Why does the price of instant coffee fluctuate? The price of green coffee beans, the raw material behind the production of instant coffee, is subject to constant and strong fluctuations in the international markets. These variations are mostly the result of the world production of coffee and its consumption. However, the crops are also affected by climatic, economic and political factors in the producing countries, as well as by the capacity of the coffee growers to invest. Another relevant factor is the involvement of the investment funds in the International Coffee Exchanges.       What is the nutritional value of instant coffee? On average, instant coffee provides about 100 calories of energy per 100gr of net weight. Decaffeinated coffee provides about 110 calories of energy per 100gr. A teaspoon of coffee contains approximately 2g. Thus, instant coffee provides only 2 calories per cup and decaffeinated coffee slightly more than 2 calories.