Each100g coffee bean contains 2.2g water,12.6g protein,16g fat, 46.7g sugar, 9g cellulose, 4.2g ash,120mg calcium,170mg phosphorus and 42mg iron. Every100g of coffee extract contains 99.5g of water, 0.2g of protein, 0. 1 g of fat, 0. 1 g of ash, trace sugar, 3mg of calcium, 4mg of phosphorus, 2mg of sodium, 0.0 1 mg of vitamin B2 and 0.3mg of nicotinic acid. 10g coffee was dissolved in hot water containing 0.04g caffeine and 0.06g tannin.