Chia (Salvia hispanica) is an herb that originated in Mexico and was cultivated by the Aztecs. It's grown for its seed, a source of omega-3 fatty acids.

In addition to omega-3 fatty acids such as alpha-linolenic acid (ALA), chia seeds contain a large amount of dietary fiber. Omega-3 fatty acids and dietary fiber might help reduce risk factors for heart disease.

People use chia seed for diabetes, athletic performance, high blood pressure, heart disease, itching, and many other conditions, but there is no good scientific evidence to support these uses.