It often comes as a surprise: one day, your morning latte or cheesy pasta no longer agrees with you. You might notice bloating, cramping, wind, or even skin flare-ups after eating dairy — symptoms you never used to associate with your favourite foods. So, what changed?
The answer lies in a naturally declining enzyme: lactase.
What Is Lactase and Why Is It Important?
Lactase is a digestive enzyme produced in the small intestine. Its job? To break down lactose, the natural sugar found in milk and dairy products, into two simpler sugars — glucose and galactose — so they can be absorbed into the bloodstream.
When your body doesn’t produce enough lactase, undigested lactose travels into the colon, where it ferments — leading to gas, bloating, cramps, and often an urgent dash to the bathroom.
Lactase Production Declines Naturally With Age
While babies are born with high levels of lactase (to digest breastmilk), many people gradually produce less as they age. This is especially common after childhood and can happen even in people who tolerated dairy for most of their lives.
This phenomenon is known as lactase non-persistence and is surprisingly common — affecting:
- Around 15% of people in Ireland & the UK
- Up to 70–100% in some non-European populations
So Why Now? Triggers for Adult-Onset Lactose Intolerance
You might suddenly notice symptoms due to:
- Age-related decline in enzyme activity
- Gut infections or inflammation that damage the intestinal lining
- IBS or leaky gut, where the gut’s ability to produce enzymes is compromised
- Stress, antibiotics, or other medications that disrupt the gut microbiome
Even if your body once handled dairy just fine, changes in your gut health or enzyme levels can flip the switch.
At Balance Nourish Thrive, We Look at the Bigger Picture
In biokinesiology and functional testing, we often see that lactose intolerance is part of a bigger digestive imbalance. If your body isn’t breaking down lactose, chances are:
- There may be enzyme deficiencies
- Your gut lining needs support
- There’s possible dysbiosis (imbalance in gut flora)
- Or deeper food sensitivities at play
We don’t just advise “cutting out dairy” — we help uncover why your body has lost its tolerance, and what steps can help restore balance.
What You Can Do
If you suspect dairy is an issue:
- Track your symptoms after consuming milk, cheese, yoghurt or cream
- Try switching to lactose-free products or plant-based alternatives
- Consider a lactase enzyme supplement before dairy-rich meals. Try use on special occasions only
- Work with a practitioner to explore deeper gut healing strategies
Final Thought
Becoming lactose intolerant later in life is more common than many realise — and it’s not something to just “live with.” Your digestive system is always talking to you. At Balance Nourish Thrive, we help you listen, decode, and support it naturally.
Want to find out if lactose or another food is affecting your health?
Book a gut health consultation or biokinesiology session today.
