Does Lactose Intolerance Get Worse with Age?
It may feel worse—but that's usually digestion, not lactose.
The Reality / Science
Lactose intolerance itself doesn't worsen with age—your lactase production stays stable once it's set. But *symptoms* can feel worse for other reasons: slower digestion in general, reduced stomach acid, changes in gut bacteria, and increased stress. These are normal aging processes, not lactose intolerance progressing.
What often happens: A child tolerates small amounts of dairy fine. As they grow, they eat more (larger meals, more variety). Larger amounts = more noticeable symptoms. Parents interpret this as "getting worse" when it's actually just "eating more."
"Lactase production remains stable throughout life in those who maintain it. Perceived worsening is usually due to changes in overall digestive function or dietary patterns." — Mayo Clinic
Why the Myth Persists
Correlation feels like causation. A child gets older, symptoms seem worse, so parents assume lactose intolerance is progressing. But it's usually a combination of larger portions, busier schedules, stress, and normal digestive aging. The lactose intolerance itself is static.
Parental Perspective
If your child's symptoms seem to be worsening, it's worth tracking: Are they eating more dairy? More processed foods? More stress? Sleeping less? These factors matter more than age. You're not failing to manage their condition—you're just seeing the effects of growing up and eating more.
Takeaway / Action Tip
- Lactose intolerance worsening: Symptoms from smaller amounts of dairy (rare).
- Digestion changing: Symptoms worse after larger meals, more stress, or less sleep (common).
- What to do: Keep a food & symptom diary for 2 weeks. Look for patterns beyond just "dairy."
Remember: Your child's lactose intolerance is stable. What's changing is their body, diet, and lifestyle.