A recent study published in the journal Nutrients suggests that increasing milk consumption to recommended levels could lower stroke incidence and reduce national healthcare spending in Japan, according to a Mar. 16 report.
The research highlights the potential for modest dietary changes, such as raising average milk intake among adults aged 30 to 79 years to 180 grams per day (about two servings), to deliver meaningful public health benefits. Over a ten-year period, this adjustment was projected to decrease stroke incidence and related mortality by approximately 7 percent overall, with some subgroups seeing reductions up to 10.6 percent. The study also estimated a reduction in stroke-related national healthcare expenditure by about 5.1 percent overall.
Stroke remains one of Japan’s leading causes of death and places significant pressure on the country’s healthcare system. Survivors often face long-term limitations in daily functioning and quality of life. Diet is increasingly recognized as a modifiable factor for reducing stroke risk, with recent meta-analyses indicating that higher milk intake may be linked to lower likelihood of stroke. Milk provides minerals like calcium, magnesium, and potassium that are thought to contribute to cardiovascular protection, though the exact biological mechanisms are not fully understood.
Despite these potential benefits, dairy intake in Japan currently falls short of national dietary guidelines. To assess the impact of meeting these recommendations through increased milk consumption, researchers used an age- and sex-stratified Markov model simulating health effects and cost implications over a decade. The model included various types of strokes and considered both immediate increases in milk intake as well as gradual annual increases compared with baseline levels from 2023.
Key findings showed that immediate adoption of recommended milk intake could reduce stroke incidence and mortality by 7 percent while lowering related healthcare spending by over five percent. Gradual increases yielded smaller but still notable benefits. The greatest absolute declines were seen among adults aged 70–79 years; however, younger groups experienced larger percentage reductions due to initially lower dairy consumption.
The study authors note that achieving widespread changes in milk consumption may require coordinated efforts from policymakers, public health agencies, and food manufacturers through education campaigns or targeted subsidies. They also suggest future research should consider long-term caregiving costs and examine differences between types of milk or population subgroups for more precise policy guidance.
