Mentioned by cityunscripted.com
Best places to eat in Mexico City- a local's ultimate gu
"I am a market lover, if you haven't guessed it yet, and Mexico is the country of colourful and traditional mercados where many locals still go shopping or have lunch. My favourite food market in the historical centre is Mercado San Juan, famous for its huge variety of exotic products - meat, insects, fruits and vegetables - as well as a very special attention to customers. Among its gourmet products, it is well renowned for its fishes’ quality."