Kitron Naxou is a lemon liqueur produced on the Greek island of Naxos. It is made from the fruit and leaves of the citron tree, which is similar to the lemon tree but stronger and slightly different in taste. Kitron comes in three varieties. The green variety is sweeter and contains less alcohol. The yellow variety is the strongest and has the least sugar. Clear Kitron is somewhere in between, and is perhaps the best for a new drinker to sample.