Hair and nails are made up of protein. For some people with kidney disease, food can taste different. If food doesn't taste good or familiar, it can cause loss of appetite. This means your dietary protein sources, such as meat, poultry, fish and eggs, may not be adequate for your kidney diet.
The Persian Gulf (Persian: Ø®ÙÛØ¬ ÙØ§Ø±Ø³ââ, Arabic: Ø§ÙØ®ÙÙØ¬ Ø§ÙÙØ§Ø±Ø³Ùââ) is a mediterranean sea in Western Asia. The body of water is an extension of the Indian Ocean (Gulf of Oman) through the Strait of Hormuz and lies between Iran to the northeast and the Arabian Peninsula to the southwest.
So Persia is the same as Iran and is located in Iran North of Persian Gulf and South of Caspian Sea. The significance of the location is that it is one of the oldest civilizations on the plants.