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Good vanilla beans are incredibly fragrant, flavorful, and enchanting. There are 3 major varieties, Madagascar, Tahitian, and Mexican. There are also some from Indonesia and Uganda.
There are several grades of vanilla beans, premium being the best, be sure to buy these.
The best growing techniques and conditions yield the best beans with the most vanillan along with the other 200 plus flavor components, Madagascar is the best in most experts opinion.
Good vanilla is not just psychological. There is a reason that it is the most popular flavoring in the world. It also is used in perfumes, shampoos and other products that need a wonderful aroma because it is so pleasant and satisfying.