Our body needs base metals like copper, Zinc, Tin etc for better health. In Ayurveda also many metal powder (bhasma) is prescribed to cure many diseases. Metals and minerals cannot be produced within the body. External intake of these metals in diet is one of the sources. Plants absorb metals from the soil hence level of metal in them depend on quality of the soil. Therefore vessels and utensils made from these metals are the best source that our grandparents used for years.
According to laboratory test 97% micro nutrients are reserved in Bronze utensils whereas 95% micro nutrients are reserved in utensils.