East Asians Evolved Milk Tolerance Pre-Dairying
Recent genetic research has revealed that East Asian populations began developing lactase persistence—the ability to digest lactose into adulthood—before the advent of cattle domestication and dairying practices in the region. This finding challenges the traditional gene-culture coevolution model, which posits that lactase persistence evolved primarily in response to the consumption of dairy products following the domestication of milk-producing animals.
The study suggests that in East Asia, genetic adaptations for lactose digestion may have occurred independently of, or prior to, the cultural practices of animal husbandry and milk consumption. This indicates a more complex evolutionary pathway for lactase persistence, involving factors beyond direct dietary pressures from dairy consumption.
For the dairy industry, especially in regions like India where lactose intolerance is prevalent, these insights underscore the importance of understanding genetic diversity in lactose digestion. It highlights potential markets for lactose-free or lactose-reduced dairy products and the need for tailored nutritional strategies that consider genetic predispositions.
Industry Insight:
The discovery of early lactase persistence in East Asian populations suggests that genetic factors influencing dairy consumption are more intricate than previously thought. Dairy producers and marketers should consider these genetic variations when developing products and strategies for diverse populations, potentially expanding offerings of lactose-free or alternative dairy products to cater to varying consumer needs.
Source : DAirynews7x7 May 15th 2025 The Hindu