In 2025, researchers Shuai Ma, Yu Miao, and Xinxin Wu from Heilongjiang University of Chinese Medicine analyzed data from NHANES 2007–2018 on 27,487 U.S. adults. They looked at intake of fermented dairy like yogurt, cheese, and buttermilk, using surveys and health records to link it to stroke history, adjusting for age, smoking, and other factors.