurgling Stomach Sounds
Diagnosis & Treatment
Hydrogen Breath Test
The lactose hydrogen breath test is the gold standard for diagnosing lactose intolerance. After drinking a lactose solution, breath samples are collected over several hours. Elevated hydrogen levels indicate lactose malabsorption. This is a simple, non-invasive test performed in our Flushing office.
Dietary Management
Most people with lactose intolerance can tolerate small amounts of dairy. Dr. Tong helps you determine your personal tolerance threshold and develop a dietary plan. Strategies include choosing aged cheeses and yogurt (which have less lactose), lactose-free products, and plant-based alternatives.
Lactase Enzyme Supplements
Over-the-counter lactase enzyme tablets or drops can be taken with dairy-containing meals to help digest lactose. Dr. Tong advises on proper dosing and timing to maximize effectiveness and allow you to enjoy dairy foods with minimal symptoms.
Calcium & Vitamin D Monitoring
Reducing dairy intake can lead to calcium and vitamin D deficiencies, increasing osteoporosis risk. Dr. Tong monitors bone health markers and recommends appropriate calcium-rich non-dairy foods and supplements to maintain adequate nutrition.
Why Choose Dr. Jing Tong?
Johns Hopkins Trained
Expert diagnostic skills to differentiate lactose intolerance from other conditions with similar symptoms.
Community Understanding
Deep understanding of lactose intolerance prevalence in the Asian American community with culturally appropriate dietary advice.
Multilingual Care
Discuss dietary needs in Mandarin, Shanghainese, or English for clear, practical guidance.
Frequently Asked Questions
Is lactose intolerance the same as a milk allergy?
No. Lactose intolerance is a digestive issue caused by lactase enzyme deficiency. Milk allergy is an immune system reaction to proteins in milk (casein or whey) and can cause potentially severe allergic reactions. They require different diagnostic approaches and management strategies.
Why is lactose intolerance so common in Asian populations?
Lactase production naturally decreases after weaning in most of the world's population. This is called primary lactose intolerance and is genetically determined. Up to 90% of East Asian adults have reduced lactase activity, compared to about 5-15% of Northern Europeans, reflecting historical differences in dairy consumption.
Can I still eat some dairy with lactose intolerance?
Yes, most lactose-intolerant individuals can tolerate small amounts of dairy, especially when consumed with other foods. Hard and aged cheeses (cheddar, parmesan, Swiss) contain very little lactose. Yogurt is often better tolerated because its bacterial cultures help digest lactose.
Can lactose intolerance develop suddenly?
Primary lactose intolerance develops gradually as lactase production decreases with age. However, secondary lactose intolerance can develop suddenly after an intestinal illness, surgery, or conditions like celiac disease or Crohn's disease that damage the small intestine lining. The secondary form may be reversible once the underlying condition is treated.
How do I get enough calcium without dairy?
Excellent non-dairy calcium sources include fortified plant milks (soy, almond, oat), tofu made with calcium sulfate, leafy greens (bok choy, kale, broccoli), canned sardines and salmon with bones, and calcium supplements. Dr. Tong can help ensure your nutritional needs are met.
Related Services
Get Tested for Lactose Intolerance
A simple breath test can confirm your diagnosis. Schedule your appointment at our Flushing office.