Millet has been used traditionally in various systems of medicine, such as Traditional Chinese Medicine (TCM), to support digestive health, including the function of the small intestine. In TCM, millet is considered easy to digest and is often recommended for individuals with weak digestion, diarrhea, or inflammation of the intestines. Millet porridge is a common convalescent food in East Asia, believed to "nourish the spleen and stomach," which in TCM theory is closely related to the function of the small intestine.

Scientifically, millet is a gluten-free whole grain rich in fiber, B-vitamins, and minerals like magnesium and phosphorus. Its fiber content may support digestive health by promoting regular bowel movements and contributing to a healthy intestinal environment. However, there is little direct scientific evidence specifically linking millet consumption to enhanced small intestine function or health beyond general digestive support. Most studies focus on millet's benefits for metabolic health, such as blood sugar regulation, rather than targeted effects on the small intestine.

In summary, the use of millet to support the small intestine is primarily rooted in traditional practices, especially within TCM, with only indirect scientific support related to general digestive health. The direct evidence for specific small intestine benefits is limited.