Dietary modification can also be a useful tool in prevention.  For example, a shift that decreases maize consumption in favor of other grains could reduce aflatoxin exposure. Certain food preparation techniques such as fermentation may reduce the intestinal absorption of aflatoxins.  While such changes are not always possible for large-scale application, they may be adopted  on an individual level.  Education regarding the sources of aflatoxin can help consumers avoid foods that are most likely to be contaminated.