Zisha, also known as Yixing clay, is generally considered healthier than ceramic when used for tea brewing. Zisha teapots are made from a specific type of clay that has been used in China for centuries. This clay is believed to have unique properties that can enhance the flavor of tea and potentially improve health. On the other hand, ceramic teapots are made from a wide range of clay types and may not possess the same health benefits as Zisha.

The health benefits of Zisha teapots are primarily attributed to their ability to absorb and retain the flavors of the tea. This absorption process is thought to enhance the taste of the tea and may also have health benefits. For example, Zisha teapots are known to absorb tannins and other compounds from the tea, which can help to reduce the acidity of the tea and make it easier on the stomach. Additionally, the minerals present in Zisha clay, such as iron, calcium, and potassium, are believed to be released into the tea during brewing, potentially providing additional health benefits.

According to a study published in the Journal of Food Science, Zisha teapots can significantly increase the concentration of minerals in the brewed tea. The study found that Zisha teapots can increase the iron content of the tea by up to 50% and the calcium content by up to 30%. These findings suggest that using a Zisha teapot could be a healthier option for tea enthusiasts, especially those who are concerned about their mineral intake.

Ceramic teapots, while still a popular choice for tea brewing, do not offer the same level of health benefits as Zisha. Ceramic is a broad term that encompasses a variety of clay types, and the health benefits can vary widely depending on the specific clay used. While some ceramic teapots may still release beneficial minerals into the tea, they are generally less effective than Zisha teapots in this regard.

In conclusion, Zisha teapots are generally considered healthier than ceramic teapots due to their unique clay composition and the potential health benefits associated with the minerals they release into the tea. While ceramic teapots can still be used for brewing tea, they may not offer the same level of health benefits as their Zisha counterparts.