You pour a glass of milk, drink half of it, and spend the next hour dealing with cramps and a bloated stomach. A friend tells you it's just a Filipino thing, and it turns out they're closer to right than you'd expect. More than half of Filipinos are lactose intolerant, with some estimates putting the figure as high as 70 to 90 percent.[1] Understanding why this happens changes how you might approach dairy going forward.
Why lactose intolerance increases with age
Everyone produces lactase, the enzyme that breaks down lactose, as an infant. In most humans globally, lactase production naturally declines after weaning, since the body no longer expects milk to be a primary food source. Filipino studies tracking this decline found lactase deficiency rising sharply through early childhood, from 23 percent at ages one to two up to 86 percent by ages nine to ten.[2] This pattern is the genetic norm for most of the world's population. Populations with a long history of dairy farming, parts of Northern Europe especially, are the genetic exception, having evolved to keep producing lactase into adulthood. This kind of population-specific genetic difference echoes other conditions where Filipino bodies respond differently than Western reference data assumes, including why Filipinos develop type 2 diabetes at lower BMI than Western populations.
What happens in your gut when lactose isn't broken down
Undigested lactose reaches your colon intact, where gut bacteria ferment it, producing gas and drawing water into the colon, which causes the bloating, cramping, and diarrhea associated with lactose intolerance. Lactose intolerance isn't an allergy and isn't dangerous; it's a mismatch between the sugar you've eaten and the enzyme available to break it down.
Why carabao milk sits differently with a lot of Filipinos
Cow's milk
98% of dairy consumed in the Philippines is imported, mostly cow's milk
Higher lactose content relative to protein and fat
More commonly reported as harder to digest
Carabao's milk
Higher fat and protein content than cow's milk
Traditionally used in kesong puti and pastillas
Often tolerated better, though it still contains lactose
Carabao milk carries roughly 58 percent more calcium and 40 percent more protein than cow's milk, and many Filipinos who react poorly to cow's milk report tolerating carabao milk products better.[1] Carabao milk still contains lactose, but its different fat and protein composition appears to slow digestion in a way that reduces symptoms for some people, a distinction that matters most for households doing regular palengke shopping where fresh carabao milk or kesong puti is available.
What helps if dairy bothers you
- Fermented dairy, yogurt and some cheeses, contains less lactose than fresh milk since fermentation breaks some of it down before you eat it, which is why yogurt is often tolerated even by people who react to milk
- Lactase supplements, taken before consuming dairy, supply the enzyme your body isn't making enough of
- Smaller portions of dairy, spaced out rather than consumed all at once, reduce symptoms for many people with mild to moderate intolerance
Dairy isn't the only place Filipino-specific genetics change dietary advice; see gut health and uric acid for another example.
What to do with this
If dairy consistently bothers you, don't assume you have to cut it out completely: try fermented dairy or carabao milk products first, add a lactase supplement before a meal that includes dairy, and keep portions small and spaced out rather than all at once.
Related reading
- Why Filipinos Develop Type 2 Diabetes at Lower BMI Than Western Populations
- Gut Health and Uric Acid: What Filipinos Need to Know About Gout and the Microbiome
- Gut Health and Hypertension: What Matters for the Philippines' Leading Killer
- How Palengke Shopping Habits Affect the Freshness and Gut Impact of What You Eat
